CN105081541B - A kind of method that use electric resistance welding produces half metallurgy type metal composite pipe - Google Patents
A kind of method that use electric resistance welding produces half metallurgy type metal composite pipe Download PDFInfo
- Publication number
- CN105081541B CN105081541B CN201510579275.XA CN201510579275A CN105081541B CN 105081541 B CN105081541 B CN 105081541B CN 201510579275 A CN201510579275 A CN 201510579275A CN 105081541 B CN105081541 B CN 105081541B
- Authority
- CN
- China
- Prior art keywords
- pipe
- metal composite
- base tube
- electrode
- welding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/002—Resistance welding; Severing by resistance heating specially adapted for particular articles or work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/34—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention discloses a kind of method that use electric resistance welding produces half metallurgy type metal composite pipe, including step：First, base tube and bushing pipe are processed；2nd, base tube and bushing pipe assembling and machinery are compound, form mechanical metal composite pipe；3rd, electric resistance welding prepares：Two resistance welding electrodes of resistance welder are separately mounted to mechanical metal composite pipe two ends, one of resistance welding electrode is arranged on overhanging section of bushing pipe one end, and another resistance welding electrode is arranged on one end of base tube；4th, electric resistance welding：The base tube in mechanical metal composite pipe and bushing pipe are welded using resistance welder；Five：Following process.The inventive method step is simple, reasonable in design and realizes that convenient, welding quality height, using effect are good, and the bond strength in half metallurgy type metal composite pipe of machine-shaping between base tube and bushing pipe is high and high in machining efficiency, and crudy is easy to ensure.
Description
Technical field
The invention belongs to multiple tube processing technique field, half metallurgy type metal is produced using electric resistance welding more particularly, to one kind
The method of multiple tube.
Background technology
In the last few years, metal compounded pipe (also referred to as bimetal compound pipeline) is in oil and gas exploitation and transports, change
Increasingly extensive application is obtained in work and water supply and drainage industry.Metal compounded pipe is to lead to the metallic conduit of two kinds of unlike materials
Cross a kind of high-tech product that combination process combines in different forms.Metal composite pipe is by base tube and coaxial package in base tube
Interior bushing pipe composition, outside base tube mainly plays pressure-bearing and pipeline rigid support, and internal bushing pipe can effectively undertake
The corrosion-resistant effect of pipeline, so as to give full play to two kinds of respective excellent specific properties of material tubing, and significantly saves the lining of costliness
Alloy material.Therefore, metal composite pipe has great cost advantage compared to the pure material pipeline of anti-corrosion lining.
The interface form that metal compounded pipe is served as a contrast after being combined according to base can be divided into mechanical metal composite pipe and metallurgy type gold
Belong to two kinds of multiple tube.Wherein, mechanical metal composite pipe passes through spinning complex technique, hydraulic expanding-forming technology or detonation skill under water
Art etc. is plastically deformed bushing pipe, when realizing the mechanical interference actual use between base tube and bushing pipe, mechanical composite square
Formula all this not high mass defect of generally existing base bushing pipe bond strength, bushing pipe easily occurs because of base bushing pipe during actual military service
The bulge problem that bond strength is not high and causes, seriously reduces the security that product is used, and is answered while strongly limit metal
Close the application of pipe.
Metallurgy type metal composite pipe is that being combined between base tube and bushing pipe is realized with Metallurgical processing technique.Due to its base tube and
Bushing pipe interface is metallurgical binding, therefore bond strength is significantly larger than mechanical multiple tube.The manufacture work of metallurgy type metal composite pipe
Skill has many kinds, and such as metallurgical composite plate roll bending welding, centrifugal casting, built-up welding in pipe, base is served as a contrast in soldering, but above-mentioned technique one
A bit also in conceptual phase, there is that some manufacturing process are cumbersome and cost is higher.Thus, it need to design that a kind of method and step is simple, set
The metal composite pipe processing method that meter is rationally and realization is convenient, welding quality is high, using effect is good, the metal composite of machine-shaping
Bond strength in pipe between base tube and bushing pipe is high.
The content of the invention
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that providing one kind uses resistance
The method of weldering half metallurgy type metal composite pipe of production, its method and step is simple, reasonable in design and realization is convenient, welding quality is high,
Using effect is good, and the bond strength in half metallurgy type metal composite pipe of machine-shaping between base tube and bushing pipe is high, and processes
Efficiency high, crudy is easy to ensure.
In order to solve the above technical problems, the technical solution adopted by the present invention is：One kind produces half metallurgy type using electric resistance welding
The method of metal composite pipe, it is characterised in that this method comprises the following steps：
Step 1: base tube is processed with bushing pipe：The base tube and bushing pipe of produced metal composite pipe are processed respectively, it is described
The length of bushing pipe is more than the length of base tube；
Step 2: base tube is assembled with bushing pipe and machinery is compound：Bushing pipe described in step one is coaxially loaded in base tube, and made
The two ends of bushing pipe are extend out on the outside of base tube；Base tube is complex as a whole with bushing pipe using bimetal tube mechanical complex method again,
Form mechanical metal composite pipe；The section that the bushing pipe two ends are extend out on the outside of base tube is overhanging section；
Step 3: electric resistance welding prepares：Two resistance welding electrodes of resistance welder are separately mounted to described mechanical
Metal composite pipe two ends, one of them described resistance welding electrode is arranged on overhanging section of bushing pipe one end, and another described electricity
Welding resistance electrode is arranged on one end of base tube；
Step 4: electric resistance welding：The base tube in the mechanical metal composite pipe is entered with bushing pipe using resistance welder
Row welding, obtains half metallurgy type metal composite pipe；
Step 5：Following process：Bushing pipe in half metallurgy type metal composite pipe described in step 4 is extend out on the outside of base tube
Section cut off, then pipe end soldering and sealing or pipe end built-up welding are carried out to the half metallurgy type metal composite pipe, obtain half metallurgy type
Metal composite pipe finished product.
