CN112518121A - Laser welding method for medium-thickness dissimilar aluminum alloy material - Google Patents
Laser welding method for medium-thickness dissimilar aluminum alloy material Download PDFInfo
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- CN112518121A CN112518121A CN202011359917.2A CN202011359917A CN112518121A CN 112518121 A CN112518121 A CN 112518121A CN 202011359917 A CN202011359917 A CN 202011359917A CN 112518121 A CN112518121 A CN 112518121A
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- 238000003466 welding Methods 0.000 title claims abstract description 153
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 86
- 239000000956 alloy Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 41
- 210000001503 joint Anatomy 0.000 claims abstract description 23
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 16
- 230000001681 protective effect Effects 0.000 claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 7
- 239000010953 base metal Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000002932 luster Substances 0.000 claims description 4
- 238000005554 pickling Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000003344 environmental pollutant Substances 0.000 claims description 3
- 231100000719 pollutant Toxicity 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 7
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000010894 electron beam technology Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012876 topography Methods 0.000 description 2
- 229910018134 Al-Mg Inorganic materials 0.000 description 1
- 229910018467 Al—Mg Inorganic materials 0.000 description 1
- 229910018566 Al—Si—Mg Inorganic materials 0.000 description 1
- 229910001361 White metal Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/0093—Working by laser beam, e.g. welding, cutting or boring combined with mechanical machining or metal-working covered by other subclasses than B23K
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/60—Preliminary treatment
-
- 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
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/10—Aluminium or alloys thereof
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a laser welding method of a medium-thickness heterogeneous 5A06/ZL114A aluminum alloy material, wherein a butt joint of a workpiece to be welded with the thickness of 6mm is fixed and arranged on a laser welding working platform, and the welding method adopts defocusing amount +3mm, laser power 5000W, welding speed 0.04m/min, protective gas flow 30L/min, swinging scanning frequency 250Hz, scanning amplitude 2mm and scanning mode '∞' shaped positioning welding; formal welding is carried out by adopting a defocusing amount of +3mm, laser power of 6800-7000W, protective gas flow of 30L/min, a swinging scanning frequency of 250Hz, a scanning amplitude of 1-2mm and a scanning mode of infinity. And during formal welding, the laser spot is offset by 0.3-0.5mm from one side of the ZL114A alloy plate. The invention can effectively avoid the occurrence of the defects of cracks and air holes in the laser welding seam of the medium-thickness dissimilar 5A06/ZL114A aluminum alloy structure, the welding seam formed by welding is smooth in transition, the internal quality meets the requirement of the I-grade welding seam of the aerospace standard, and the comprehensive mechanical property of the welding seam is excellent.
Description
Technical Field
The invention belongs to the technical field of aluminum alloy laser welding, and relates to a laser welding method for a medium-thickness heterogeneous 5A06/ZL114A aluminum alloy material.
Background
With the development of the aerospace industry, the requirements of aircrafts on technical and combat indexes such as long range, high stealth capacity and high speed are increasingly improved. Important structural components of aircrafts such as an oil tank cabin and the like are developed from a traditional 'casting + welding' structure form to a 'metal plate + welding' structure form with higher lightweight degree, and the structural components are also changed from regular shapes to complex special-shaped structures gradually. The aluminum alloy is an important structural material in the aerospace field due to the fact that the aluminum alloy has low density, good specific strength, excellent corrosion resistance and excellent weldability. Among them, 5A06 aluminum alloy and ZL114A aluminum alloy material are widely used. The 5A06 aluminum alloy is Al-Mg series antirust aluminum and has the characteristics of higher strength, good corrosion stability, good weldability and the like. The ZL114A aluminum alloy is heat-treatment-strengthened Al-Si-Mg series cast aluminum alloy, and has good mechanical property, corrosion resistance and welding performance.
In the practical production of aerospace products, in order to meet different use requirements, the requirement of connecting 5A06 and ZL114A aluminum alloys is increasing, so that the processing cost is reduced under the condition of not damaging the overall performance of a component, and the welding of dissimilar aluminum alloy materials is involved. At present, the welding method of the aluminum alloy material with the thickness of 5A06/ZL114A in the range of 6-8 mm mainly comprises argon arc welding, laser welding, electron beam welding and the like. These methods all have some disadvantages. Argon arc welding is the most common method for titanium alloy, is a very suitable method for connecting thin plates and backing welding, but has the disadvantages of large heat input, slow welding speed, large welding deformation and thick weld joint structure; the welding seam is easy to generate air holes and welding defects of tungsten and the like. The electron beam welding has the advantages of high welding speed, small welding heat input, high welding seam internal quality and the like, but because the electron beam welding is carried out in a vacuum environment, the automation is difficult to realize, the welding efficiency is low, and the welding cost is high. The laser welding has the advantages of high energy density, high welding speed, large depth-to-width ratio, strong adaptability, easy realization of automation and the like, and can meet the requirements of complicated and various structures of aerospace products in the future.
