CN108856966A - A kind of 1.5mm titanium alloy is not added an automatic TIG welding and connects method - Google Patents
A kind of 1.5mm titanium alloy is not added an automatic TIG welding and connects method Download PDFInfo
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- CN108856966A CN108856966A CN201810804448.7A CN201810804448A CN108856966A CN 108856966 A CN108856966 A CN 108856966A CN 201810804448 A CN201810804448 A CN 201810804448A CN 108856966 A CN108856966 A CN 108856966A
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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
- B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
- B23K9/0035—Arc welding or cutting specially adapted for particular articles or work of thin articles
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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
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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
- B23K9/235—Preliminary treatment
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Abstract
The invention belongs to welding technology fields, and in particular to a kind of 1.5mm titanium alloy (TA15) is not added an automatic TIG welding and connects method.Before formal welding, treats welded specimen and carry out manual argon arc welding tack welding, weld seam is formally welded after tack welding, postwelding quality examination.Mode is connect using automatic TIG welding and realizes that 1.5mm titanium alloy (TA15) is welded, and does not add welding wire in welding process, width and heat affected area range are relatively narrow after appearance of weld.The defects of appearance of weld is good after welding, face of weld flawless, stomata, recess, undercut, overlap, welding internal soundness, ambient temperature mechanical properties can reach standard QJ1666A-2011《The requirement of titanium or titanium alloy welding technology》I grade of requirement.
Description
Technical field
The invention belongs to welding technology fields, and in particular to a kind of 1.5mm titanium alloy (TA15) is not added an automatic TIG welding and connects
Method.
Background technique
Titanium or titanium alloy is widely used in aviation because of the performances such as higher specific strength, specific stiffness, corrosion-resistant, high temperature resistant
The fields such as space flight, ocean engineering and petrochemical industry.Titanium is a kind of active metal, very fast with oxygen, nitrogen, hydrogen reaction speed under high temperature,
Start to inhale at 250 DEG C hydrogen, 400 DEG C of beginning oxygen uptakes, 600 DEG C or more inhale nitrogen, need to be to molten bath and temperature therefore, in order to ensure that welding quality
Higher position carries out effective protection.The main component of TA15 titanium alloy is Ti-6.5Al-2Zr-1Mo-2V, is had higher
Room temperature, elevated temperature strength and good thermal stability.The present invention obtains 1.5mm titanium alloy (TA15) by test and silk is not added certainly
Dynamic TIG weld technological specification.
Summary of the invention
An automatic TIG welding is not added the object of the present invention is to provide a kind of 1.5mm titanium alloy (TA15) and connects method.Particular technique
Scheme is as follows：
A kind of 1.5mm titanium alloy (TA15) is not added an automatic TIG welding and connects method, includes the following steps：
Step 1：Weld surface treatment：Using machining process, test specimen welding surface to be welded is processed, test specimen pair
Junction is smooth, bright and clean, impulse- free robustness, and keeps corner angle, and surface roughness Ra maximum permissible value is 3.2 μm；
Step 2：Welding preparation：To-be-welded pieces are subjected to pickling, removal piece surface greasy dirt, nonmetallic inclusion etc., it is desirable that
The time interval of pickling and welding should not be too long, before welding using scraper blades scrape to-be-welded pieces position to be welded until exposing gold
Belong to gloss；
Step 3：Assembly：Test specimen to be welded is assembled, guarantees the welding surface alignment of test specimen to be welded, clamp and is fixed, two weld
Test specimen welding surface gap is connect no more than 0.15mm, misalignment is not more than 0.15mm, and cumulative length is not more than in any 100mm in part
20mm range internal clearance and misalignment are not more than 0.2mm；
Step 4：Automatic TIG welding connects；
Step 4.1：Tack welding：Before formal welding, treats welded specimen and carry out manual argon arc welding tack welding, position location
In test specimen head and the tail end positions to be welded, tack welding length about 5mm~10mm；Welding wire trade mark TA15, diameterIt welded
Front and back gas shield is carried out in journey.
Step 4.2：Formal weldering：Weld seam is formally welded after tack welding, formally the starting the arc, blow-out distance are when weldering
10mm~20mm formally uses front and back gas shield when welding.
Step 4.3：Postwelding unclamps fixture after sample is completely cooling and takes out test specimen.