The method that a kind of above-mentioned use electric resistance welding produces half metallurgy type metal composite pipe, it is characterized in that：Described in step 2
Bimetal tube machinery complex method is spinning process, hydraulic expanding-forming method or detonation composite algorithm, the length L=15mm of the section of stretching out~
200mm。
The method that a kind of above-mentioned use electric resistance welding produces half metallurgy type metal composite pipe, it is characterized in that：Two in step 3
The resistance welding electrode is respectively the first welding tooling and the second welding tooling, first welding tooling and the second welding tooling
Constitute resistance welding frock and the two is connected with two power output ends of resistance welder respectively；Resistance Welding is carried out in step 3
When connecing preparation, row is put into the resistance welder and installed；
First welding tooling includes first electrode of the gripping sleeve on overhanging section of bushing pipe and is sleeved on described the
The first case on the outside of one electrode, the first electrode and bushing pipe are laid in coaxial, the material of first case and described the
The material of one electrode is identical；Second welding tooling includes second electrode of the gripping sleeve on the base tube and is sleeved on described the
The second case on the outside of two electrodes, the second electrode and base tube are laid in coaxial, the material of second case and described the
The material of two electrodes is identical.
The method that a kind of above-mentioned use electric resistance welding produces half metallurgy type metal composite pipe, it is characterized in that：The first electrode
It is cylinder electrode with the second electrode, first case and second case are cone and the diameter of the two
It is gradually reduced from the inside to the outside；First case and the second case are laid with the mechanical metal composite pipe in coaxial,
The envelope that first case and the second case are blocked by coniform shell and to the bottom opening of the coniform shell
Closure plate is constituted；The plugging plate of first case is arranged on the middle part of the first electrode, and the plugging plate of first case
Middle part is provided with the installing port installed for the first electrode；The plugging plate of second case is arranged in the second electrode
The installing port installed for the second electrode is provided with the middle part of portion, and the plugging plate of second case.
The method that a kind of above-mentioned use electric resistance welding produces half metallurgy type metal composite pipe, it is characterized in that：The first electrode
It is integrated with the first case processing and fabricating, and the second electrode is integrated with the second case processing and fabricating；It is described
First electrode is identical with the material of the second electrode；The material of the first electrode be copper, cadmium copper, silver-bearing copper, chromium-copper, zirconium copper,
Chromium silver-bearing copper or chromium magnalium copper.
The method that a kind of above-mentioned use electric resistance welding produces half metallurgy type metal composite pipe, it is characterized in that：Carried out in step 2
Before base tube is combined with bushing pipe assembling and machinery, also need to clear up the inner surface of base tube and the outer surface of bushing pipe respectively；Step
Carry out before electric resistance welding preparation, also needed to installing the resistance welding electrode on base tube and on overhanging section of bushing pipe in rapid three
Installation site carries out grinding process respectively；
Before progress base tube is combined with bushing pipe assembling and machinery in step 2, the inner surface and/or bushing pipe to base tube are also needed
Outer surface carry out blasting treatment.
The method that a kind of above-mentioned use electric resistance welding produces half metallurgy type metal composite pipe, it is characterized in that：Used in step 4
When resistance welder is welded to the base tube in the mechanical metal composite pipe and bushing pipe, welded using dot welding method；Weldering
After connecing, multiple nuggets are formed on the contact surface between the base tube and bushing pipe.
The method that a kind of above-mentioned use electric resistance welding produces half metallurgy type metal composite pipe, it is characterized in that：Described in step one
Base tube is carbon steel base tube, and the bushing pipe is corrosion resistant alloy bushing pipe；When carrying out electric resistance welding in step 4, welding current is 150A
~30000A.
The method that a kind of above-mentioned use electric resistance welding produces half metallurgy type metal composite pipe, it is characterized in that：Carried out in step 5
Before following process, resistance welder is first closed, and the first welding tooling and the second welding tooling are removed；It is right in step 5
The half metallurgy type metal composite pipe is carried out before pipe end soldering and sealing or pipe end built-up welding, and the half metallurgy type metal composite pipe need to be entered
Row endoscopy；Pipe end soldering and sealing or pipe end heap postwelding are carried out to the half metallurgy type metal composite pipe in step 5, need to also be
The tube end maching ring groove of the half metallurgy type metal composite pipe.
The method that a kind of above-mentioned use electric resistance welding produces half metallurgy type metal composite pipe, it is characterized in that：To institute in step 5
State before the progress pipe end soldering and sealing of half metallurgy type metal composite pipe or pipe end built-up welding, the half metallurgy type metal composite pipe need to be carried out
Sampling inspection, the sampling inspection carried out includes bond strength and examined and base lining combination interface metal lographic examination；It is follow-up in step 5
After machining, also need to carry out radiographic inspection and hydraulic pressure test to the half metallurgy type metal composite pipe finished product.
The present invention has advantages below compared with prior art：
1st, method and step is simple, reasonable in design and realizes that conveniently, input cost is relatively low.
2nd, process it is reasonable in design and realize it is convenient, mainly include base tube and bushing pipe processing, base tube and bushing pipe assembling and
The steps such as mechanical compound, welding tooling installation (i.e. electric resistance welding prepares), electric resistance welding, following process and related check.
3rd, the resistance welding tool structure used is simple, reasonable in design and processing and fabricating and installation laying are convenient, use
Effect is good, during electric resistance welding, causes the gap between base tube and bushing pipe to form one and outer by resistance welding frock
The cavity of boundary's relative insulation, can be effectively ensured electric resistance welding quality, and can effectively strengthen the bond strength that base serves as a contrast combination interface；
Meanwhile, the two electric resistance welding electricity of the first welding tooling and the second welding tooling in resistance welding frock respectively as resistance welder
Pole is used, and has the advantages that dismounting simplicity, easy-to-connect, using effect are good.