At present, laser welding of aluminum alloy is mainly focused on welding of 1mm-5mm thin plates at home and abroad, and laser welding research of 6-8 mm medium-thickness dissimilar aluminum alloy is few. Along with the increase of the thickness of the joint, the laser welding power is correspondingly improved, the volatilization of Mg strengthening phase elements in the joint is serious, and the problems of air holes in the welding seam and the reduction of mechanical properties are obvious. The development of an effective laser welding method for medium-thickness dissimilar aluminum alloy materials is urgent because of the lack of a laser welding process method for controlling defects such as laser welding seam cracks and air holes of medium-thickness dissimilar aluminum alloys.
Disclosure of Invention
The invention aims to overcome the defects and provide a more effective laser welding method for medium-thickness heterogeneous 5A06/ZL114A aluminum alloy materials, the formed welding seam has good appearance quality and internal quality, the joint of the welding seam is continuous and uniform, no crack and incomplete penetration exist in the welding seam, the welding quality meets the I-grade welding seam requirement in the standard of QJ20660 aluminum alloy laser welding technical requirement, and the mechanical property of the welding seam is excellent.
In order to achieve the above purpose, the invention provides the following technical scheme:
a laser welding method of a medium-thickness dissimilar aluminum alloy material is provided, wherein the dissimilar aluminum alloy material is an aluminum alloy plate with a model number of 5A06 and a model number of ZL114A, and the welding method comprises the following steps:
(1) pretreating an aluminum alloy workpiece to be welded;
(2) fixing a butt joint or a bottom locking butt joint of workpieces to be welded of dissimilar aluminum alloys of 5A06 and ZL114A on a laser welding workbench, wherein the thickness of the dissimilar aluminum alloy joints of 5A06 and ZL114A is 6-8 mm;
(3) and carrying out positioning welding on the butt joint of the workpiece to be welded by adopting laser, wherein the parameters of the positioning welding are as follows: defocusing amount is +3mm, laser power is 4000-;
(4) and formally welding the butt joint by adopting laser, wherein the formally welding parameters are as follows: defocusing amount is +3mm, laser power is 6800-7000W, protective gas flow is 25-35L/min, swing scanning frequency is 200-300Hz, and scanning amplitude is 1-2 mm;
further, the pretreatment process in the step (1) comprises the steps of pickling and drying an aluminum alloy workpiece to be welded, carefully polishing and cleaning a joint part by using a steel wire brusher until silvery white metallic luster is exposed on the surface of the alloy, and then wiping the surface clean by using alcohol;
further, in the step (2), the step difference between the 5A06 and ZL114A dissimilar aluminum alloy plates is not more than 10% of the wall thickness of the base metal when the dissimilar aluminum alloy plates are butted;
further, in the step (2), the maximum gap of the welding line after the alloy plate is fixed is not more than 0.2 mm;
further, in the step (3), the length of the tack welds is 20-30 mm, and the tack weld interval is 50-70 mm;
further, in the step (4), when the main welding is carried out, the laser spot is offset by 0.3-0.5mm from one side of the ZL114A alloy plate.
Further, in the step (3), the scanning mode is '∞' font
Further, in step (4), the "∞" font is scanned.
Further, the laser welding method for the medium-thickness dissimilar aluminum alloy material further comprises a cleaning step after welding, wherein the cleaning step is to polish and clean the surface of a welding seam to remove pollutants and oxide layers on the surface.
Further, in the step (1), the 5A06 aluminum alloy is arranged at the lock bottom when the lock bottom is butted.
Compared with the prior art, the invention has the following beneficial effects:
(1) the welding method adopts laser welding to realize the welding of the heterogeneous aluminum alloy material with the medium thickness of 6-8 mm, the welding seam requirement meets the I-grade welding seam requirement in the standard of QJ20660 aluminum alloy laser welding technical requirement, the comprehensive mechanical property of the welding seam is excellent, and the tensile property exceeds more than 80 percent of the intensity of ZL114A aluminum alloy base metal.
