CN110253117A - A kind of argon-are welding technology of 2507 steel pipe of super austenitic stainless steel - Google Patents
A kind of argon-are welding technology of 2507 steel pipe of super austenitic stainless steel Download PDFInfo
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- CN110253117A CN110253117A CN201910535603.4A CN201910535603A CN110253117A CN 110253117 A CN110253117 A CN 110253117A CN 201910535603 A CN201910535603 A CN 201910535603A CN 110253117 A CN110253117 A CN 110253117A
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other 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
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/028—Seam welding; Backing means; Inserts for curved planar 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
- B23K9/16—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
- B23K9/00—Arc welding or cutting
- B23K9/24—Features related to electrodes
- B23K9/28—Supporting devices for electrodes
- B23K9/287—Supporting devices for electrode holders
-
- 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
- B23K9/325—Devices for supplying or evacuating shielding gas
-
- 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
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
- B23K2103/05—Stainless steel
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a kind of argon-are welding technologies of 2507 steel pipe of super austenitic stainless steel; the processing step carried on the back protecting tool set-up including steel pipe cutting stock, welding wire selection, welding equipment selection and setting, groove preparation, steel pipe pretreatment, steel pipe splicing and positioning, installation, fill back protective gas, welding; carry on the back the hydrogen for the nitrogen+10% that protective gas is 90%; the nitrogen for the argon gas+2% that front protecting gas is 98% is welded, welding sequence includes TIG bottoming, filling and capping；The welding current 62-65A of TIG bottoming, voltage 11-12V, speed of welding 5.06-5.48cm/min, heat input 0.74-0.93KJ/mm；The welding current of TIG filling is 62-65A, voltage 11-12V, speed of welding 3.88-4.20cm/min, heat input 0.97-1.21KJ/mm；The welding current of TIG capping is 67-71A, voltage 11-12V, speed of welding 4.23-4.58cm/min, heat input 0.96-1.20KJ/mm；Interlayer temperature is less than 100 degrees Celsius.The present invention improves the quality of the welding of 2507 steel pipes.
Description
Technical field
The present invention relates to welding technology fields, and in particular to a kind of argon arc welding weldering of 2507 steel pipe of super austenitic stainless steel
Connect technique.
Background technique
2507 (UNS S32750) are a kind of super austenitic stainless steels, and the selection of welding parameter is for welding point
Performance influence is particularly important, it directly influences ferritic volume fraction in weld metal.
Butt welding for 2507 steel pipe of stainless steel may generate excessive iron element if thermal weld stress is too small
Body tissue；If heat input is excessive, although enough austenites can be obtained, the iron element of heat affected area will also result in simultaneously
Body crystal grain is grown up, and feature the most outstanding is the tremendous influence of thermal cycle Welded Joints heterogeneous microstructure occurred.?
In welding process, there are important phase transition for Seam and heat effected zone, will greatly influence the ductility and corrosion resistance of metal,
To make welding joint mechanical property decline.
Therefore, suitable welding procedure and reasonable technological parameter are only selected, the performance requirement of welding point is just able to satisfy,
In order to improve the welding quality of 2507 steel pipe butt-welded side seam of stainless steel, it is necessary to by research and test repeatedly, develop one
The welding procedure of kind mature and reliable, to meet the needs of high performance 2507 steel-pipe welding of super austenitic stainless steel.
