GTAW自激发超声工艺对AISI 316不锈钢堆焊层的有效性分析  

Validity Analysis of GTAW with Self-induced Ultrasound Process on AISI 316 Stainless Steel Weld Overlay

作　　者：金玉静 王大庆 陆皓[2] JIN Yujing;WANG Daqing;LU Hao(Department of Precision Manufacturing Engineering,Suzhou Vocational Institute of Industrial Technology,Suzhou 215104,China;School of Materials Science and Engineering,Shanghai Jiaotong University,Shanghai 200240,China)

机构地区：[1]苏州工业职业技术学院精密制造工程系,江苏苏州215104 [2]上海交通大学材料科学与工程学院,上海200240

出　　处：《热加工工艺》2024年第12期133-138,144,共7页Hot Working Technology

基　　金：国家重点研发计划项目(2018YFA0702900);国家自然科学基金项目(52275354);江苏省高校“青蓝工程”资助项目(苏教师函[2023]27号);江苏省高职院校青年教师企业实践资助项目(2023QYSJ107);苏州工业职业技术学院自然与社科培育项目(2022kypy11);苏州工业职业技术学院科研启动经费(2017kyqd009)。

摘　　要：通过自行搭建GTAW自激发超声波焊接试验平台,研究了电弧自激发超声工艺对AISI316不锈钢堆焊层的有效性。结果表明,电弧图像和声压两方面的测试均反映出所搭建平台的工作性能和自激发超声波工艺的有效性,可在无需添加额外设备的情况下实现焊缝的晶粒细化。当超声频率为60 kHz,振幅电流为10 A时,焊缝熔深可增深59.67%,熔宽可缩小30.14%。对于AISI 316不锈钢堆焊层工件熔池系统而言,40~60 kHz接近其固有频率,更有利于通过抑制枝晶生长获得细化的晶粒。The validity of arc self-induced ultrasonic welding process on AISI316 stainless steel weld overlay was investigated by building a GTAW self-induced ultrasonic welding experimental platform.The results show that the testing of arc images and sound pressure reflects the working performance of the built platform and the validity of self-induced ultrasonic technology,which can achieve grain refinement of the weld seam without additional equipment.When the ultrasonic frequency is 60 kHz and the amplitude current is 10 A,the weld penetration depth can be increased by 59.67%,and the fusion width can be reduced by 30.14%.For the AISI 316 stainless steel weld overlay workpiece melt pool system,40-60 kHz is close to its natural frequency,which is more conducive to obtain refined grains by inhibiting dendrite growth.

关 键 词：GTAW 超声工艺 自激发 AISI316不锈钢 微观组织 

分 类 号：TG455[金属学及工艺—焊接]