填充粉末对钢/铝异种合金激光深熔焊接头界面组织的影响  

Effects of Filler Powders on Microstructures and Properties of the Interface in the Welded Joints for Steel/Al Dissimilar Materials using Laser Keyhole Welding

作　　者：马彪[1] 崔丽[1] 钱伟[1] 杨武雄[2] 

机构地区：[1]北京工业大学材料科学与工程学院,北京100124 [2]北京工业大学激光工程研究院,北京100124

出　　处：《应用激光》2015年第4期441-444,共4页Applied Laser

基　　金：国家自然科学基金资助项目(项目编号:51475006);北京工业大学基础研究基金资助项目(项目编号:X4009012201401)

摘　　要：对5083铝合金和E36钢板异种合金接头进行激光深熔焊搭接实验,焊接过程中填充Ni、Zn、Sn不同合金粉末。利用金相显微镜、扫描电镜及能谱等微观分析方法,研究添加不同元素粉末对钢/铝激光深熔焊焊缝成形及界面组织的影响。研究结果表明,填充粉末的加入改善了界面金属间化合物的形貌,降低了Fe-Al金属间化合物的厚度,改善了接头界面金属间化合物层的塑韧性。Dissimilar joining of lapped E36 steel plates to aluminum alloy 5083 sheets was carried out by using laser keyhole welding process with the addition of Ni,Zn and Sn filler powders.By using optical microscopy,scanning electron microscopy,energy disperse spectroscopy,the microstructures and microscopic hardness of the welded joints with the filler powders were studied.The results show that the addition of powders into the weld joint can improve the morphology of the intermetallic compound（IMC）,reduce the thickness of Fe-Al IMC,and finally improve the ductility and toughness of the weld joints.

关 键 词：钢/铝异种合金 激光深熔焊 填充粉末 金属间化合物 

分 类 号：TG425[金属学及工艺—焊接]