Summary of the invention
To solve the above-mentioned problems, the present invention proposes a kind of argon arc welding welding work of 2507 steel pipe of super austenitic stainless steel
Skill improves the quality that 2507 butt welding of steel tube of super austenitic stainless steel connects.Specific technical solution is as follows:
A kind of argon-are welding technology of 2507 steel pipe of super austenitic stainless steel, comprises the technical steps that:
(1) steel pipe cutting stock: 2507 stainless-steel pipes are used, are cut and formed respectively by design requirement；
(2) welding wire selects: using AWSA5.9:ER2594, diameter for the welding wire of φ 2.4mm；
(3) welding equipment selection and setting: direct current is being set as just using tig arc welding machine and matched TIG welding gun, electric power polarity
It connects, the TIG welding gun tungsten electrode type is cerium tungsten electrode WCe-20, diameter is φ 2.4mm；It is 16mm that TIG torch nozzle, which selects internal diameter,
Nozzle；
(4) groove prepares: welding groove is accomplished fluently at the docking of stainless-steel pipe, the welding groove is using docking V-type
The bevel angle of groove, the docking double V-groove is 70 ° ± 5 °；The height of the bottom root face of the docking double V-groove is 0-
1mm；
(5) steel pipe pre-processes: carrying out surface preparation, the surface to the welding groove region of stainless-steel pipe before welding
Pretreatment includes being processed by shot blasting using stainless steel polishing piece to welding groove region；
(6) stainless-steel pipe steel pipe splicing and positioning: is butted into double V-groove, the butt-joint clearance of the docking double V-groove
It is 1-3 millimeters；Spot welding positioning is carried out to stainless-steel pipe after docking, the position of the spot welding positioning is located at table in stainless-steel pipe
At the butt-welded side seam in face；
(7) installation back protecting tool set-up: after steel pipe splicing and positioning, the protection of back of weld is carried out using back protecting tool set-up,
The back protecting tool set-up includes being mounted on the back cover sheet to the stainless-steel pipe both ends connected；
(8) it fills back protective gas: being filled with back protection gas into stainless-steel pipe by carrying on the back cover sheet before weldering, the back is protected
Protect the hydrogen for+10% percent by volume of nitrogen that gas is 90% percent by volume；
(9) weld: welding position is vertical fixation, 3-10 millimeters of thickness coverage area, and welding sequence is first to carry out TIG to beat
Bottom, then carry out TIG filling and capping；
Wherein, the welding condition of the TIG bottoming are as follows: protective gas is+2% body of argon gas of 98% percent by volume
The nitrogen of product percentage, shield gas flow rate 8-15L/min；Welding current 62-65A, voltage 11-12V, speed of welding
5.06-5.48cm/min, heat input 0.74-0.93KJ/mm；
Wherein, the welding condition of the TIG filling and capping are as follows: protective gas is the argon gas of 98% percent by volume
The carbon dioxide of+2%% percent by volume；Shield gas flow rate is 8-15L/min, welding current 62- when TIG filling weldering
65A, voltage 11-12V, speed of welding 3.88-4.20cm/min, heat input 0.97-1.21KJ/mm；It is protected when TIG cosmetic welding
Gas flow is 8-15L/min；Welding current is 67-71A, voltage 11-12V, speed of welding 4.23-4.58cm/min, and heat is defeated
Enter amount 0.96-1.20KJ/mm；Interlayer temperature is less than 100 degrees Celsius.
Preferably, in the steel pipe pretreatment process, the integrated protection that stainless-steel pipe is carried out before surface preparation is arranged
It applies, the integrated protection measure includes following content:
(1) when using truck transport stainless-steel pipe, stainless-steel pipe should be avoided and directly contacted with the steel surface of truck；
(2) the protection work of every stainless-steel pipe need to be carried out, no when stacking stainless-steel pipe on wooden Special shelf
It can arbitrarily be deposited on place, stainless-steel pipe storage area should mutually be separated with carbon steel pipes storage region；
(3) special hanger should be used to lift stainless-steel pipe, the special hanger includes Special hoop, perpendicular tongs and lift
Tongs, suspender belt need to keep cleannes, forbid with wirerope handling stainless-steel pipe；
(4) clean gloves contact stainless-steel pipe need to be worn；
(5) shoe cover need to be dressed and carry out operation, forbid directly stepping down on stainless-steel pipe.
As a further improvement, the argon-are welding technology of 2507 steel pipe of a kind of super austenitic stainless steel of the invention
It further include being carried on the back in protecting tool set-up process in the installation, it is using temporary sealing tooling that the progress of butt-welded side seam front is interim close
Envelope, and the temporary sealing tooling is removed in the TIG backing welding.
Preferably, the temporary sealing tooling includes surrounding to be pasted onto the positive U.S. line paper pressure-sensitive adhesive of the butt-welded side seam
Band.
As further improvement of the invention, double-sided adhesive is also connected on the outer surface of the U.S. line letterweight sensitive adhesive tape
Band, the temporary sealing tooling further include that adhesive tape tears off device automatically, and it is described including being fixed on that the adhesive tape tears off device automatically
The stepper motor on cover sheet is carried on the back, the motor shaft of the stepper motor and the axis coaxle of 2507 steel pipe of stainless steel are set
It sets, a cursor is fixed on the motor shaft of the stepper motor, the cursor is fixedly arranged at the front end with an elastic suspended arm axle, institute
The winding idler wheel that rotation on elastic suspended arm axle is provided with the double faced adhesive tape surface at the butt-welded side seam that one is pressed against the steel pipe is stated,
When carrying out TIG backing welding, the winding idler wheel is made to transport around the revolution of steel pipe axis under the drive of the stepper motor respectively
Spinning motions dynamic and along the double faced adhesive tape surface scrolls, and the positive U.S. line letterweight sensitive adhesive tape of butt-welded side seam will be pasted onto
It is gradually shed in a manner of winding, and the movement velocity of the revolution motion of the winding idler wheel is synchronous with the speed of welding of setting.
