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激光焊接工艺对GH188合金焊缝成形及力学性能的影响

Effect of Laser Welding Process on Weld Formation and Mechanical Property of GH188 Alloy

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摘要

研究了激光焊接工艺对GH188合金焊接接头焊缝成形及力学性能的影响。结果表明,高激光功率或低焊接速度对GH188合金焊缝成形不利,使焊缝背面存在飞溅和轻微咬边现象,接头焊缝区晶粒粗大且接头抗拉强度低。随着焊接速度的增大,焊缝宽度减小,焊缝背面飞溅减少;随着激光功率的增大,焊缝宽度增加,焊缝背面飞溅增多。当激光功率为2.8~3.2 kW、焊接速度为6 m/min时,焊缝成形和接头拉伸性能均较好。

Abstract

The effect of laser welding process on the weld formation and mechanical property of GH188 alloy weld joint is studied. The results show that a high laser power or a low welding speed is disadvantageous for the weld formation of GH188 alloy, there exists the phenomenons of spatter and slight undercut on the weld back, and the grain in weld zone of joint is coarse and the tensile strength of joint is low. With the increase of welding speed, the weld width and the spatter on the weld back both decrease. With the increase of laser power, the weld width and the spatter on the weld back both increase. When the laser power is in the range 2.8-3.2 kW and the welding speed is 6 m/min, the weld formation and tensile property of weld joint are both good.

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中图分类号:TG456.7

DOI:10.3788/lop54.041409

所属栏目:激光器与激光光学

收稿日期:2016-11-02

修改稿日期:2016-12-22

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芦伟:中航工业北京航空制造工程研究所高能束流加工技术重点实验室, 北京 100024
马旭颐:中航工业北京航空制造工程研究所高能束流加工技术重点实验室, 北京 100024
巩水利:中航工业北京航空制造工程研究所高能束流加工技术重点实验室, 北京 100024
杨璟:中航工业北京航空制造工程研究所高能束流加工技术重点实验室, 北京 100024

联系人作者:芦伟(luwei870808@126.com)

备注:芦伟(1988-),女,博士,工程师,主要从事激光加工方面的研究。

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引用该论文

Lu Wei,Ma Xuyi,Gong Shuili,Yang Jing. Effect of Laser Welding Process on Weld Formation and Mechanical Property of GH188 Alloy[J]. Laser & Optoelectronics Progress, 2017, 54(4): 041409

芦伟,马旭颐,巩水利,杨璟. 激光焊接工艺对GH188合金焊缝成形及力学性能的影响[J]. 激光与光电子学进展, 2017, 54(4): 041409

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