4th, process is reasonable in design, using effect is good and practical value is high, takes full advantage of mechanical metal composite pipe
Middle base tube is to the normal pressure and contact resistance of bushing pipe, and without additionally apply precompressed.Due to typical mechanical metal composite
Pipe is usually the carbon steel pipe by high intensity as playing the base tube of mechanical support and the stainless steel of excellent corrosion-proof performance or anti-corrosion
Alloy bushing pipe is constituted.The deformation that bushing pipe occurs is based on being plastically deformed, and base tube deformation is then based on elastic deformation.After compound, lining
Pipe by base tube normal pressure, so as to realize that machinery is compound.The compound contact surface of this machinery be exist on microcosmic it is many recessed
The contact of two planes of male structure, as shown in Figure 3.The compound preceding blasting treatment to base tube and/or bushing pipe is especially assembled, more
Plus increase the bumps of base tube inner surface and/or bushing pipe outer surface；This has resulted in mechanical contact surface after being combined
Full connected, but it is microcosmic on localized contact, that is, there is contact resistance.Electric resistance welding be substantially it is a kind of using two or two with
On conductor between contact resistance, under certain pressure effect, realize that local pyrexia, fusing material realize welding with being connected
Method.As can be seen here, the loading characteristic of mechanical metal composite pipe is not only that electric resistance welding provides normal pressure, Er Qieti
The contact resistance supplied between base lining, this just provides prerequisite for electric resistance welding.When high current moment by base serves as a contrast contact surface
When, because base serve as a contrast between contact resistance presence cause actual contact on contact surface part generate heat and melt, finally realize base tube and
The local metallurgical binding of bushing pipe, is also formed so-called " half metallurgy type metal composite pipe ".
5th, welding quality height, using effect are good, and the bond strength between base tube and bushing pipe is high and high in machining efficiency, plus
Working medium amount is easy to ensure.The present invention is the normal pressure and contact resistance between a kind of lining using mechanical metal composite pipe base,
Instantaneous large-current is passed through to mechanical multiple tube base lining combination interface using resistance welding technology, makes the partial contact zones on microcosmic
Microcosmic nugget is formed, so as to manufacture the method for half metallurgy type metal composite pipe.Therefore, mechanical multiple tube can be made using electric resistance welding
Mechanical bond between base lining is changed into the local metallurgical binding (forming half metallurgy type metal composite pipe) of microcosmos area, improves base lining
Bond strength, so as to solve the not high problem of bond strength between mechanical multiple tube base lining.And with the complexity of metallurgy type multiple tube
Technique is compared, and the present invention is with technique is simple, with low cost, production efficiency is high, low power consumption and other advantages.Meanwhile, using the present invention
The original mechanics of multiple tube and corrosion resisting property are not destroyed.Although very high in the instantaneous temperature of contact surface, because electric resistance welding is logical
The electric time is very of short duration, and generally a few tens of milliseconds is between hundreds of milliseconds, therefore the nugget size formed in microcosmos area is non-
It is often small, therefore the overall mechanical properties and corrosive nature of base tube and bushing pipe will not be impacted.
6th, widely applicable and popularizing application prospect extensively, can be suitably used for petroleum gas, chemical industry, electric power, water delivery, food etc.
Metal composite pipe processing in field, makes mechanical metal composite pipe form half metallurgy type metal composite by electric resistance welding mode
Pipe.
In summary, the inventive method step is simple, reasonable in design and realizes that convenient, welding quality height, using effect are good,
Bond strength in half metallurgy type metal composite pipe of machine-shaping between base tube and bushing pipe is high and high in machining efficiency, processing
Quality is easy to ensure, can effectively solve existing machinery formula composite bimetal pipe and low, bulge failure of base lining bond strength etc. easily occur
Mass defect problem.Meanwhile, compared to metallurgy type metal composite pipe processing method exist complex process, processing efficiency it is relatively low,
The high shortcoming of cost, the present invention is with input cost is low, technical process is simple, be easily achieved, production efficiency is high, energy consumption is low excellent
Point.
Below by drawings and examples, technical scheme is described in further detail.
Brief description of the drawings
Method flow block diagram when Fig. 1 is the present invention half metallurgy type metal composite pipe of production.
Electric resistance welding view when Fig. 2 is the present invention half metallurgy type metal composite pipe of production.
Fig. 3 serves as a contrast the microstructure schematic diagram of contact surface for base in the mechanical metal composite pipe of the present invention.
Fig. 4 is the microstructure schematic diagram of base lining contact surface in half metallurgy type metal composite pipe of the invention.
Description of reference numerals:
1-base tube；2-the first welding tooling；3-bushing pipe；
4-the second welding tooling；5-resistance welder；6-nugget.
Embodiment
Embodiment 1
The method that a kind of use electric resistance welding as shown in Figure 1 produces half metallurgy type metal composite pipe, comprises the following steps：
Step 1: base tube is processed with bushing pipe：The base tube 1 and bushing pipe 3 of produced metal composite pipe are processed respectively, institute
The length for stating bushing pipe 3 is more than the length of base tube 1；
Step 2: base tube is assembled with bushing pipe and machinery is compound：Bushing pipe 3 described in step one is coaxially loaded in base tube 1, and
The two ends of bushing pipe 3 are made to extend out to the outside of base tube 1；Base tube 1 is complex as with bushing pipe 3 using bimetal tube mechanical complex method again
One, forms mechanical metal composite pipe；The section that the two ends of bushing pipe 3 extend out to the outside of base tube 1 is overhanging section；The machine
Base serves as a contrast the microstructure of contact surface in tool formula metal composite pipe, refers to Fig. 3；
Step 3: electric resistance welding prepares：Two resistance welding electrodes of resistance welder 5 are separately mounted to described mechanical
Metal composite pipe two ends, one of them described resistance welding electrode is arranged on overhanging section of the one end of bushing pipe 3, and another described electricity
Welding resistance electrode is arranged on one end of base tube 1；
Step 4: electric resistance welding：Using the base tube 1 in 5 pairs of mechanical metal composite pipes of resistance welder and bushing pipe 3
Welded, obtain half metallurgy type metal composite pipe；
Step 5：Following process：Bushing pipe 3 in half metallurgy type metal composite pipe described in step 4 is extend out to outside base tube 1
The section of side is cut off, then carries out pipe end soldering and sealing or pipe end built-up welding to the half metallurgy type metal composite pipe, obtains half metallurgical
Formula metal composite pipe finished product.