In the present invention, the stepper motor connects controller.By controller, the revolving speed of stepper motor can be set, is made
The movement velocity that the revolution motion of idler wheel must be wound is synchronous with the speed of welding of setting.
When operation, it will first be looped around the double faced adhesive tape of the positive U.S. line letterweight sensitive adhesive tape outer surface of steel pipe butt-welded side seam
One end is contacted with winding idler wheel, can be manually rotated cursor and winding idler wheel is made to roll a Duan Meiwen letterweight sensitive adhesive tape, so
Stepper motor rotation is opened afterwards, carries out bottom argon arc welding.It is automatic by step motor control winding idler wheel when bottom argon arc welding welds
Winding, in the welding process tears the side weld ddge of U.S. line letterweight sensitive adhesive tape to realize, and operator can also join
The revolution motion speed of winding idler wheel is examined more to accurately control the speed of welding of bottoming.In addition, in subsequent filling and lid
In the welding process of face, the revolution that stepper motor drives winding idler wheel can be equally opened, using the weldering as control filling and capping
Connect the reference of speed.
Preferably, described to fill in back protective gas process, 10 times of sealing space volumes are filled with into sealing space
The back protective gas.
Preferably, after the completion of per pass welding sequence, the oxidation tint between welding bead is cleared up using stainless steel special-purpose steel wire brush.
On the basis of surface oxidation color is cleared up between above-mentioned welding bead, in order to enable the cleaning of welding bead surface oxidation color is more thorough
Bottom reuses the oxidation tint that laser cleaning machine is further cleared up between welding bead.
Preferably, the tig arc welding machine in the present invention uses Panasonic YC-400TX type tig arc welding machine.
Preferably, the TIG welding wire is using the Hyundai SMT2594 φ for meeting AWSA5.9:ER2594 welding wire standard
2.4 welding wire.
The beneficial effects of the present invention are:
First, a kind of argon-are welding technology of 2507 steel pipe of super austenitic stainless steel of the invention selects Ni content
It is higher than the ER2594 wlding of base material, is conducive to facilitate transformation of the ferrite to austenite in the welding process, and weldering can be stablized
Austenite in seam, to obtain the performance of excellent stress corrosion resistant rupture and the performance of resistance to spot corrosion and intergranular corrosion resistance.
Second, the argon-are welding technology of 2507 steel pipe of a kind of super austenitic stainless steel of the invention, using TIG bottoming
The combined welding method of weldering and TIG filling and cosmetic welding, back protective gas use the hydrogen of 90% nitrogen+10%, and front is protected
The nitrogen that gas uses 98% argon gas+2% is protected, and it is defeated to optimize the electric current in each welding sequence, voltage, speed of welding, heat
Enter the technological parameters such as amount, so as to ensure that weld metal meets the requirement of ferrite content examination criteria and spot corrosion performance,
Performance and quality after which thereby enhancing 2507 steel-pipe welding of super austenitic stainless steel.
Third, a kind of argon-are welding technology of 2507 steel pipe of super austenitic stainless steel of the invention are carried on the back by installation
Protecting tool set-up and the U.S. line letterweight sensitive adhesive tape of stickup when the butt-welded side seam of steel pipe is faced with, realize the sealing of back protection, from
And the loss for the back protective gas being filled with before welding is advantageously reduced, while being filled with 10 times of sealing space of back before cooperating welding
Protective gas, it is advantageously ensured that steel duct has sufficient back protective gas when welding starts and in welding process, to improve
The reliability of back protection.
