铝-钢脉冲DE-GMAW与CMT熔钎焊热循环曲线测试与对比  

Test of thermal cycling curve of pulsed melting-soldering welding DE-GMAW and CMT for bonding steel with aluminum

作　　者：石玗[1] 王钊[2] 董兵天 卢立晖[2] 黄健康[1] 樊丁[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料重点实验室,甘肃兰州730050 [2]兰州理工大学有色金属合金及加工教育部重点实验室,甘肃兰州730050 [3]甘肃有色冶金职业技术学院,甘肃金昌737100

出　　处：《兰州理工大学学报》2012年第4期23-26,共4页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(51165023);兰州理工大学优秀青年教师培养计划(Q200901);陇原青年创新人才扶持计划的资助

摘　　要：介绍一种新的铝-钢异种金属焊接方法脉冲旁路耦合电弧MIG焊(pulsed DE-GMAW),将该方法应用于铝和镀锌钢板的焊接,得到成型良好的焊缝.采用接触式测量法测量pulsed DE-GMAW法在不同焊接参数下的热循环曲线,并与CMT进行对比分析,结果表明:CMT法通过推拉丝及短路波形控制能减小焊接过程中的热输入;而pulsed DE-GMAW法通过增加旁路电流达到分流的目的,也可以降低输入母材的热量,2种方法的热输入控制效果相当,均能较好实现铝-钢异种金属的焊接.A new method for heterogeneous metal welding of aluminum and steel （pulsed DE-GMAW） was introduced. A well-formed weld was obtained with this method to weld aluminum and galvanized steel plate. The contact-type measurement method was employed to test the thermal cycling curve of welding with pulsed DE-GMAW with different welding parameters. Then the test result was compared to that with CMT. The results showed that CMT could reduce welding heat-input by means of pushing-drawing the welding wire and controlling the short-circuit waveform. And by using the pulsed DE-GMAW, the heat- input could be reduced by adding by-pass current. Whether pulsed DE-GMAW or CMT could equally control the heat-input better to realize welding heterogeneous metal of aluminum and steel.

关 键 词：脉冲旁路耦合电弧MIG焊 CMT 铝-钢 热循环曲线 

分 类 号：TG409[金属学及工艺—焊接]