(2) The invention adopts the swinging high-power laser beam to weld, can effectively avoid the occurrence of cracks and air hole defects inside the welding seam, and the welding seam formed by welding is smooth in transition.
(3) According to the invention, the optimal range of each parameter of the tack welding and formal welding steps in the laser welding process is determined through a large number of experiments, and the welding seam can meet the I-level welding seam requirement in the standard of QJ20660 technical requirement for aluminum alloy laser welding in the parameter range.
Drawings
FIG. 1 is a schematic view of direct butt joint of 5A06/ZL114A dissimilar aluminum alloy pieces provided in example 1 of the present invention;
FIG. 2 is a schematic view of the bottom-locking butt joint of a 5A06/ZL114A dissimilar aluminum alloy piece provided in example 1 of the present invention;
FIG. 3 is a schematic view of a "∞" shaped scanning mode provided in embodiment 1 of the present invention;
FIG. 4 is a surface topography of a laser weld of a dissimilar aluminum alloy of 5A06/ZL114A with a thickness of 6mm in example 1 of the present invention;
FIG. 5 is a surface topography of a laser weld of a dissimilar aluminum alloy of 5A06/ZL114A with a thickness of 6mm in example 2 of the invention.
Detailed Description
The features and advantages of the present invention will become more apparent and appreciated from the following detailed description of the invention.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The invention provides a laser welding method of medium-thickness dissimilar aluminum alloy materials, wherein the dissimilar aluminum alloy materials are an aluminum alloy plate with a model number of 5A06 and an aluminum alloy plate with a model number of ZL114A, and the welding method comprises the following steps:
(1) pretreating an aluminum alloy workpiece to be welded;
(2) fixing a butt joint or bottom-locking butt joint of workpieces to be welded of dissimilar aluminum alloys of 5A06 and ZL114A on a laser welding workbench, wherein a direct butt joint schematic diagram is shown in figure 1, a bottom-locking butt joint schematic diagram is shown in figure 2, and the thickness of the dissimilar aluminum alloy joint of 5A06 and ZL114A is 6-8 mm;
(3) and carrying out positioning welding on the butt joint of the workpiece to be welded by adopting laser, wherein the parameters of the positioning welding are as follows: defocusing amount is +3mm, laser power is 4000-;
(4) and formally welding the butt joint by adopting laser, wherein the formally welding parameters are as follows: defocusing amount is +3mm, laser power is 6800-7000W, protective gas flow is 25-35L/min, swing scanning frequency is 200-300Hz, and scanning amplitude is 1-2 mm;
further, the pretreatment process in the step (1) comprises the steps of pickling and drying an aluminum alloy workpiece to be welded, carefully polishing and cleaning a joint part by using a steel wire brusher until silvery white metallic luster is exposed on the surface of the alloy, and then wiping the surface clean by using alcohol;
further, in the step (2), the step difference between the 5A06 and ZL114A dissimilar aluminum alloy plates is not more than 10% of the wall thickness of the base metal when the dissimilar aluminum alloy plates are butted;
further, in the step (2), the maximum gap of the welding line after the alloy plate is fixed is not more than 0.2 mm;
further, in the step (3), the length of the tack welds is 20-30 mm, and the tack weld interval is 50-70 mm;
further, in the step (4), when the main welding is carried out, the laser spot is offset by 0.3-0.5mm from one side of the ZL114A alloy plate.
Further, in the step (3), in order to effectively reduce the porosity inside the weld joint, the scanning mode is '∞' shaped, and the scanning frequency is 250 Hz; as shown in fig. 3, 1 indicates a weld, 2 indicates a welding direction, and 3 indicates a laser "∞" scanning system.
Further, in step (4), the "∞" font is scanned.
Further, the laser welding method for the medium-thickness dissimilar aluminum alloy material further comprises a cleaning step after welding, wherein the cleaning step is to polish and clean the surface of a welding seam to remove pollutants and oxide layers on the surface.
Further, in the step (1), the 5A06 aluminum alloy is arranged at the lock bottom when the lock bottom is butted.