4th, a kind of argon-are welding technology of 2507 steel pipe of super austenitic stainless steel of the invention is provided with gluing
Band tears off device automatically, without all tearing off U.S. line letterweight sensitive adhesive tape when welding, but touch double-sided adhesive using winding idler wheel
Band rolls winding, so that the side weld ddge realized in the welding process is torn, thus on the one hand drastically reduces back protective gas
Loss, saved cost, on the other hand also facilitate operation.In addition, the movement of the revolution motion by setting winding idler wheel
Speed is synchronous with the speed of welding of setting, enables to the operator of manual argon arc welding to wind the revolution motion speed of idler wheel
Manual argon is thus further improved for reference so as to preferably more be accurately controlled the speed of welding of manual argon arc welding
The reliability and stability of arc welding.
5th, a kind of argon-are welding technology of 2507 steel pipe of super austenitic stainless steel of the invention, welding bead Surface Oxygen
Change the cleaning twice that color passes through wire brush and laser cleaning machine, advantageously ensures that austenite and ferrite in weld seam have a conjunction
Suitable component ratio, to further increase the performance of welding point.
6th, a kind of argon-are welding technology of 2507 steel pipe of super austenitic stainless steel of the invention is located in advance on surface
The integrated protection measure that stainless-steel pipe is carried out before reason is more comprehensive, is beneficial to prevent harmful element and infiltrates into stainless-steel pipe table
Face, to improve the Corrosion Protection of weld seam.
Detailed description of the invention
Fig. 1 is that a kind of process flow of the argon-are welding technology of 2507 steel pipe of super austenitic stainless steel of the invention is shown
It is intended to；
Fig. 2 is that groove prepares and weld the structural schematic diagram of build up sequence；
Fig. 3 is the structural schematic diagram that setting back protecting tool set-up and adhesive tape tear off device automatically on steel pipe.
In figure: 1, U.S. line letterweight sensitive adhesive tape, 2, double faced adhesive tape, 3, adhesive tape tear off device automatically, 4, back cover sheet, 5,
Stepper motor, 6, steel pipe, 7, cursor, 8, elastic suspended arm axle, 9, butt-welded side seam, 10, winding idler wheel, 11, bolt, 12, axis use
Retaining ring, 13, key, 14, air inflation nozzle.
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:
It is as shown in Figures 1 to 3 a kind of argon-are welding technology of 2507 steel pipe of super austenitic stainless steel of the invention
Embodiment comprises the technical steps that:
(1) steel pipe cutting stock: 2507 stainless-steel pipes are used, are cut and formed respectively by design requirement；
(2) welding wire selects: using AWSA5.9:ER2594, diameter for the welding wire of φ 2.4mm；
(3) welding equipment selection and setting: direct current is being set as just using tig arc welding machine and matched TIG welding gun, electric power polarity
It connects, the TIG welding gun tungsten electrode type is cerium tungsten electrode WCe-20, diameter is φ 2.4mm；It is 16mm that TIG torch nozzle, which selects internal diameter,
Nozzle；
(4) groove prepares: welding groove is accomplished fluently at the docking of stainless-steel pipe, the welding groove is using docking V-type
The bevel angle of groove, the docking double V-groove is 70 ° ± 5 °；The height of the bottom root face of the docking double V-groove is 0-
1mm；
(5) steel pipe pre-processes: carrying out surface preparation, the surface to the welding groove region of stainless-steel pipe before welding
Pretreatment includes being processed by shot blasting using stainless steel polishing piece to welding groove region；
(6) stainless-steel pipe steel pipe splicing and positioning: is butted into double V-groove, the butt-joint clearance of the docking double V-groove
It is 1-3 millimeters；Spot welding positioning is carried out to stainless-steel pipe after docking, the position of the spot welding positioning is located at table in stainless-steel pipe
At the butt-welded side seam in face；
(7) installation back protecting tool set-up: after steel pipe splicing and positioning, the protection of back of weld is carried out using back protecting tool set-up,
The back protecting tool set-up includes being mounted on the back cover sheet to the stainless-steel pipe both ends connected；
(8) it fills back protective gas: being filled with back protection gas into stainless-steel pipe by carrying on the back cover sheet before weldering, the back is protected
Protect the hydrogen for+10% percent by volume of nitrogen that gas is 90% percent by volume；
(9) weld: welding position is vertical fixation, 3-10 millimeters of thickness coverage area, and welding sequence is first to carry out TIG to beat
Bottom, then carry out TIG filling and capping；
Wherein, the welding condition of the TIG bottoming are as follows: protective gas is+2% body of argon gas of 98% percent by volume
The nitrogen of product percentage, shield gas flow rate 8-15L/min；Welding current 62-65A, voltage 11-12V, speed of welding
5.06-5.48cm/min, heat input 0.74-0.93KJ/mm；
Wherein, the welding condition of the TIG filling and capping are as follows: protective gas is the argon gas of 98% percent by volume
The carbon dioxide of+2%% percent by volume；Shield gas flow rate is 8-15L/min, welding current 62- when TIG filling weldering
65A, voltage 11-12V, speed of welding 3.88-4.20cm/min, heat input 0.97-1.21KJ/mm；It is protected when TIG cosmetic welding
Gas flow is 8-15L/min；Welding current is 67-71A, voltage 11-12V, speed of welding 4.23-4.58cm/min, and heat is defeated
Enter amount 0.96-1.20KJ/mm；Interlayer temperature is less than 100 degrees Celsius.
