摘要
采用激光微焊接可以实现非接触的连接结构,适用于合金之间的封装处理。为提高机械动力连接结构钛合金TA2/不锈钢316L复合板的综合性能,采用高重频激光焊接方式进行制备。分析TA2/316L复合板接头强度,确定高重频激光焊接最优工艺参数:脉冲功率14μJ,离焦量0μm,重复频率500 kHz,焊接速度0.6 mm/s,接头强度可以提高至8.8 MPa,促进了焊接效率的明显提升。通过试验测试手段分析了焊接区横截断面性能。研究结果表明,熔融TA2渗透到316L内产生了许多凹坑,316L与TA2发生混合。对316L高重频激光烧蚀处理后,形成了高温等离子体并引起TA2表面发生熔融,对316L烧蚀微孔起到填充作用。TA2侧面形成了无规律分布的大量孔洞,316L侧面则产生了明显的凸起小包,316L表面存在大量TA2覆盖,能够紧密连接TA2/316L复合板。
The non-contact bonding structure can be realized by laser micro-welding,which is suitable for packaging between alloy.In order to improve the comprehensive performance of TA2/316 L composite plate with mechanical dynamic connection structure,the high repetition frequency laser welding was used to fabricate it.The joint strength of TA2/316 L composite plate was analyzed,and the optimal process parameters of high repetition frequency laser parameters were determined as follows:pulse power 14μJ,defocus 0μm,repetition rate 500 kHz,welding speed 0.6 mm/s,and the joint strength could be increased to 8.8 MPa,which promoted the obvious improvement of welding efficiency.The performance of transverse truncation surface in welding zone was analyzed by experimental test.Results show that the molten TA2 penetrates into 316 L to produce many pits,and 316 L is mixed with TA2.After 316 L high repetition laser ablation,high temperature plasma is formed and the surface of TA2 melts,filling 316 L ablated micropores.A large number of irregular distribution holes are formed on the side of TA2,and obvious raised packets are generated on the side of 316 L.A large number of TA2 covers exist on the surface of 316 L,which can closely connect TA2/316 L composite plate.
作者
冯金广
张建国
陈正学
Feng Jinguang;Zhang Jianguo;Chen Zhengxue(Intelligent Manufacturing College,Henan Vocational and Technical College,Zhengzhou 450046,China;School of Mechanical and Power Engineering,Henan Polytechnic University,Jiaozuo 454003,China;Henan Litian Tool Co.,Ltd.,Zhengzhou 450002,China)
出处
《应用激光》
CSCD
北大核心
2022年第8期1-6,共6页
Applied Laser
基金
河南省基础与前沿技术研究计划项目(152300410146)。
关键词
高重频激光
焊接
TA2
316L
参数优化
焊接区
微观组织
high repetition laser
welding
TA2
316L
parameter optimization
welding area
microstructure
