铝/钢异种材料超声辅助激光熔钎焊界面控制及性能研究  

The Interface IMC Control and Properties of Ultrasonic Assisted Laser Welding-Brazing of Aluminum/Steel Dissimilar Materials

作　　者：季明月 桑文雅 解玉坤 胡桂领 Ji Mingyue;Sang Wenya;Xie Yukun;Hu Guiling(College of Mechanical and Electrical Engineering,Henan Vocational University of Science and Technology,Zhoukou 4660o0,Henan,China)

机构地区：[1]河南科技职业大学机电工程学院,河南周口466000

出　　处：《应用激光》2025年第1期1-8,共8页Applied Laser

基　　金：河南省高校人文社会科学研究一般项目(2022-ZDJH-0092);河南省科技攻关项目(252102220005)。

摘　　要：针对铝/钢异种合金超声-激光复合熔钎焊进行了相关研究,并对比分析不同超声频率下接头的成形质量与组织性能。在不施加超声振动时,铝液在不锈钢表面的铺展润湿能力较差,焊缝成形不良,存在较多的咬边和焊瘤缺陷;熔焊区存在少量的气孔缺陷,界面IMC为锯齿状和大尺寸细针状金属间化合物;接头抗拉强度和延伸率为164 MPa和5.5%。在超声振动频率为60 Hz时,焊缝成形质量显著提高,IMC呈平面形态,厚度仅为1~3μm,接头抗拉强度和断后伸长率分比为192 MPa和8.4%。Aluminum/steel dissimilar alloys were joined by ultrasonic assisted laser welding-brazing technology,and the forming quality,microstructure and mechanical properties of the joints welded at different ultrasonic vibration frequencies were compared and analyzed.When the ultrasonic vibration is 0 Hz,the spreading wetting ability of liquid aluminum on the surface of stainless steel was so poor that the weld forming quality was decreased,and the biting edge and welding tumor defect were detected.Besides,some porosity defects existed in the fusion welding zone,and the IMC with the shapes of zigzag and fine acicular was found in the brazing interface.A tensile strength of 164 MPa and elongation of 5.5%were obtained,respectively.When the ultrasonic vibration frequency was 60 Hz,the weld forming quality becomes better,the IMC was flat,the thickness of IMC was only 1~3μm,and the tensile strength and elongation after breaking were 192 MPa and 8.4%,respectively.

关 键 词：异种金属 激光熔钎焊 超声振动 界面形貌 力学性能 

分 类 号：TG401[金属学及工艺—焊接]