Misalignment Adaptability of TC4 Titanium Alloy Thin Plate Bottom-locking Joint Using Laser Welding

ZHANG Dengming; HU Peipei; ZUO Shanchao; CHEN Qin; GAO Jianxin

doi:10.7512/j.issn.1001-2303.2025.05.13

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Misalignment Adaptability of TC4 Titanium Alloy Thin Plate Bottom-locking Joint Using Laser Welding
Vol. 55, Issue 5, Pages: 94-99(2025)
Received：24 September 2024，

Revised：2025-02-05，

Published：20 May 2025
DOI： 10.7512/j.issn.1001-2303.2025.05.13
稿件说明：

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张登明，胡佩佩，左善超，等.TC4钛合金薄板锁底接头激光焊接错边适应性研究［J］.电焊机，2025，55（5）：94-99. DOI： 10.7512/j.issn.1001-2303.2025.05.13.

ZHANG Dengming, HU Peipei, ZUO Shanchao, et al.Misalignment Adaptability of TC4 Titanium Alloy Thin Plate Bottom-locking Joint Using Laser Welding[J].Electric Welding Machine, 2025, 55(5): 94-99. DOI： 10.7512/j.issn.1001-2303.2025.05.13.

摘要

针对2 mm TC4钛合金薄板锁底结构激光焊接错边适应性进行研究。结果表明，随着错边量的增大，焊缝成形均匀性下降，表面咬边和凹陷加大，错边量1.0 mm时焊缝表面完全凹陷；气孔数量随错边量增大先增多后减少。错边量为0~0.6 mm，可获得表面成形及内部质量均良好的焊缝。接头抗拉强度随错边量增大而降低，但错边量为0.6 mm时，接头的抗拉强度仍可达到1 050 MPa，拉伸试样断裂在焊缝靠近厚板侧边缘，断口呈韧性断裂特征。结果表明，TC4钛合金锁底接头激光焊接对错边具有一定的容忍度，错边量0.6 mm（壁厚30%）以内时，接头仍具有良好的成形与力学性能。该研究结果可为钛合金产品激光焊接生产应用提供参考，尤其对于大型结构件的装配精度控制具有指导意义。

Abstract

Research on the adaptability of laser welding misalignment for 2 mm TC4 titanium alloy thin plate lock bottom structure was conducted. The results show that with the increase of misalignment

the uniformity of weld formation decreases

surface bite and depression increase

and when the misalignment is 1.0 mm

the weld surface is completely depressed; the number of pores increases first and then decreases with the increase of misalignment. When the misalignment is 0-0.6 mm

a good surface formation and internal quality of the weld can be obtained. The tensile strength of the joint decreases with the increase of misalignment

but when the misalignment is 0.6 mm

the tensile strength of the joint can still reach 1 050 MPa

and the tensile specimen breaks near the edge of the thick plate side of the weld

and the fracture surface shows ductile fracture characteristics. The results show that TC4 titanium alloy lock bottom joint laser welding has a certain tolerance to misalignment

and when the misalignment is within 0.6 mm (30% of the wall thickness)

the joint still has good formation and mechanical properties. The research results can provide reference for the application of laser welding production of titanium alloy products

and have guiding significance for the assembly accuracy control of large-scale structural parts.

关键词

Keywords

references

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