CN109277672A - A kind of correction process of stainless steel minor diameter thin wall pipe butt welding bending deformation - Google Patents
A kind of correction process of stainless steel minor diameter thin wall pipe butt welding bending deformation Download PDFInfo
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- CN109277672A CN109277672A CN201811080376.2A CN201811080376A CN109277672A CN 109277672 A CN109277672 A CN 109277672A CN 201811080376 A CN201811080376 A CN 201811080376A CN 109277672 A CN109277672 A CN 109277672A
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- welding
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- stainless steel
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- minor diameter
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Classifications
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- 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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- 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
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
- B23K33/004—Filling of continuous seams
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
- B23K9/0282—Seam welding; Backing means; Inserts for curved planar seams for welding tube sections
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
- B23K9/323—Combined coupling means, e.g. gas, electricity, water or the like
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The present invention relates to welding technology fields; it discloses a kind of correction process of stainless steel minor diameter thin wall pipe butt welding bending deformation, the determination process of the bending inner fovea part of step 10, step 20 fill that back protects gas process, the argon arc welding of step 30 does not fill silk heating process, the water-spraying control process of step 40, the natural cooling process of step 50.The present invention realizes the correction to the bending deformation after stainless-steel thin-wall pipe welding, while ensuring that the butt weld after correction has good mechanical performance and corrosion resistance.
Description
Technical field
The present invention relates to welding technology fields, and in particular to a kind of stainless steel minor diameter thin wall pipe butt welding bending deformation
Correction process.
Background technique
Stainless steel minor diameter thin wall pipe using relatively broad, can be used as liquid transmission pipeline or heat in machinery field
Exchange pipeline etc. uses.In order to meet requirement, it is often necessary to which stainless steel tube is carried out butt welding.Due to stainless steel tube
Tube wall it is relatively thin, and there are welding deformation, girth joint of the stainless steel tube by butt welding back wall around docking is easy to cause to occur
A degree of bending, to influence the quality of product.
For example, its heating coil of cargo tank in giant chemical ship is S316L stainless-steel thin-wall pipe, using moulding bed binding side
Formula is assembled, and then carries out docking welding equipment to the stainless-steel thin-wall pipe after bend pipe, then line up be sealed and pipe in rush argon
Gas finally carries out argon arc welding.In the welding process, stainless steel is in 5000-6000 DEG C of high-temperature fusion base material and filling metal, then
Solidification is recrystallized again；Since filling metal and base material fuse and to form welding point, nozzle seam is necessarily brought to deform, and it is stainless
Steel not can be carried out firework correction because firework correction can bring weld seam carburetting, cause it is chromium depleted, to reduce pipeline joint girth joint
Corrosion resisting property.If be easy to cause tube surfaces to scratch using mechanical checkout, or because bending deformation quantity is larger can not
Full correction is in place.
Summary of the invention
To solve the above-mentioned problems, the present invention proposes a kind of school of stainless steel minor diameter thin wall pipe butt welding bending deformation
Positive technique, it is intended to realize the correction to the bending deformation after stainless-steel thin-wall pipe welding, while ensure the butt weld after correction
With good mechanical performance and corrosion resistance.Specific technical solution is as follows:
A kind of correction process of stainless steel minor diameter thin wall pipe butt welding bending deformation, comprises the technical steps that:
Step 10, the determination for being bent inner fovea part: it finds out the bending inner fovea part on thin-wall tube at butt girth welding seam, determine bending
Deflection；
Step 20 fills back protection gas: being filled with enough argon gas in the inside of thin-wall tube to form the back-protective of weld seam；
Step 30, argon arc welding do not fill silk heating: using argon arc welding, argon arc welding is utilized in the case where being not filled with argon arc welding wire
The electric arc of generation was heated along one week of butt girth welding seam；
Step 40, water-spraying control: part is carried out to the butt girth welding seam position for being bent inner fovea part peripheral region on thin-wall tube
Water-spraying control；
Step 50, natural cooling: thin-wall tube integrally naturally cools to room temperature.