Preferably, in the laser welding method of the aluminum alloy material with the medium thickness and the different types, in the step (3) and the step (4), the flow rate of the protective gas is 30L/min;
further, in the laser welding method of the medium-thickness dissimilar aluminum alloy material, in the step (3), the laser power is 5000w, and the scanning amplitude is 2 mm;
the 5A06 alloy material adopted in the steps of the invention comprises the following chemical components in percentage by weight: mg-6.28%, Mn-0.58%, Ti-0.16%, Fe-0.17%, and the balance of Al; the adopted ZL114 alloy material comprises the following chemical components in percentage by weight: si- (6.5-7.5)%, Mg- (0.25-0.45)%, Ti- (0.08-0.2)%, and Al in balance;
example 1
6mm thick dissimilar 5A06/ZL114A aluminum alloy material is subjected to laser welding. As shown in fig. 2, the joint structure is in the form of a butt joint of the lock bottom, 5a06 aluminum alloy is disposed at the lock bottom, and ZL114A aluminum alloy is disposed at the upper side of the lock bottom.
(1) Cleaning before welding, namely pickling and drying the 5A06 and/ZL 114A dissimilar aluminum alloy plates, carefully polishing and cleaning joint parts by using a steel wire brush until silvery white metal luster is exposed on the alloy surfaces, and wiping the alloy surfaces clean by using alcohol;
(2) assembling, namely fixing the aluminum alloy plate firmly, and ensuring that the maximum butt joint gap of a welding line is not more than 0.15mm and the step difference is not more than 10% of the thickness of the base metal; placing the assembled 5A06 and/ZL 114A aluminum alloy plates on a laser welding workbench, and fastening and fixing the aluminum alloy plates well;
(3) and carrying out uniform laser tack welding on the workpiece along the welding line, wherein the length of each segment is 25mm, and the distance between the segments is 50 mm. The welding parameters are as follows: defocusing amount is +3mm, laser power is 5000W, welding speed is 0.04m/min, shielding gas flow is 30L/min, swinging scanning frequency is 250Hz, scanning amplitude is 2mm, and scanning mode is infinity;
(4) and (3) carrying out formal welding on the workpiece, wherein the welding parameters of the formal welding are as follows: defocusing amount is +3mm, laser power is 6800W, the flow of protective gas is 30L/min, the swinging scanning frequency is 250Hz, the scanning amplitude is 1mm, and the scanning mode is infinity-shaped; the laser spot of the welding process is offset by 0.3mm from one side of the ZL114A alloy plate.
(5) And cleaning after welding.
The butt weld obtained by the welding method has a smooth and attractive surface. As shown in figure 4, the weld joint has good forming quality and no defects such as cracks, inclusions and the like. The quality of the welding seam meets the I-grade welding seam in the standard of QJ20660 aluminum alloy laser welding technical requirement. The ultimate tensile strength of the joint reaches 258MPa, which exceeds 90 percent of the tensile strength of ZL114A alloy parent metal, and the elongation after fracture is 6.2 percent.
Example 2
6mm thick dissimilar 5A06/ZL114A aluminum alloy material is subjected to laser welding. As shown in fig. 2, the joint structure is in the form of a lock bottom butt joint.
(1) Cleaning before welding, namely performing oil removal, acid cleaning, drying, grinding and scraping treatment on a 5A06 and/ZL 114A dissimilar aluminum alloy plate;
(2) assembling, namely firmly fixing the titanium alloy plate, ensuring that the maximum butt joint gap of a welding seam is not more than 0.15mm and the step difference is not more than 10% of the thickness of the base metal, placing the assembled 5A06 and/ZL 114A aluminum alloy plate on a laser welding workbench, and tightening and fixing the aluminum alloy plate well;
(3) and carrying out uniform laser tack welding on the workpiece along the welding line, wherein the length of each segment is 30mm, and the interval is 70 mm. The welding parameters are as follows: defocusing amount is +3mm, laser power is 5000W, welding speed is 0.04m/min, shielding gas flow is 30L/min, swinging scanning frequency is 250Hz, scanning amplitude is 2mm, and scanning mode is infinity-shaped.
5) And (3) carrying out formal welding on the workpiece, wherein the welding parameters of the formal welding are as follows: defocusing amount is +3mm, laser power is 7000W, protective gas flow is 30L/min, swing scanning frequency is 250Hz, scanning amplitude is 2mm, and scanning mode is infinity-shaped; the laser spot of the welding process is offset by 0.5mm from one side of the ZL114A alloy plate.
6) And cleaning after welding.
The butt weld obtained by the welding method has a smooth and attractive surface. As shown in the attached figure 5, the weld joint has good forming quality and no defects such as cracks, inclusions and the like. The quality of the welding seam meets the I-grade welding seam in the standard of QJ20660 aluminum alloy laser welding technical requirement. The ultimate tensile strength of the joint reaches 252MPa, which exceeds 90 percent of the tensile strength of ZL114A alloy parent metal, and the elongation after fracture is 5.8 percent.