Step 5：Postwelding quality examination.
Step 5.1：Postwelding is using visually or by means of 10 times or less magnifying glasses to automatic TIG welding seam progress presentation quality inspection
The defects of looking into, guaranteeing face of weld flawless, incomplete fusion, stomata, undercut, recess.
Step 5.2：Postwelding carries out non-destructive testing automatic TIG welding seam using X-ray, and weldquality meets QJ1666A-
I grades of level weld seam requirements in 2011.
Step 5.3：Room temperature tensile sample is taken to automatic TIG welding sewing, carries out connector room temperature stretching mechanical property testing, weldering
Stitch room temperature tensile strength is not less than basis material 95%.
Beneficial effects of the present invention：
1, mode is connect using automatic TIG welding and realizes that 1.5mm titanium alloy (TA15) is welded, do not add welding wire in welding process,
Width and heat affected area range are relatively narrow after appearance of weld.
2, appearance of weld is good after welding, the defects of face of weld flawless, stomata, recess, undercut, overlap, in welding
Portion's quality, ambient temperature mechanical properties can reach standard QJ1666A-2011《The requirement of titanium or titanium alloy welding technology》I grade of requirement.
Detailed description of the invention
The present invention includes 1 width attached drawing.
Fig. 1 is not added an automatic TIG welding for TA15 titanium alloy and connects test specimen weld seam schematic diagram.
Specific embodiment
It is 600mm × 100mm × 1.5mm that TA15 titanium alloy automatic TIG welding, which connects specimen size, and a kind of TA15 titanium of the present invention closes
Golden automatic TIG welding connects method and includes the following steps：
The first step：Weld surface treatment：Using machining process, sample welding face to be welded is processed, is protected
Demonstrate,proving its surface roughness Ra maximum permissible value is 3.2 μm, and interface is smooth, bright and clean, impulse- free robustness, and keeps corner angle；
Second step：Welding preparation：Test specimen to be welded is subjected to pickling, after air-drying, surface of test piece to be welded is pasted into brown paper
It is protected, it is desirable that the time interval of pickling and welding should not be too long, to be welded using scraper blades scrape to-be-welded pieces before welding
Position and test specimen upper and lower surface distance until expose metallic luster, and do not destroy docking wedge angle to face of weld 15mm range, finally
Using acetone or dehydrated alcohol wiped clean, piece surface greasy dirt, nonmetallic inclusion etc. are removed；
Third step：Assembly：Test specimen to be welded is assembled, guarantees the welding surface alignment of test specimen to be welded, clamp and is fixed, two weld
Test specimen welding surface gap is connect no more than 0.15mm, misalignment is not more than 0.15mm, and cumulative length is not more than in any 100mm in part
20mm range internal clearance and misalignment are not more than 0.2mm；
4th step：Automatic TIG welding connects
1) tack welding：Before formal welding, treats welded specimen and carry out manual argon arc welding tack welding, position location is to be welded
Test specimen head and the tail end positions, tack welding length 5mm~10mm；Welding wire trade mark TA15, diameterIt is carried out in welding process
Front and back gas shield；
Tack welding technological parameter：
Welding current：50A~70A
Speed of welding：V=100mm/min~140mm/min
Positive argon flow：10~15L/min
Back side argon flow：10~15L/min
2) formal weldering：Weld seam is formally welded after tack welding, starting the arc when formal welding, blow-out distance be 10mm~
20mm formally uses front and back gas shield when welding；Positive gas shield selects biggish nozzle, preferably to protect
Molten bath；The back side, which is used, protects sealing run and neighbouring high-temperature region with the weldering bakie blown.
Formal Welding parameter：
Tungsten electrode diameter：2.4mm
Arc voltage：8.5V~9.5V
Welding current：Peak value：50A~65A
Base value：45A~55A
Speed of welding：V=100mm/min~110mm/min
Positive argon flow：15~20L/min
Back side argon flow：8~15L/min
3) postwelding unclamps fixture taking-up test specimen after sample is completely cooling.