In above-mentioned technical proposal, according to argon arc welding welding principle, it is inflated the back-protective of weld seam to pipe, then exists
Argon arc welding heating is carried out to commissure on the outside of pipe, is not filled silk in heating process, electric arc is generated using argon arc welding tungsten electrode and adds water cooling
Mode completes welding deformation correction.Wherein, the butt weld of thin-wall tube first carries out the part of lower concave part quickly after being evenly heated
Cooling, remaining high temperature position of butt weld is then cooling and shrinks, and the reversible deformation to lower concave part is formed, so that thin-wall tube
Bending effectively corrected.The present invention due to being heated under not silk filling state in correction course using argon arc welding, and
The argon gas protection for implementing weld seam back can be avoided the drawbacks of weld seam corrosion resistance caused by traditional firer's heating declines,
It also overcomes mechanical checkout and is easy to damage the drawbacks such as pipeline, while realizing thin-walled tube bending correction, also ensure weld seam
Quality.
As a preferred solution of the present invention, the argon arc welding of the step 30 does not fill silk in heating process, using temperature sensing
Device detects the temperature after thin-wall tube heats at the butt girth welding seam, in the water-spraying control process of the step 40, using temperature
Sensor detects the temperature at butt girth welding seam cooling after cooling, while the determination work of the bending inner fovea part according to step 10
The bending deformation quantity of thin-wall tube obtained in sequence, for the temperature of the temperature after the temperature and cooling after butt girth welding seam heating
Degree difference is controlled, to realize the curvature correction of thin-wall tube.
By using the temperature difference of temperature sensor detection commissure, be conducive to more be accurately controlled curved correction
Amount.
As a further improvement, a kind of correction work of stainless steel minor diameter thin wall pipe butt welding bending deformation of the invention
Skill further includes the step 5 before step 10 is arranged in: pre-establishing several groups by simulation test and is related to thin-wall tube specification, by argon
When the correction temperature difference of arc-welding heating and water-spraying control formation, the correcting deformed amount formed through natural cooling, heating time, cooling
Between mutual relation curve or table, the data in the relation curve or table are used to instruct the bending school of thin-wall tube
Just.
The relation curve or table of the related correcting deformed amount obtained above by simulation test have preferable versatility,
Its thin-wall tube that can be applied to different size type in production, realizes the correction of high efficiency and high quality, has good
Operating Guideline effect.
Wherein, the simulation test further includes butt girth welding seam non-destructive inspection test after calibration, mechanical property test
And corrosion resistance test.
As a preferred solution of the present invention, the argon arc welding of the step 30 does not fill silk in heating process, the work of argon arc welding
Skill parameter setting are as follows: 75~85A of electric current, 9~10V of voltage, 10~15L/min of gas flow.
Preferably, the back that fills of the step 20 is protected in gas process, and it is 15~20L/min that the flow of gas is protected at back.
Preferably, the double V-groove that the butt-welded welding groove of the thin-wall tube is 55~65 °, the thin-wall tube docking
The argon arc welding technique parameter setting of welding are as follows: 70~80A of electric current, 8~9V of voltage, 10~15L/min of gas flow, back protection
The flow of gas is 15~20L/min.
Preferably, the stainless steel minor diameter thin wall pipe is S316L thin-wall tube.
In the present invention, the temperature sensor uses infrared thermometer.
The beneficial effects of the present invention are:
First, a kind of correction process of stainless steel minor diameter thin wall pipe butt welding bending deformation of the invention, due to
It is heated under not silk filling state in correction course using argon arc welding, and implements the argon gas protection at weld seam back, can be kept away
Exempt from the drawbacks of weld seam corrosion resistance caused by traditional firer's heating declines, also overcomes mechanical checkout and be easy to damage the disadvantages such as pipeline
End also ensures the quality of weld seam while realizing thin-walled tube bending correction.
Second, the correction process of a kind of stainless steel minor diameter thin wall pipe butt welding bending deformation of the invention, by adopting
With the temperature difference of temperature sensor detection commissure, be conducive to more be accurately controlled curved correcting value.