The invention has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to be construed in a limiting sense. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the technical solution of the present invention and its embodiments without departing from the spirit and scope of the present invention, which fall within the scope of the present invention. The scope of the invention is defined by the appended claims.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (10)
1. A laser welding method of aluminum alloy materials with different intermediate thicknesses is characterized in that the aluminum alloy materials with different intermediate thicknesses are aluminum alloy plates with the models of 5A06 and ZL114A, and the welding method comprises the following steps:
(1) pretreating an aluminum alloy workpiece to be welded;
(2) fixing a butt joint or a bottom locking butt joint of workpieces to be welded of dissimilar aluminum alloys of 5A06 and ZL114A on a laser welding workbench, wherein the thickness of the dissimilar aluminum alloy joints of 5A06 and ZL114A is 6-8 mm;
(3) and carrying out positioning welding on the butt joint of the workpiece to be welded by adopting laser, wherein the parameters of the positioning welding are as follows: defocusing amount is +3mm, laser power is 4000-;
(4) and formally welding the butt joint by adopting laser, wherein the formally welding parameters are as follows: defocusing amount is +3mm, laser power is 6800-7000W, protective gas flow is 25-35L/min, swing scanning frequency is 200-300Hz, and scanning amplitude is 1-2 mm.
2. The laser welding method for the medium-thickness dissimilar aluminum alloy material according to claim 1, wherein the pretreatment process in the step (1) comprises the steps of pickling and drying an aluminum alloy workpiece to be welded, carefully polishing and cleaning a joint part by using a steel wire brusher until silvery white metallic luster is exposed on the surface of the alloy, and then wiping the surface clean by using alcohol.
3. The laser welding method for medium-thickness dissimilar aluminum alloy materials according to claim 1, wherein in the step (2), the step difference of butting 5A06 and ZL114A dissimilar aluminum alloy plates is not more than 10% of the wall thickness of the base metal.
4. The laser welding method for the medium-thickness dissimilar aluminum alloy material according to claim 1, wherein in the step (2), the maximum gap of the welding seam after the alloy plate is fixed is not more than 0.2 mm.
5. The laser welding method for the medium-thickness dissimilar aluminum alloy material as claimed in claim 1, wherein in the step (3), the tack welding length is 20-30 mm, and the tack welding pitch is 50-70 mm.
6. The method for laser welding of an aluminum alloy material with a medium thickness as claimed in claim 1, wherein in the step (4), the laser spot is offset by 0.3-0.5mm from one side of the alloy plate ZL114A during the formal welding.
7. The laser welding method for aluminum alloy materials with medium thickness as claimed in claim 1, wherein in the step (3), the scanning mode is "∞" shaped.
8. The laser welding method for aluminum alloy materials with medium thickness as claimed in claim 1, wherein in the step (4), the scanning mode is "∞" shaped.
9. The laser welding method for the medium-thickness dissimilar aluminum alloy material according to claim 1, further comprising a post-welding cleaning step of polishing and cleaning the surface of the weld joint to remove pollutants and oxide layers on the surface.
10. The laser welding method for the medium-thickness dissimilar aluminum alloy material according to claim 1, wherein in the step (1), the 5A06 aluminum alloy is arranged at the lock bottom when the lock bottom is butted.
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| CN114043084A (en) * | 2022-01-13 | 2022-02-15 | 江苏迅镭激光科技有限公司 | Method for laser welding of aluminum alloy cooling plate |
| CN114559155A (en) * | 2022-04-01 | 2022-05-31 | 合肥国轩高科动力能源有限公司 | Laser welding system and process |
| CN115415744A (en) * | 2022-08-31 | 2022-12-02 | 江西金科力实业有限公司 | Single-side welding forming process and device for airplane auxiliary fuel tank |
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| CN114043084B (en) * | 2022-01-13 | 2022-04-19 | 江苏迅镭激光科技有限公司 | Method for laser welding of aluminum alloy cooling plate |
| CN114559155A (en) * | 2022-04-01 | 2022-05-31 | 合肥国轩高科动力能源有限公司 | Laser welding system and process |
| CN115415744A (en) * | 2022-08-31 | 2022-12-02 | 江西金科力实业有限公司 | Single-side welding forming process and device for airplane auxiliary fuel tank |
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