激光焊接速度对匙孔行为影响的试验分析  

Experimental Analysis of the Influence of Laser Welding Speed on Keyhole Behavior

作　　者：李敏[1,2] 荣佑民[3] Li Min;Rong Youmin(Key laboratory of Optoelectronic Chemical Materials and Devices ,Ministry of Education ,Jianghan University,Wuhan,Hubei 430056,China;School of Chemical and Environmental Engineering,Jianghan University,Wuhan ,Hubei 430056,China;School of Mechanical Science and Engineering ,Huazhong University of Science and Technology,Wuhan,Hubei 430074,China)

机构地区：[1]江汉大学光电化学材料与器件教育部重点实验室,湖北武汉430056 [2]江汉大学化学与环境工程学院,湖北武汉430056 [3]华中科技大学机械科学与工程学院,湖北武汉430074

出　　处：《应用激光》2018年第6期959-962,共4页Applied Laser

基　　金：中国博士后科学基金资助项目(项目编号:2017M622427);湖北省博士后科技活动择优资助项目(项目编号:G14)

摘　　要：选取耐高温石英玻璃作为观测介质,试验研究了焊接速度对动态匙孔及焊缝质量的影响行为。首先,瞬态匙孔存在波动行为,其1.0、1.5和2.0m/min不同焊接速度下的平均深度分别为4.57、4.98和2.01mm;其次,随着焊接速度的增加,焊缝上宽度从2.1、1.2至0.7mm逐渐变窄;进一步,1.5m/min和2.0m/min焊接速度下焊缝微观组织出现鳞状奥氏体;最后,在给定的三种不同焊接速度下,焊接速度1.5m/min情况下的匙孔动态行为更有助于获得好的焊缝形貌和可接受的微观组织。Experiment research of laser welding speed on the dynamic keyhole and the weld quality was focused through quartz glass with high temperature resistance.Firstly,the transient keyhole existed fluctuating behavior,the average depths at different welding speeds of 1.0,1.5,and 2.0m/min were 4.57,4.98 and 2.01 mm respectively.Secondly,as the welding speed increased,the weld upper width was gradually narrowed from 2.1,1.2to 0.7mm.Furthermore,the scaly austenite appeared in the microstructure of the weld at 1.5 m/min and 2.0 m/min welding speeds.Finally,at a given three different welding speeds,the keyhole dynamic behavior at a welding speed of 1.5m/min was more helpful in obtaining agood weld profile and acceptable microstructure.

关 键 词：激光焊接 匙孔动态行为 焊缝形貌 微观组织 

分 类 号：TG456.7[金属学及工艺—焊接]