Preferably, in the steel pipe pretreatment process, the integrated protection that stainless-steel pipe is carried out before surface preparation is arranged
It applies, the integrated protection measure includes following content:
(1) when using truck transport stainless-steel pipe, stainless-steel pipe should be avoided and directly contacted with the steel surface of truck；
(2) the protection work of every stainless-steel pipe need to be carried out, no when stacking stainless-steel pipe on wooden Special shelf
It can arbitrarily be deposited on place, stainless-steel pipe storage area should mutually be separated with carbon steel pipes storage region；
(3) special hanger should be used to lift stainless-steel pipe, the special hanger includes Special hoop, perpendicular tongs and lift
Tongs, suspender belt need to keep cleannes, forbid with wirerope handling stainless-steel pipe；
(4) clean gloves contact stainless-steel pipe need to be worn；
(5) shoe cover need to be dressed and carry out operation, forbid directly stepping down on stainless-steel pipe.
As a further improvement, the argon arc welding welding work of 2507 steel pipe of a kind of super austenitic stainless steel of the present embodiment
Skill further includes carrying on the back in protecting tool set-up process in the installation, using temporary sealing tooling that the progress of butt-welded side seam front is interim close
Envelope, and the temporary sealing tooling is removed in the TIG backing welding.
Preferably, the temporary sealing tooling includes surrounding to be pasted onto the positive U.S. line paper pressure-sensitive adhesive of the butt-welded side seam
Band.
It further improves, is also connected on the outer surface of the U.S. line letterweight sensitive adhesive tape 1 two-sided as the present embodiment
Adhesive tape 2, the temporary sealing tooling further include that adhesive tape tears off device 3 automatically, and it includes being fixed on that the adhesive tape tears off device 3 automatically
Stepper motor 5 on the back cover sheet 4, the axis of the motor shaft of the stepper motor 5 and 2507 steel pipe 6 of stainless steel
It is coaxially disposed, a cursor 7 is fixed on the motor shaft of the stepper motor 5, the cursor 7 is fixedly arranged at the front end with an elasticity
Cantilevered axle 8, rotation is provided with the double faced adhesive tape 2 at the butt-welded side seam 9 that one is pressed against the steel pipe 6 on the elastic suspended arm axle 8
The winding idler wheel 10 on surface, when carrying out TIG backing welding, the winding idler wheel 10 is made respectively under the drive of the stepper motor 5
Revolution motion around 6 axis of steel pipe and the spinning motion along 2 surface scrolls of double faced adhesive tape, and butt-welded side seam will be pasted onto
9 positive U.S. line letterweight sensitive adhesive tapes 1 are gradually shed in a manner of winding, and the movement speed of the revolution motion of the winding idler wheel 10
It spends synchronous with the speed of welding of setting.
In the present embodiment, the stepper motor 5 connects controller.By controller, turning for stepper motor 5 can be set
Speed, so that the movement velocity of the revolution motion of winding idler wheel 10 is synchronous with the speed of welding of setting.
When operation, it will first be looped around the double-sided adhesive of positive U.S. 1 outer surface of line letterweight sensitive adhesive tape of 6 butt-welded side seam of steel pipe 9
An end with 2 is contacted with winding idler wheel 10, be can be manually rotated cursor 7 and to wind idler wheel 10 that roll a Duan Meiwen letterweight quick
Adhesive tape 1 is then turned on the rotation of stepper motor 5, carries out bottom argon arc welding.Bottom argon arc welding is controlled when welding by stepper motor 5
10 automatic winding of idler wheel is wound, the side weld ddge of U.S. line letterweight sensitive adhesive tape is torn in the welding process to realize, and is grasped
The speed of welding of bottoming can also more be accurately controlled with reference to the revolution motion speed for winding idler wheel 10 by making personnel.In addition,
In subsequent filling and during cover welding, can equally open the revolution that stepper motor 5 drives winding idler wheel 10, using as
The reference of the speed of welding of control filling and capping.