In the present embodiment, base tube 1 described in step one is carbon steel base tube, and the bushing pipe 3 is corrosion resistant alloy bushing pipe.Also,
Length L=15mm~200mm of section of stretching out described in step 2.Wherein, the material of corrosion resistant alloy bushing pipe is stainless steel, Ni-based conjunction
Gold or Cu alloy material.
In the present embodiment, the specification for processing half metallurgy type metal composite pipe finished product is Φ 114 × (10+2) mm, the base
The material of pipe 1 is L360QS carbon steels, and the external diameter of base tube 1 is Φ 114mm, length is 2m and its wall thickness is 10mm；The bushing pipe 3
Material is 316L stainless steels and its wall thickness is 2mm, and the external diameter of the bushing pipe 3 is Φ 90mm and its length is 2.2m.
When being processed in step one to base tube 1 and bushing pipe 3, length big 2L of the length than base tube 1 of the bushing pipe 3.It is real
, can according to specific needs when border is processed, the value size to L is adjusted accordingly.Also, the external diameter of the base tube 1 is bigger, L
Value it is bigger.Also, the external diameter of the bushing pipe 3 is less than the internal diameter of base tube 1, gap between the base tube 1 and bushing pipe 3 according to
The matching requirements of common metal multiple tube are determined.In the present embodiment, the L=100mm described in step 2.
In the present embodiment, as shown in Fig. 2 two resistance welding electrodes are respectively the He of the first welding tooling 2 in step 3
Second welding tooling 4, the welding tooling 4 of the first welding tooling 2 and second composition resistance welding frock and the two respectively with electricity
Two power output ends connection of welding binder 5；When carrying out electric resistance welding preparation in step 3, the resistance welder is put into
Row is installed.
Described in first welding tooling 2 includes first electrode of the gripping sleeve on overhanging section of bushing pipe 3 and is sleeved on
The first case on the outside of first electrode, the first electrode and bushing pipe 3 in coaxial laying, the material of first case with it is described
The material of first electrode is identical；Second welding tooling 4 includes second electrode of the gripping sleeve on base tube 1 and is sleeved on institute
The second case on the outside of second electrode is stated, the second electrode is laid with base tube 1 in coaxial, the material of second case and institute
The material for stating second electrode is identical.
When resistance welder threading row installation is fixedly mounted reality, it need to ensure connection reliably.The present embodiment
In, two power output ends of the welding tooling 4 of the first welding tooling 2 and second by power line respectively with resistance welder 5
Connection.
In the present embodiment, before progress base tube is combined with bushing pipe assembling and machinery in step 2, the interior table to base tube 1 is also needed
Face and the outer surface of bushing pipe 3 are cleared up respectively, it is ensured that the contact surface (contact i.e. between base tube 1 and bushing pipe 3 that base lining is combined
Face) it is clean.
Before progress base tube is combined with bushing pipe assembling and machinery in step 2, the inner surface and/or bushing pipe to base tube 1 are also needed
3 outer surface carries out blasting treatment.In the present embodiment, blasting treatment only is carried out to the inner surface of base tube 1.
In the present embodiment, when clearing up the inner surface of base tube 1, the inner surface of base tube 1 need to be carried out derusting by sandblasting and
Dehumidifying and dust removal process, and dehumidified and dust removal process using air-heater.When clearing up the outer surface of bushing pipe 3, need pair
The outer surface of bushing pipe 3 carries out oil removing and dust removal process.Also, when carrying out oil removing and dust removal process to the outer surface of bushing pipe 3, use
Acetone cleans the outer surface of bushing pipe 3.When actual use, it would however also be possible to employ other cleaning agents are cleaned.After the completion of cleaning, it is ensured that
The inner surface of the base tube 1 and outer surface of bushing pipe 3 is rustless, oil-free and free from dust.
During actual processing, the machinery complex method of bimetal tube described in step 2 is spinning process, hydraulic expanding-forming method or detonation
Composite algorithm.Wherein, hydraulic expanding-forming method and detonation composite algorithm are that conventional bimetal tube machinery well known to those skilled in the art is multiple
Conjunction method, thus practical operation is easy.During actual processing, it would however also be possible to employ the mechanical complex method of other types of bimetal tube.
In the present embodiment, base tube 1 is complex as a whole with bushing pipe 3 using hydraulic expanding-forming method in step 2, and specifically adopts
It is combined with hydraulic pressure composite algorithm.
In the present embodiment, first electrode described in step 3 and the second electrode are cylinder electrode, and described first
Case and second case are cone and the diameter of the two is gradually reduced from the inside to the outside；First case and second
Case with the mechanical metal composite pipe in it is coaxial lay, first case and the second case by coniform shell with
The plugging plate composition blocked to the bottom opening of the coniform shell；The plugging plate of first case is arranged on described
The installing port installed for the first electrode is provided with the middle part of the middle part of first electrode, and the plugging plate of first case；It is described
The plugging plate of second case is arranged in the middle part of the middle part of the second electrode, and the plugging plate of second case and is provided with for described
The installing port that second electrode is installed.
Also, the length of the first electrode and second electrode is 10mm~150mm.Meanwhile, first case
1.5 times~3 times of a diameter of first electrode external diameter of plugging plate, a diameter of second electricity of plugging plate of second case
1.5 times of pole external diameter~3 times.During actual processing, can according to specific needs, to the length of the first electrode and second electrode with
And the diameter of the plugging plate of first case and the second case is adjusted respectively.
Carry out before electric resistance welding preparation, also needed on base tube 1 and described in overhanging section of upper installation of bushing pipe 3 in step 3
The installation site of resistance welding electrode carries out grinding process respectively.Specifically to the first welding tooling 2 on overhanging section of bushing pipe 3
The installation site of installation site and the second welding tooling 4 on base tube 1 carries out grinding process respectively.
