表面状态对AZ31B镁合金薄带超声波焊接性的影响  

Effect of surface condition on AZ31B magnesium alloy strip ultrasonic welding

作　　者：张青来[1] 王粒粒[1] 胡永学[1] 

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013

出　　处：《焊接学报》2007年第7期9-12,共4页Transactions of The China Welding Institution

基　　金：国家863高科技计划项目(2003AA331120);江苏大学基金资助项目(05JDG009)

摘　　要：研究和讨论了焊接材料厚度、表面状态、中间层材料等因素对AZ31B镁合金超声焊接性的影响。结果表明，成功焊接的镁金属薄带（不大于0．3mm）被强制分离将导致与焊点交界处的未被焊接的材料撕裂开，界面接合强度可达到3-10MPa；表面状态对镁合金薄带焊接的界面接合强度影响较小，焊接自身包含对焊接件表面破碎及清理作用；焊接区域的温度升高与焊接材料厚度成反比，无需外加温度；中间层材料的选择对Mg／Mg界面超声波焊接有一定作用，有待于进一步研究及探讨；可采用多触头或滚焊方式实现大面积超声波镁合金薄带焊接。The effects of hase material thickness, surface condition and interlayer material on AZ31B magnesium alloy ultrasonic welding were investigated. The result showed the material near the welding contact would be torn in the test of shear strength, and surface bonding strength could achieve about 3-10 MPa. The effect of surface condition on the surface binding strength of the magnesium alloy strip welding was relatively small for ultrasonic welding could break and clean the welding surface. The additive temperature was not needed on ultrasonic welding. And the welding area temperature promotion was inverse proportion to the welding material thickness. The results also showed the choice of interlayer material was useful to the Mg/Mg interface ultrasonic welding.

关 键 词：镁合金 薄带 超声波焊接 参数 

分 类 号：TG146.22[一般工业技术—材料科学与工程]