A kind of third, the correction process of stainless steel minor diameter thin wall pipe butt welding bending deformation of the invention, passes through mould
The quasi- relation curve for testing obtained related correcting deformed amount or table have preferable versatility, can apply in production
In the thin-wall tube of different size type, the correction of high efficiency and high quality is realized, there is good Operating Guideline effect.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of stainless steel minor diameter thin wall pipe butt welding (before welding) of the invention；
Fig. 2 is a kind of structural schematic diagram of stainless steel minor diameter thin wall pipe butt welding bending deformation of the invention；
Fig. 3 is to carry out the structure of argon arc welding heating to thin-wall tube in the case where being not filled with argon arc welding wire using argon arc welding
Schematic diagram；
Fig. 4 is the structural schematic diagram of water-spraying control；
Fig. 5 is the structural schematic diagram of stainless steel minor diameter thin wall pipe after calibration.
Specific embodiment
With reference to the accompanying drawings and examples, further description of the specific embodiments of the present invention.Following embodiment is only
For clearly illustrating technical solution of the present invention, and not intended to limit the protection scope of the present invention.
Embodiment 1:
As Fig. 1 to 5 show a kind of correction work of stainless steel minor diameter thin wall pipe butt welding bending deformation of the invention
The embodiment of skill, comprises the technical steps that:
Step 10, the determination for being bent inner fovea part: it finds out the bending inner fovea part on thin-wall tube at butt girth welding seam, determine bending
Deflection；
Step 20 fills back protection gas: being filled with enough argon gas in the inside of thin-wall tube to form the back-protective of weld seam；
Step 30, argon arc welding do not fill silk heating: using argon arc welding, argon arc welding is utilized in the case where being not filled with argon arc welding wire
The electric arc of generation was heated along one week of butt girth welding seam；
Step 40, water-spraying control: part is carried out to the butt girth welding seam position for being bent inner fovea part peripheral region on thin-wall tube
Water-spraying control；
Step 50, natural cooling: thin-wall tube integrally naturally cools to room temperature.
In above-described embodiment, according to argon arc welding welding principle, the back-protective of weld seam is inflated to pipe, then in pipe
Sub- outside carries out argon arc welding heating to commissure, does not fill silk in heating process, generates electric arc using argon arc welding tungsten electrode and adds water cooling side
Formula completes welding deformation correction.Wherein, the butt weld of thin-wall tube first carries out the fast quickly cooling in part of lower concave part after being evenly heated
But, remaining high temperature position of butt weld is then cooling and shrinks, and forms the reversible deformation to lower concave part, so that thin-wall tube
Bending is effectively corrected.The present embodiment due to being heated under not silk filling state in correction course using argon arc welding, and
The argon gas protection for implementing weld seam back can be avoided the drawbacks of weld seam corrosion resistance caused by traditional firer's heating declines,
It also overcomes mechanical checkout and is easy to damage the drawbacks such as pipeline, while realizing thin-walled tube bending correction, also ensure weld seam
Quality.
As the preferred embodiment of the present embodiment, the argon arc welding of the step 30 does not fill silk in heating process, is passed using temperature
Sensor detects the temperature after thin-wall tube heats at the butt girth welding seam, in the water-spraying control process of the step 40, using temperature
Spend temperature after cooling at sensor detection butt girth welding seam cooling, while the determination of the bending inner fovea part according to step 10
The bending deformation quantity of thin-wall tube obtained in process, for the temperature after the temperature and cooling after butt girth welding seam heating
Temperature difference is controlled, to realize the curvature correction of thin-wall tube.
By using the temperature difference of temperature sensor detection commissure, be conducive to more be accurately controlled curved correction
Amount.
As a further improvement, a kind of correction of stainless steel minor diameter thin wall pipe butt welding bending deformation of the present embodiment
Technique further includes the step 5 before step 10 is arranged in: by simulation test pre-establish several groups be related to thin-wall tube specification, by
The correction temperature difference of argon arc welding heating and water-spraying control formation, the correcting deformed amount formed through natural cooling, heating time, cooling
The mutual relation curve or table of time, the data in the relation curve or table are used to instruct the bending school of thin-wall tube
Just.
The relation curve or table of the related correcting deformed amount obtained above by simulation test have preferable versatility,
Its thin-wall tube that can be applied to different size type in production, realizes the correction of high efficiency and high quality, has good
Operating Guideline effect.
Wherein, the simulation test further includes butt girth welding seam non-destructive inspection test after calibration, mechanical property test
And corrosion resistance test.
As the preferred embodiment of the present embodiment, the argon arc welding of the step 30 does not fill silk in heating process, argon arc welding
Processing parameter setting are as follows: 75~85A of electric current, 9~10V of voltage, 10~15L/min of gas flow.
