激光焊接工艺参数对温度场及力学性能的影响  

Effects of laser welding process parameters on temperature field and mechanical properties

作　　者：赵东升[1] 黄震宇[1] 缪唐军 刘玉君[1] 

机构地区：[1]大连理工大学工业装备结构分析国家重点实验室,船舶工程学院,辽宁大连116024

出　　处：《实验室科学》2017年第5期61-63,共3页Laboratory Science

基　　金：中央高校基本科研业务费(项目编号:DUT16QY45);大连理工大学教改基金(项目编号:MS2014089)

摘　　要：为了理解并掌握激光焊接的主要工艺参数,完成了不同工艺参数条件下的焊接温度场和接头抗拉强度的测量实验。实验结果表明,激光焊接的主要工艺参数功率、脉宽、频率和离焦量决定了焊接热输入量及分布,对焊接温度场和焊接接头的力学性能有着重要的影响。焊接热输入量过低或过高都会降低焊接接头的力学性能,通过实验可以综合考虑上述工艺参数的影响并进行优化。In order to understand the main process parameters of laser welding, experimental measure- ments of welding temperature field and welded joint tensile strength are completed under different process parameter conditions. The experimental results show that the main process parameters of laser welding, such as power, pulse width, frequency and defocusing amount, are decisive factors of weld- ing heat input and its distribution, as well as the welding temperature field and the mechanical proper- ties of welded joint. Mechanical properties of welded joint are reduced when welding heat input is too low or too high. The effects of process parameters mentioned above can be comprehensively considered and optimized by experiments.

关 键 词：激光焊 温度场 抗拉强度 焊接热输入 

分 类 号：TG456.7[金属学及工艺—焊接]