In the present embodiment, to installation site of first welding tooling 2 on overhanging section of bushing pipe 3 and the second welding tooling 4
When installation site on base tube 1 carries out grinding process respectively, the first welding tooling 2 is installed overhanging section of bushing pipe 3 and the
Grinding process is carried out in the range of one end 50mm for the base tube 1 that two welding toolings 4 are installed, the first electrode and second electrode
Length is no more than 50mm.
In the present embodiment, first electrode described in step 3 is integrated with the first case processing and fabricating, and described
Two electrodes are integrated with the second case processing and fabricating.
The first electrode is identical with the material of the second electrode and its material be copper, cadmium copper, silver-bearing copper, chromium-copper, zirconium copper,
Chromium silver-bearing copper or chromium magnalium copper., can according to specific needs, to the first welding tooling 2 and the material of the second welding tooling 4 during actual processing
Matter is adjusted accordingly.In the present embodiment, the material of the first electrode and the second electrode is red copper.
, can according to specific needs when actual use, the material to the first electrode and the second electrode is carried out accordingly
Adjustment.
In the present embodiment, in the resistance welding frock installation process, the first welding tooling 2 and the second Welder need to be ensured
Fill 4 firm, firm to install so that between the first welding tooling 2 and bushing pipe 3 and between the second welding tooling 4 and base tube 1
It is reliably connected, the first welding tooling 2 and the second welding tooling 4 need to be reliably connected with two power output ends of resistance welder 5, but
Any connection can not be carried out between first welding tooling 2 and the second welding tooling 4.It should be noted that：First welding tooling 2
It can not be grounded with the second welding tooling 4, and two electricity of the first welding tooling 2 and the second welding tooling 4 and resistance welder 5
Electric power loop between source output terminal can not be grounded, only the earthing of casing of resistance welder 5.
The base tube 1 and bushing pipe in 5 pairs of the resistance welder mechanical metal composite pipe are used in the present embodiment, in step 4
3 when being welded, and is welded using dot welding method；After welding, form multiple on the contact surface between the base tube 1 and bushing pipe 3
Nugget 6.
Correspondingly, the resistance welder 5 is resistance spot weld welding machine.Base is served as a contrast in half metallurgy type metal composite pipe of welding fabrication
The microstructure of contact surface, refers to Fig. 4.Wherein, each nugget 6 is respectively positioned on bossing and the appearance of bushing pipe 3 on the inner surface of base tube 1
The contact position between bossing on face.
In the present embodiment, when carrying out electric resistance welding in step 4, by the negative electricity of the first welding tooling 2 and resistance welder 5
Source output terminal is connected, and the second welding tooling 4 is connected with the positive electricity source output terminal of resistance welder 5.
When actual use, the first welding tooling 2 can also be connected with the positive electricity source output terminal of resistance welder 5, and by
Two welding toolings 4 are connected with the negative electricity source output terminal of resistance welder 5.
During actual progress electric resistance welding, welding current is 150A~30000A, and weld interval is to be not more than conduction time
900ms.Also, weld interval is 10ms~900ms.
In the present embodiment, when carrying out electric resistance welding in step 4, welding current is 3500A, and weld interval is 500ms.
During actual welding, welding current and weld interval can be adjusted accordingly according to specific needs.
Electricity is carried out in the characteristics of relative to needing to apply pressure by electrode after the workpiece combination of electric resistance welding spot welding, step 4
Welding resistance welding method is differed only in conventional resistance spot weld soldering method, without carrying out precompressed to workpiece before energization.Due to
Base tube 1 and bushing pipe 3 carry out machinery and are combined in advance, thus it is indirectly that two to-be-welded pieces (i.e. base tube 1 and bushing pipe 3) can be effectively ensured
Touch good so that whole welding process is more simple, realize that convenient and welding quality is easily controllable.
Carried out in the present embodiment, in step 5 before following process, first close resistance welder 5, and to the first welding tooling 2
Removed with the second welding tooling 4.The half metallurgy type metal composite pipe is carried out before pipe end soldering and sealing or pipe end built-up welding, needed
Endoscopy is carried out to the half metallurgy type metal composite pipe.Also, pipe end is carried out to the half metallurgy type metal composite pipe
Soldering and sealing or pipe end heap postwelding, need to also the half metallurgy type metal composite pipe tube end maching ring groove, to facilitate described half
Docking between metallurgy type metal composite pipe.After the completion of following process, also need to enter the half metallurgy type metal composite pipe finished product
Row radiographic inspection and hydraulic pressure test.
The half metallurgy type metal composite pipe is carried out in the present embodiment, in step 5 pipe end soldering and sealing or pipe end built-up welding it
Before, need to be sampled inspection to the half metallurgy type metal composite pipe, the sampling inspection carried out include bond strength examine and
Base serves as a contrast combination interface metal lographic examination, and this two inspections are destructive testing.
In the present embodiment, the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength examine,
The result of the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is qualified, and base serves as a contrast the combination of combination interface
Intensity increases more than 5 times than the bond strength of mechanical metal composite pipe.
Embodiment 2
In the present embodiment, as different from Example 1：The specification for processing half metallurgy type metal composite pipe finished product is Φ
610×(20+2)mm；The material of base tube 1 described in step one is L485 carbon steels, and the external diameter of base tube 1 is that Φ 610mm, length are 3m
And its wall thickness is 20mm；The material of the bushing pipe 3 is 316L stainless steels and its wall thickness is 2mm, and the external diameter of the bushing pipe 3 is Φ
560mm and its length are 3.3m；L=150mm described in step 2；Welding current is 8000A and weld interval in step 4
For 400ms.
In the present embodiment, remaining method and step and parameter are same as Example 1.
In the present embodiment, the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength examine,
The result of the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is qualified, and base serves as a contrast the combination of combination interface
Intensity increases more than 5 times than the bond strength of mechanical metal composite pipe.
Embodiment 3
In the present embodiment, as different from Example 1：The specification for processing half metallurgy type metal composite pipe finished product is Φ 76
×(7+2)mm；The material of base tube 1 described in step one is 20G carbon steels, the external diameter of base tube 1 be Φ 76mm, length be 10m and its
Wall thickness is 7mm；The material of the bushing pipe 3 is 2205 two phase stainless steels and its wall thickness is 2mm, and the external diameter of the bushing pipe 3 is Φ
60mm and its length are 10.16m；L=80mm described in step 2；Welding current is 14500A and weld interval in step 4
For 200ms.