Preferably, the back that fills of the step 20 is protected in gas process, and it is 15~20L/min that the flow of gas is protected at back.
Preferably, the double V-groove that the butt-welded welding groove of the thin-wall tube is 55~65 °, the thin-wall tube docking
The argon arc welding technique parameter setting of welding are as follows: 70~80A of electric current, 8~9V of voltage, 10~15L/min of gas flow, back protection
The flow of gas is 15~20L/min.
Preferably, the stainless steel minor diameter thin wall pipe is S316L thin-wall tube.
In the present embodiment, the temperature sensor uses infrared thermometer.
Embodiment 2:
As shown in Fig. 1 to 5, tested using the stainless steel heating coil of 18600 chemical ships, developmental tube φ
68x3x250mmx2 root is welded by pipe WPS, is then carried out simulation straightened up in place test, is passed through non-destructive inspection test, power
Test and corrosion test are learned, checks whether to meet service performance.
Concrete scheme:
A) welding preparation: according to heating coil drawing and welding procedure, prepare test S316L tubing.
B) Butt Assembling: guarantee pipe docking point-blank.
C) butt welding: being welded using short arc, the not low preheating temperature of interlayer temperature and no more than 100 DEG C (welding per pass
Weld seam should all carry out a layer temperature measurement).Back of weld also carries out thermometric, and together, the back side carries out a thermometric, final temperature for every welding
120 degrees Celsius of control or less.Welding sequence, from one end progress of weld other end.It is checked after being soldered per pass weld seam, discovery welding defect is answered
It removes in time.Take multi-layer multi-pass welding, every thickness degree 3-4mm, weld width 6-8mm.
E) argon arc welding corrects: first carrying out sufficient quantity argon gas to pipe, then carries out argon arc welding heating to pipe, then part
During which water-spraying control carries out thermometric, the angular deformation correction of pipe is completed after natural cooling.
G) it is corrected by above-mentioned argon arc welding, nondestructive inspection, mechanical test and corrosion test are qualified.
It is above-mentioned by the way of argon arc welding heating+water-cooling pattern correction, under reasonable welding condition, can obtain
The welding point of high quality, the performance indexes of welding procedure qualification test meet technical requirements, and construction workshop is strictly pressed
It is constructed (including weld and correct) according to welding procedure, final 18600 chemical ship reality ship welding connect stainless steel heating coil
Head carries out RT+PT inspection, and weld seam is all qualified
The present embodiment keeps stainless steel small diameter tube thin using stainless steel small diameter tube thin-wall tube TIG weldering heating water cooling correction process
The postwelding of wall pipe is correcting deformed, and stainless steel processing method cannot be corrected by changing heat source, while be changed by simple mechanical correction
TIG weldering heating water cooling correction, real ship application obtain good effect.
Above-mentioned stainless steel pipe correction new process can also develop skill for the welding deformation correction of other stainless-steel thin-wall pipes
Guidance, and more reasonable welding procedure and live applicability are formulated to product and offered reference.Which solve site welding key positions
The difficult point of welding deformation correction is set, can gain time and save rework cost for production.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvements and modifications can also be made, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of correction process of stainless steel minor diameter thin wall pipe butt welding bending deformation, which is characterized in that including following work
Skill step:
Step 10, the determination for being bent inner fovea part: it finds out the bending inner fovea part on thin-wall tube at butt girth welding seam, determine bending deformation
Amount；
Step 20 fills back protection gas: being filled with enough argon gas in the inside of thin-wall tube to form the back-protective of weld seam；
Step 30, argon arc welding do not fill silk heating: using argon arc welding, being generated in the case where being not filled with argon arc welding wire using argon arc welding
Electric arc heated along one week of butt girth welding seam；
Step 40, water-spraying control: local water-spraying control is carried out to the butt girth welding seam position on bending inner fovea part peripheral region；
Step 50, natural cooling: thin-wall tube integrally naturally cools to room temperature.