Preferably, described to fill in back protective gas process, 10 times of sealing space volumes are filled with into sealing space
The back protective gas.
Preferably, after the completion of per pass welding sequence, the oxidation tint between welding bead is cleared up using stainless steel special-purpose steel wire brush.
On the basis of surface oxidation color is cleared up between above-mentioned welding bead, in order to enable the cleaning of welding bead surface oxidation color is more thorough
Bottom reuses the oxidation tint that laser cleaning machine is further cleared up between welding bead.
Preferably, the tig arc welding machine in the present embodiment uses Panasonic YC-400TX type tig arc welding machine.
Preferably, the TIG welding wire is using the Hyundai SMT2594 φ for meeting AWSA5.9:ER2594 welding wire standard
2.4 welding wire.
Embodiment 2:
Using the welding procedure of embodiment 1, the butt welding test of 2504 steel pipe of super austenitic stainless steel is carried out, will be welded
It connects sample to process according to the specimen size requirement of corresponding examination criteria, is to refer to American Bureau of Shipping's (ABS) material and welding conditions
File is led, following items detection is carried out, see the table below:
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 (8)
1. a kind of argon-are welding technology of 2507 steel pipe of super austenitic stainless steel, which is characterized in that walked including following technique
It is rapid:
(1) steel pipe cutting stock: 2507 stainless-steel pipes are used, are cut and formed respectively by design requirement；
(2) welding wire selects: using AWSA5.9:ER2594, diameter for the welding wire of φ 2.4mm；
(3) welding equipment selection and setting: being set as straight polarity direct current using tig arc welding machine and matched TIG welding gun, electric power polarity,
The TIG welding gun tungsten electrode type is cerium tungsten electrode WCe-20, diameter is φ 2.4mm；It is the spray of 16mm that TIG torch nozzle, which selects internal diameter,
Mouth；
(4) groove prepares: welding groove is accomplished fluently at the docking of stainless-steel pipe, the welding groove uses docking double V-groove,
The bevel angle of the docking double V-groove is 70 ° ± 5 °；The height of the bottom root face of the docking double V-groove is 0-1mm；
(5) steel pipe pre-processes: carrying out surface preparation to the welding groove region of stainless-steel pipe before welding, the surface is located in advance
Reason includes being processed by shot blasting using stainless steel polishing piece to welding groove region；
(6) steel pipe splicing and positioning: stainless-steel pipe is butted into double V-groove, the butt-joint clearance of the docking double V-groove is 1-
3 millimeters；Spot welding positioning is carried out to stainless-steel pipe after docking, the position of the spot welding positioning is located at stainless-steel pipe inner surface
At butt-welded side seam；
(7) installation back protecting tool set-up: after steel pipe splicing and positioning, the protection of back of weld is carried out using back protecting tool set-up, described
Carrying on the back protecting tool set-up includes being mounted on the back cover sheet to the stainless-steel pipe both ends connected；
(8) it fills back protective gas: being filled with back protection gas into stainless-steel pipe by carrying on the back cover sheet before weldering, the back protects gas
Body is the hydrogen of+10% percent by volume of nitrogen of 90% percent by volume；
(9) weld: welding position is vertical fixation, 3-10 millimeters of thickness coverage area, and welding sequence is first to carry out TIG bottoming,
TIG filling and capping are carried out again；
Wherein, the welding condition of the TIG bottoming are as follows: protective gas is+2% volume hundred of argon gas of 98% percent by volume
Divide the nitrogen of ratio, shield gas flow rate 8-15L/min；Welding current 62-65A, voltage 11-12V, speed of welding 5.06-
5.48cm/min, heat input 0.74-0.93KJ/mm；
Wherein, the welding condition of TIG filling and capping are as follows: protective gas be 98% percent by volume argon gas+
The carbon dioxide of 2%% percent by volume；Shield gas flow rate is 8-15L/min, welding current 62- when TIG filling weldering
65A, voltage 11-12V, speed of welding 3.88-4.20cm/min, heat input 0.97-1.21KJ/mm；It is protected when TIG cosmetic welding
Gas flow is 8-15L/min；Welding current is 67-71A, voltage 11-12V, speed of welding 4.23-4.58cm/min, and heat is defeated
Enter amount 0.96-1.20KJ/mm；Interlayer temperature is less than 100 degrees Celsius.