5th step：Postwelding quality examination
1) postwelding is protected using visually or by means of 10 times or less magnifying glasses to automatic TIG welding progress presentation quality inspection is stitched
The defects of demonstrate,proving face of weld flawless, incomplete fusion, stomata, undercut, recess；
2) postwelding carries out non-destructive testing automatic TIG welding seam using X-ray, and weldquality meets I in QJ1666A-2011
Grade level weld seam requirement；
3) room temperature tensile sample is taken to automatic TIG welding sewing, carries out connector room temperature stretching mechanical property testing, weld seam room temperature
Tensile strength is not less than the 95% of basis material.
Claims (4)
1. a kind of 1.5mm Titanium alloy TA15 is not added an automatic TIG welding and connects method, which is characterized in that include the following steps：
Step 1：Weld surface treatment：Using machining process, test specimen welding surface to be welded is processed, test specimen interface
Smooth, bright and clean, impulse- free robustness, and corner angle are kept, surface roughness Ra maximum permissible value is 3.2 μm；
Step 2：Welding preparation：By to-be-welded pieces carry out pickling, removal piece surface greasy dirt, nonmetallic inclusion, it is desirable that pickling and
The time interval of welding should not be too long, before welding using scraper blades scrape to-be-welded pieces position to be welded until exposing metal light
Pool；
Step 3：Assembly：Test specimen to be welded is assembled, guarantees the welding surface alignment of test specimen to be welded, clamp and is fixed, two welding examinations
Part welding surface gap is not more than 0.15mm, and misalignment is not more than 0.15mm, and cumulative length is not more than 20mm in any 100mm in part,
Internal clearance and misalignment are not more than 0.2mm；
Step 4：Automatic TIG welding connects；
Step 4.1：Tack welding：Before formal welding, treat welded specimen and carry out manual argon arc welding tack welding, position location to
Test specimen head and the tail end positions are welded, tack welding length is 5mm~10mm；Welding wire trade mark TA15, diameterIn welding process
Carry out front and back gas shield；
Step 4.2：Formal weldering：Weld seam is formally welded after tack welding, starting the arc when formal weldering, blow-out distance be 10mm~
20mm formally uses front and back gas shield when welding；
Step 4.3：Postwelding unclamps fixture after sample is completely cooling and takes out test specimen；
Step 5：Postwelding quality examination.
2. 1.5mm Titanium alloy TA15 according to claim 1 is not added an automatic TIG welding and connects method, which is characterized in that described
Step 4.1, the technological parameter of tack welding is：
Welding current：50A~70A, speed of welding：V=100mm/min~140mm/min
Positive argon flow：10~15L/min, back side argon flow：10~15L/min.
3. 1.5mm Titanium alloy TA15 according to claim 1 is not added an automatic TIG welding and connects method, which is characterized in that described
Step 4.2, the technological parameter formally welded is：
Tungsten electrode diameter：2.4mm, arc voltage：8.5V~9.5V,
Welding current：Peak value：50A~65A, base value：45A~55A
Speed of welding：V=100mm/min~110mm/min,
Positive argon flow：15~20L/min, back side argon flow：8~15L/min.
4. 1.5mm Titanium alloy TA15 according to claim 1 is not added an automatic TIG welding and connects method, which is characterized in that described
Step 5 postwelding quality examination include the following steps：
Step 5.1：Postwelding is using visually or by means of 10 times or less magnifying glasses to automatic TIG welding seam progress presentation quality inspection；
Step 5.2：Postwelding carries out non-destructive testing automatic TIG welding seam using X-ray, and weldquality meets in QJ1666A-2011
I grades of level weld seam requirements；
Step 5.3：Room temperature tensile sample is taken to automatic TIG welding sewing, carries out connector room temperature stretching mechanical property testing, weld seam is normal
Warm tensile strength is not less than the 95% of basis material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810804448.7A CN108856966A (en) | 2018-07-20 | 2018-07-20 | A kind of 1.5mm titanium alloy is not added an automatic TIG welding and connects method |
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| CN201810804448.7A CN108856966A (en) | 2018-07-20 | 2018-07-20 | A kind of 1.5mm titanium alloy is not added an automatic TIG welding and connects method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112192152A (en) * | 2020-09-29 | 2021-01-08 | 中国航发动力股份有限公司 | Annular curved surface titanium alloy workpiece and welding method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112192152A (en) * | 2020-09-29 | 2021-01-08 | 中国航发动力股份有限公司 | Annular curved surface titanium alloy workpiece and welding method thereof |
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Application publication date: 20181123 |
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