2. a kind of correction process of stainless steel minor diameter thin wall pipe butt welding bending deformation according to claim 1,
It is characterized in that, the argon arc welding of the step 30 does not fill silk in heating process, using temperature sensor detection thin-wall tube in butt joint ring
Temperature after the heating of commissure in the water-spraying control process of the step 40, detects butt girth welding seam using temperature sensor
Temperature at cooling after cooling, while the thin-wall tube according to obtained in the determination process of the bending inner fovea part of step 10 is curved
Bent deflection controls the temperature difference of temperature and the temperature after cooling after butt girth welding seam heating, to realize
The curvature correction of thin-wall tube.
3. a kind of correction process of stainless steel minor diameter thin wall pipe butt welding bending deformation according to claim 1,
It is characterized in that, further includes the step 5 before step 10 is set: several groups being pre-established by simulation test and are related to thin-wall tube rule
When lattice, the correction temperature difference formed by argon arc welding heating and water-spraying control, the correcting deformed amount formed through natural cooling, heating
Between, the mutual relation curve or table of cooling time, the data in the relation curve or table are for instructing thin-wall tube
Curvature correction.
4. a kind of correction process of stainless steel minor diameter thin wall pipe butt welding bending deformation according to claim 3,
It is characterized in that, the simulation test further includes butt girth welding seam non-destructive inspection test after calibration, mechanical property test and resistance to
Corrosion test.
5. a kind of correction process of stainless steel minor diameter thin wall pipe butt welding bending deformation according to claim 1,
It is characterized in that, the argon arc welding of the step 30 does not fill silk in heating process, the processing parameter setting of argon arc welding are as follows: electric current 75~
85A, 9~10V of voltage, 10~15L/min of gas flow.
6. a kind of correction process of stainless steel minor diameter thin wall pipe butt welding bending deformation according to claim 1,
It is characterized in that, the step 20 is filled in back protection gas process, and it is 15~20L/min that the flow of gas is protected at back.
7. a kind of correction process of stainless steel minor diameter thin wall pipe butt welding bending deformation according to claim 1,
It is characterized in that, the double V-groove that the butt-welded welding groove of thin-wall tube is 55~65 °, the thin-wall tube is butt-welded
Argon arc welding technique parameter setting are as follows: the stream of gas is protected at 70~80A of electric current, 8~9V of voltage, 10~15L/min of gas flow, back
Amount is 15~20L/min.
8. a kind of correction process of stainless steel minor diameter thin wall pipe butt welding bending deformation according to claim 1,
It is characterized in that, the stainless steel minor diameter thin wall pipe is S316L thin-wall tube.
9. a kind of correction process of stainless steel minor diameter thin wall pipe butt welding bending deformation according to claim 2,
It is characterized in that, the temperature sensor uses infrared thermometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811080376.2A CN109277672B (en) | 2018-09-17 | 2018-09-17 | Correcting process for butt welding bending deformation of stainless steel small-diameter thin-walled tube |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811080376.2A CN109277672B (en) | 2018-09-17 | 2018-09-17 | Correcting process for butt welding bending deformation of stainless steel small-diameter thin-walled tube |
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| CN109277672A true CN109277672A (en) | 2019-01-29 |
| CN109277672B CN109277672B (en) | 2020-09-18 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111360376A (en) * | 2020-03-12 | 2020-07-03 | 江苏宜安建设有限公司 | Inert gas shielded dynamic welding without adding filler metal to pipeline |
| CN111687517A (en) * | 2020-04-29 | 2020-09-22 | 海洋石油工程（青岛）有限公司 | Process method for correcting linearity of stainless steel pipeline by welding |
| CN113909825A (en) * | 2021-11-09 | 2022-01-11 | 湖北三江航天红阳机电有限公司 | Processing method of large-size thin-wall load cabin |
| CN115121916A (en) * | 2022-08-09 | 2022-09-30 | 内蒙古第一机械集团股份有限公司 | Electric arc welding correction method for post-welding deformation of steel plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111360376A (en) * | 2020-03-12 | 2020-07-03 | 江苏宜安建设有限公司 | Inert gas shielded dynamic welding without adding filler metal to pipeline |
| CN111687517A (en) * | 2020-04-29 | 2020-09-22 | 海洋石油工程（青岛）有限公司 | Process method for correcting linearity of stainless steel pipeline by welding |
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| Publication number | Publication date |
|---|---|
| CN109277672B (en) | 2020-09-18 |
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