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Titanium alloy angular joint welding method based on double-beam laser

A welding method and double-beam technology, which are applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of low welding efficiency and large deformation of titanium alloy angle profiles, and achieve good process applicability, reduce welding deformation, The effect of improving welding efficiency

Pending Publication Date: 2021-07-30
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of low welding efficiency and large deformation after welding of medium-thin (2mm-8mm) titanium alloy angle profiles, the purpose of the present invention is to provide a welding method for titanium alloy angle joints based on double-beam laser, which can realize The laser welding of the load-bearing structural corner weld with a web thickness of 2mm-8mm is formed at one time, and meets the requirements of root penetration and weld leg size at the same time

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  • Titanium alloy angular joint welding method based on double-beam laser
  • Titanium alloy angular joint welding method based on double-beam laser
  • Titanium alloy angular joint welding method based on double-beam laser

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Effect test

Embodiment 1

[0039] Such as figure 2 and image 3 As shown, the appearance of the titanium alloy T-shaped corner joint double-beam laser welding joint and the macro-section of the weld seam. Double-sided welding one-time penetration forming, welding process specification: front laser power 4500w, rear laser power 3000w, defocus +10mm, welding speed 72cm / min, wire feeding speed 3m / min, welding front and back shielding gas Both are 99.99% pure argon. The surface of the double-beam laser welding joint is beautiful, silver-white, and the transition of the fillet weld is smooth. There are no defects on the surface such as cracks, unfused, undercuts, arc craters, spatters, welding tumors, etc., and the surface quality is good; the macroscopic view of the double-beam laser welding joint is On the surface of the section, the weld fusion is good, and there are no cracks, pores, inclusions, incomplete fusion, incomplete penetration, poor shape and size and other defects inside, and the internal q...

Embodiment 2

[0041] Such as Figure 4 and Figure 5As shown, the appearance of the titanium alloy T-shaped corner joint double-beam laser welding joint and the macro-section of the weld seam, the face plate is 8mm, the web is 4mm, and the fillet welds on both sides are welded by double-beam laser wire filler respectively to realize the T-shaped corner The joint is double-sided welded for one penetration forming, and the welding process specification is selected: front laser power 5000w, rear laser power 3000w, defocus +10mm, welding speed 72cm / min, wire feeding speed 3m / min, welding front and back protection The gas is 99.99% pure argon. The surface of the double-beam laser welding joint is beautiful, silver-white, and the transition of the fillet weld is smooth. There are no defects on the surface such as cracks, unfused, undercuts, arc craters, spatters, welding tumors, etc., and the surface quality is good; the macroscopic view of the double-beam laser welding joint is On the surface ...

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Abstract

The invention relates to a titanium alloy angular joint welding method based on double-beam laser, and belongs to the technical field of metal material welding. According to the welding method, two beams of laser are emitted by a double-focus laser welding gun and are distributed front and back along a to-be-welded path, and the front laser beam carries out deep penetration welding by adopting relatively high power, and is used for implementing root penetration welding of an angular joint; and the rear laser carries out heat conduction welding by adopting a low-power pulse output, and is used for melting continuously fed welding wires so as to meet the requirement for the size of a weld leg. By the adoption of the method, laser welding one-time forming of the angular weld joint of a bearing structure with the web plate thickness of 2-8 mm can be implemented, meanwhile, the requirements for root penetration welding and the size of the weld leg are met, the equipment integration degree is high, flexibility and accessibility are good, the process applicability is good, the method is beneficial for improving the rear laser filler wire melting efficiency, no other heat sources such as an electric arc and the like are introduced in the whole welding process, and the method is beneficial for reducing the welding deformation.

Description

technical field [0001] The invention belongs to the technical field of metal material welding, and in particular relates to a welding method for titanium alloy corner joints based on a double-beam laser. Background technique [0002] For the laser welding of thin (2mm-8mm) plate angle profiles in titanium alloys of pressure-bearing structures, in order to meet the requirements of root penetration and weld leg size of titanium alloy angle joints at the same time, the traditional welding method is to open the groove, and then use tungsten Extreme argon arc welding (G angle AW) or molten gas shielded welding (GMAW) filling cover welding, welding efficiency is low, and deformation after welding is large. Laser welding angle profiles can be grooved. At present, there are two methods commonly used for laser welding angle profiles: one method is to use laser welding to make the bottom, to achieve root penetration, and then use GTAW, GMAW or laser filler wire to weld the cover surfa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/242B23K26/12B23K26/60B23K26/70
CPCB23K26/242B23K26/123B23K26/60B23K26/70
Inventor 刘甲马照伟雷小伟符成学付占波杜志博
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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