In the present embodiment, remaining method and step and parameter are same as Example 1.
In the present embodiment, the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength examine,
The result of the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is qualified, and base serves as a contrast the combination of combination interface
Intensity increases more than 5 times than the bond strength of mechanical metal composite pipe.
Embodiment 4
In the present embodiment, as different from Example 1：The specification for processing half metallurgy type metal composite pipe finished product is Φ
168×(12.7+3)mm；The material of base tube 1 described in step one is 20G carbon steels, and the external diameter of base tube 1 is that Φ 168mm, length are
2m and its wall thickness are 12.7mm；The material of the bushing pipe 3 is 825 nickel-base alloys and its wall thickness is 3mm, the external diameter of the bushing pipe 3
For Φ 139mm and its length is 2.18m；L=90mm described in step 2；Welding current is 4800A and welding in step 4
Time is 350ms.
In the present embodiment, remaining method and step and parameter are same as Example 1.
In the present embodiment, the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength examine,
The result of the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is qualified, and base serves as a contrast the combination of combination interface
Intensity increases more than 5 times than the bond strength of mechanical metal composite pipe.
Embodiment 5
In the present embodiment, as different from Example 1：The material of bushing pipe 3 described in step one is copper alloy, in step 4
Welding current is 2500A and weld interval is 400ms.
In the present embodiment, remaining method and step and parameter are same as Example 1.
In the present embodiment, the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength examine,
The result of the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is qualified, and base serves as a contrast the combination of combination interface
Intensity increases more than 5 times than the bond strength of mechanical metal composite pipe.
Embodiment 6
In the present embodiment, as different from Example 1：The specification for processing half metallurgy type metal composite pipe finished product is Φ 60
×(7+2)mm；The material of base tube 1 described in step one is 20G carbon steels, the external diameter of base tube 1 be Φ 60mm, length be 10m and its
Wall thickness is 7mm；The material of the bushing pipe 3 is 316L stainless steels and its wall thickness is 2mm, the external diameter of the bushing pipe 3 for Φ 43mm and
Its length is 10.4m；L=200mm described in step 2；Welding current is 20500A in step 4 and weld interval is
350ms。
In the present embodiment, remaining method and step and parameter are same as Example 1.
In the present embodiment, the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength examine,
The result of the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is qualified, and base serves as a contrast the combination of combination interface
Intensity increases more than 5 times than the bond strength of mechanical metal composite pipe.
Embodiment 7
In the present embodiment, as different from Example 6：The length of the base tube 1 is 0.08m；The length of bushing pipe 3 is
0.11m；L=15mm described in step 2；Welding current is 150A in step 4 and weld interval is 550ms.
In the present embodiment, remaining method and step and parameter are same as Example 6.
In the present embodiment, the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength examine,
The result of the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is qualified, and base serves as a contrast the combination of combination interface
Intensity increases more than 5 times than the bond strength of mechanical metal composite pipe.
Embodiment 8
In the present embodiment, as different from Example 2：Welding current is 5000A in step 4 and weld interval is
900ms。
In the present embodiment, remaining method and step and parameter are same as Example 2.
In the present embodiment, the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength examine,
The result of the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is qualified, and base serves as a contrast the combination of combination interface
Intensity increases more than 5 times than the bond strength of mechanical metal composite pipe.
Embodiment 9
In the present embodiment, as different from Example 2：Welding current is 30000A in step 4 and weld interval is
10ms。
In the present embodiment, remaining method and step and parameter are same as Example 2.
In the present embodiment, the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength examine,
The result of the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is qualified, and base serves as a contrast the combination of combination interface
Intensity increases more than 5 times than the bond strength of mechanical metal composite pipe.
Embodiment 10
In the present embodiment, as different from Example 2：Welding current is 25000A in step 4 and weld interval is
60ms。
In the present embodiment, remaining method and step and parameter are same as Example 2.
In the present embodiment, the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength examine,
The result of the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is qualified, and base serves as a contrast the combination of combination interface
Intensity increases more than 5 times than the bond strength of mechanical metal composite pipe.
Embodiment 11
In the present embodiment, as different from Example 2：Welding current is 20000A in step 4 and weld interval is
100ms。
In the present embodiment, remaining method and step and parameter are same as Example 2.
In the present embodiment, the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength examine,
The result of the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is qualified, and base serves as a contrast the combination of combination interface
Intensity increases more than 5 times than the bond strength of mechanical metal composite pipe.
Embodiment 12
In the present embodiment, as different from Example 2：Welding current is 10000A in step 4 and weld interval is
250ms。
In the present embodiment, remaining method and step and parameter are same as Example 2.
In the present embodiment, the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength examine,
The result of the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is qualified, and base serves as a contrast the combination of combination interface
Intensity increases more than 5 times than the bond strength of mechanical metal composite pipe.
Embodiment 13
In the present embodiment, as different from Example 3：Welding current is 9500A in step 4 and weld interval is
700ms。
In the present embodiment, remaining method and step and parameter are same as Example 3.
In the present embodiment, the endoscopy of half metallurgy type metal composite pipe finished product of machine-shaping, bond strength examine,
The result of the metal lographic examination of base lining combination interface, radiographic inspection and hydraulic pressure test is qualified, and base serves as a contrast the combination of combination interface
Intensity increases more than 5 times than the bond strength of mechanical metal composite pipe.
It is described above, only it is presently preferred embodiments of the present invention, not the present invention is imposed any restrictions, it is every according to the present invention
Any simple modification, change and equivalent structure change that technical spirit is made to above example, still fall within skill of the present invention
In the protection domain of art scheme.