2. a kind of argon-are welding technology of 2507 steel pipe of super austenitic stainless steel according to claim 1, feature
It is, in the steel pipe pretreatment process, the integrated protection measure of stainless-steel pipe, the synthesis is carried out before surface preparation
Safeguard measure includes following content:
(1) when using truck transport stainless-steel pipe, stainless-steel pipe should be avoided and directly contacted with the steel surface of truck；
(2) the protection work of every stainless-steel pipe need to be carried out when stacking stainless-steel pipe on wooden Special shelf, it can not be with
Meaning is deposited on place, and stainless-steel pipe storage area should mutually be separated with carbon steel pipes storage region；
(3) special hanger should be used to lift stainless-steel pipe, the special hanger includes Special hoop, perpendicular tongs and lifts
Pincers, suspender belt need to keep cleannes, forbid with wirerope handling stainless-steel pipe；
(4) clean gloves contact stainless-steel pipe need to be worn；
(5) shoe cover need to be dressed and carry out operation, forbid directly stepping down on stainless-steel pipe.
3. a kind of argon-are welding technology of 2507 steel pipe of super austenitic stainless steel according to claim 1, feature
It is, further includes being faced butt-welded side seam front using temporary sealing tooling in the installation back protecting tool set-up process
When seal, and the temporary sealing tooling is removed in the TIG backing welding.
4. a kind of argon-are welding technology of 2507 steel pipe of super austenitic stainless steel according to claim 3, feature
It is, the temporary sealing tooling includes surrounding to be pasted onto the positive U.S. line letterweight sensitive adhesive tape of the butt-welded side seam.
5. a kind of argon-are welding technology of 2507 steel pipe of super austenitic stainless steel according to claim 4, feature
It is, is also connected with double faced adhesive tape on the outer surface of the U.S. line letterweight sensitive adhesive tape, the temporary sealing tooling further includes glue
Adhesive tape tears off device automatically, and it includes the stepper motor being fixed on the back cover sheet that the adhesive tape tears off device automatically, described
The axis coaxle of the motor shaft of stepper motor and 2507 steel pipe of stainless steel is arranged, fixed on the motor shaft of the stepper motor
There is a cursor, the cursor is fixedly arranged at the front end with an elastic suspended arm axle, and rotation is provided with a pressure on the elastic suspended arm axle
The winding idler wheel for leaning against the double faced adhesive tape surface at the butt-welded side seam of the steel pipe, the winding rolling when carrying out TIG backing welding
It takes turns and makees respectively under the drive of the stepper motor around the revolution motion of steel pipe axis and along the double faced adhesive tape surface scrolls
Spinning motion, and the positive U.S. line letterweight sensitive adhesive tape of butt-welded side seam will be pasted onto and gradually shed in a manner of winding, and is described
The movement velocity for winding the revolution motion of idler wheel is synchronous with the speed of welding of setting.
6. a kind of argon-are welding technology of 2507 steel pipe of super austenitic stainless steel according to claim 1, feature
It is, it is described to fill in back protective gas process, the back protection of 10 times of sealing space volumes is filled with into sealing space
Gas.
7. a kind of argon-are welding technology of 2507 steel pipe of super austenitic stainless steel according to claim 1, feature
It is, after the completion of per pass welding sequence, clears up the oxidation tint between welding bead using stainless steel special-purpose steel wire brush.
8. a kind of argon-are welding technology of 2507 steel pipe of super austenitic stainless steel according to claim 1, feature
It is, reuses the oxidation tint that laser cleaning machine is further cleared up between welding bead.
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| CN115091135A (en) * | 2022-07-05 | 2022-09-23 | 江苏华之益机械有限公司 | Process method for controlling ferrite content of overlaying layer of austenitic stainless steel |
| CN115302051A (en) * | 2022-10-12 | 2022-11-08 | 江苏利柏特股份有限公司 | Manual tungsten electrode argon arc welding process method for super dual-phase steel process pipeline |
| CN116571831A (en) * | 2023-07-11 | 2023-08-11 | 成都国营锦江机器厂 | Welding tool, system and welding method for engine fuel manifold |
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