Claims (10)
1. a kind of method that use electric resistance welding produces half metallurgy type metal composite pipe, it is characterised in that this method includes following step
Suddenly：
Step 1: base tube is processed with bushing pipe：The base tube (1) and bushing pipe (3) of produced metal composite pipe are processed respectively, institute
The length for stating bushing pipe (3) is more than the length of base tube (1)；
Step 2: base tube is assembled with bushing pipe and machinery is compound：Bushing pipe described in step one (3) is coaxially loaded in base tube (1), and
The two ends of bushing pipe (3) are made to extend out on the outside of base tube (1)；The mechanical complex method of bimetal tube is used again by base tube (1) and bushing pipe
(3) it is complex as a whole, forms mechanical metal composite pipe；The section that bushing pipe (3) two ends are extend out on the outside of base tube (1) is
Overhanging section；
Step 3: electric resistance welding prepares：Two resistance welding electrodes of resistance welder (5) are separately mounted to the mechanical gold
Belong to multiple tube two ends, one of them described resistance welding electrode is arranged on overhanging section of bushing pipe (3) one end, and another described electricity
Welding resistance electrode is arranged on one end of base tube (1)；
Step 4: electric resistance welding：Using resistance welder (5) to the base tube (1) and bushing pipe in the mechanical metal composite pipe
(3) welded, obtain half metallurgy type metal composite pipe；
Step 5：Following process：Base tube (1) is extend out to outside to bushing pipe (3) in half metallurgy type metal composite pipe described in step 4
The section of side is cut off, then carries out pipe end soldering and sealing or pipe end built-up welding to the half metallurgy type metal composite pipe, obtains half metallurgical
Formula metal composite pipe finished product.
2. producing the method for half metallurgy type metal composite pipe according to a kind of use electric resistance welding described in claim 1, its feature exists
In：The machinery complex method of bimetal tube described in step 2 is spinning process, hydraulic expanding-forming method or detonation composite algorithm, the section of stretching out
Length L=15mm~200mm.
3. the method for half metallurgy type metal composite pipe, its feature are produced according to a kind of use electric resistance welding described in claim 1 or 2
It is：Two resistance welding electrodes are respectively the first welding tooling (2) and the second welding tooling (4), described in step 3
One welding tooling (2) and the second welding tooling (4) composition resistance welding frock and the two two electricity respectively with resistance welder (5)
Source output terminal is connected；When carrying out electric resistance welding preparation in step 3, row is put into the resistance welder and installed；
Described in first welding tooling (2) includes first electrode of the gripping sleeve on overhanging section of bushing pipe (3) and is sleeved on
The first case on the outside of first electrode, the first electrode is laid with bushing pipe (3) in coaxial, the material of first case and institute
The material for stating first electrode is identical；Second welding tooling (4) includes second electrode and set of the gripping sleeve on base tube (1)
The second case on the outside of the second electrode, the second electrode is laid with base tube (1) in coaxial, second case
Material is identical with the material of the second electrode.
4. producing the method for half metallurgy type metal composite pipe according to a kind of use electric resistance welding described in claim 3, its feature exists
In：The first electrode and the second electrode are cylinder electrode, and first case and second case are circle
The taper and diameter of the two is gradually reduced from the inside to the outside；First case and the second case are multiple with the mechanical metal
Pipe is closed in coaxial laying, first case and the second case are opened by coniform shell and to the bottom of the coniform shell
The plugging plate composition that mouth is blocked；The plugging plate of first case is arranged on the middle part of the first electrode, and described the
The installing port installed for the first electrode is provided with the middle part of the plugging plate of one case；The plugging plate of second case is arranged on institute
State the installing port for being provided with and being installed for the second electrode in the middle part of the middle part of second electrode, and the plugging plate of second case.
5. producing the method for half metallurgy type metal composite pipe according to a kind of use electric resistance welding described in claim 3, its feature exists
In：The first electrode is integrated with the first case processing and fabricating, and the second electrode is processed with second case
Making is integrated；The first electrode is identical with the material of the second electrode；The material of the first electrode be copper, cadmium copper,
Silver-bearing copper, chromium-copper, zirconium copper, chromium silver-bearing copper or chromium magnalium copper.
6. the method for half metallurgy type metal composite pipe, its feature are produced according to a kind of use electric resistance welding described in claim 1 or 2
It is：Before progress base tube is combined with bushing pipe assembling and machinery in step 2, the inner surface and bushing pipe (3) to base tube (1) are also needed
Outer surface cleared up respectively；Carry out before electric resistance welding preparation, also needed on base tube (1) and bushing pipe (3) in step 3
The overhanging section of upper installation site for installing the resistance welding electrode carry out grinding process respectively；
Before progress base tube is combined with bushing pipe assembling and machinery in step 2, the inner surface and/or bushing pipe to base tube (1) are also needed
(3) outer surface carries out blasting treatment.
7. the method for half metallurgy type metal composite pipe, its feature are produced according to a kind of use electric resistance welding described in claim 1 or 2
It is：The base tube (1) in the mechanical metal composite pipe and bushing pipe (3) are welded using resistance welder (5) in step 4
When connecing, welded using dot welding method；After welding, multiple nuggets are formed on the contact surface between the base tube (1) and bushing pipe (3)
(6)。
8. producing the method for half metallurgy type metal composite pipe according to a kind of use electric resistance welding described in claim 7, its feature exists
In：Base tube described in step one (1) is carbon steel base tube, and the bushing pipe (3) is corrosion resistant alloy bushing pipe；Electric resistance welding is carried out in step 4
During welding, welding current is 150A~30000A.
9. producing the method for half metallurgy type metal composite pipe according to a kind of use electric resistance welding described in claim 3, its feature exists
In：Carried out in step 5 before following process, first close resistance welder (5), and to the first welding tooling (2) and the second Welder
Dress (4) is removed；Before carrying out pipe end soldering and sealing or pipe end built-up welding in step 5 to the half metallurgy type metal composite pipe, need pair
The half metallurgy type metal composite pipe carries out endoscopy；Pipe end is carried out to the half metallurgy type metal composite pipe in step 5
Soldering and sealing or pipe end heap postwelding, need to also the half metallurgy type metal composite pipe tube end maching ring groove.
10. producing the method for half metallurgy type metal composite pipe according to a kind of use electric resistance welding described in claim 1 or 2, it is special
Levy and be：The half metallurgy type metal composite pipe is carried out in step 5 before pipe end soldering and sealing or pipe end built-up welding, needed half-and-half metallurgical
Formula metal composite pipe is sampled inspection, and the sampling inspection carried out includes bond strength and examined and base lining combination interface metallographic inspection
Test；In step 5 after the completion of following process, also need to carry out radiographic inspection and hydraulic pressure to the half metallurgy type metal composite pipe finished product
Test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510579275.XA CN105081541B (en) | 2015-09-11 | 2015-09-11 | A kind of method that use electric resistance welding produces half metallurgy type metal composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510579275.XA CN105081541B (en) | 2015-09-11 | 2015-09-11 | A kind of method that use electric resistance welding produces half metallurgy type metal composite pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105081541A CN105081541A (en) | 2015-11-25 |
| CN105081541B true CN105081541B (en) | 2017-09-12 |
Family
ID=54563357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510579275.XA Active CN105081541B (en) | 2015-09-11 | 2015-09-11 | A kind of method that use electric resistance welding produces half metallurgy type metal composite pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105081541B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105880816A (en) * | 2016-06-16 | 2016-08-24 | 西北工业大学 | Sleeved pipe resistance welding vacuum packaging method |
| CN107030359B (en) * | 2017-06-01 | 2020-01-14 | 中国石油大学(华东) | Bimetal mechanical composite pipe welding process |
| CN107962311B (en) * | 2017-11-29 | 2020-05-19 | 郑博元 | Preparation method of bimetal composite inner anticorrosive pipe |
| CN111590180B (en) * | 2020-06-23 | 2022-02-18 | 爱美达（深圳）热能系统有限公司 | Resistance welding equipment and welding method of heat pipe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2916185Y (en) * | 2006-06-16 | 2007-06-27 | 春兰(集团)公司 | Air intake and exhaust pipe for indoor air conditioner compressor |
| WO2008016345A2 (en) * | 2006-07-28 | 2008-02-07 | The Regents Of The University Of California | Joined concentric tubes |
| CN101334119A (en) * | 2007-06-29 | 2008-12-31 | 中国石油天然气集团公司 | Novel dual metal composite pipes and preparation method |
| CN101574852A (en) * | 2009-06-12 | 2009-11-11 | 龚畅 | Production equipment of steel-plastic reinforced composite pipe |
| CN103433636A (en) * | 2013-08-22 | 2013-12-11 | 唐勇 | Method for manufacturing thermometal metallurgy composite tube in pressure welding composite mode |
-
2015
- 2015-09-11 CN CN201510579275.XA patent/CN105081541B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2916185Y (en) * | 2006-06-16 | 2007-06-27 | 春兰(集团)公司 | Air intake and exhaust pipe for indoor air conditioner compressor |
| WO2008016345A2 (en) * | 2006-07-28 | 2008-02-07 | The Regents Of The University Of California | Joined concentric tubes |
| CN101334119A (en) * | 2007-06-29 | 2008-12-31 | 中国石油天然气集团公司 | Novel dual metal composite pipes and preparation method |
| CN101574852A (en) * | 2009-06-12 | 2009-11-11 | 龚畅 | Production equipment of steel-plastic reinforced composite pipe |
| CN103433636A (en) * | 2013-08-22 | 2013-12-11 | 唐勇 | Method for manufacturing thermometal metallurgy composite tube in pressure welding composite mode |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105081541A (en) | 2015-11-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105081541B (en) | A kind of method that use electric resistance welding produces half metallurgy type metal composite pipe | |
| CN105945393B (en) | One kind is used for nuclear power voltage-stablizer safe end dissimilar metal pipeline built-up welding method for maintaining | |
| CN102107314B (en) | Method for overlaying wear-resistant layer of blade shroud of turbine working blade | |
| Vyas et al. | Friction welding of dissimilar joints copper-stainless steel pipe consist of 0.06 wall thickness to pipe diameter ratio | |
| CN101856758B (en) | Method for welding hard alloy steelwork and 45 steelwork | |
| CN102465287B (en) | Manufacture method for laser cladded composite pipe with three layers of metals | |
| CN108296305A (en) | A kind of manufacturing method of heavy caliber thick wall composite bimetal pipe | |
| CN105226479A (en) | A kind of preparation method of tubular type conducting rod, hydraulic bulging device and tubular type conducting rod | |
| CN111037065B (en) | Welding method for inner hole welding of tube plate of small-aperture heat exchange tube | |
| CN108788405A (en) | The tungsten argon arc welding method of austenitic heat-resistance steel | |
| CN206732355U (en) | Electromagnetic pulse welder | |
| CN105057989B (en) | A kind of manufacture method of liner two-phase stainless steel pipe | |
| CN105983752A (en) | Low-alloy steel pipe welding process | |
| CN105057852B (en) | A kind of manufacture method of 2205 dual phase steel thin walled welds pipe | |
| CN108526662A (en) | A kind of Ni-based multiple tube X grooves of heavy caliber exempt from back side argon filling welding method | |
| CN102151943B (en) | Method for overlaying cone by cobalt-chromium-tungsten hard alloy | |
| CN110560963A (en) | Production process of copper-plating-free bright welding wire | |
| CN100457354C (en) | Pile-up welding method of turbine low pressure heater pipe plate and shell, water chamber junction | |
| CN102284772B (en) | Argon arc back sealing welding method for housing of low-pressure water supply heater of third-generation nuclear power steam turbine | |
| CN215112050U (en) | Hydraulic steel pipe assembly | |
| CN105351656B (en) | A kind of mechanical multiple tube with connecting hole and preparation method thereof | |
| CN202114470U (en) | High-temperature-resistant alloy furnace tube for petrochemical industry and production line of tube row | |
| CN101670477B (en) | Welding method of sulfureted hydrogen resistant underground heat-insulated oil pipe | |
| CN113042846A (en) | Variable length vacuum induction brazing furnace | |
| CN102658418A (en) | Novel welding technology for welding water wall tube with spraying layer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |