激光作用下CuSi_3在镀锌钢板表面的润湿行为研究  

Research on Wetting Behavior of Zn-Coated Steel with CuSi_3 Filler Metal by Laser Beam

作　　者：马凯[1] 于治水[1] 张培磊[1] 卢云龙[1] 褚振涛[1] 史海川[1] 

机构地区：[1]上海工程技术大学材料工程学院,上海201620

出　　处：《上海工程技术大学学报》2013年第4期293-297,共5页Journal of Shanghai University of Engineering Science

基　　金：国家自然科学基金资助项目(51375294);上海工程技术大学研究生科研创新资助项目(13KY0509;13KY0510);上海市自然科学基金资助项目(12ZR1444500);上海市科委能力建设资助项目(13160501200)

摘　　要：实验研究了影响CuSi3在镀锌钢板上润湿铺展行为的主要因素:激光功率、离焦量、激光加热时间以及母材表面是否存在镀锌层.研究钎料铺展直径随着这些参数变化的规律,并在此基础上进行了显微硬度测试.实验结果表明,离焦量对铺展直径的影响最大;显微硬度测试结果显示,当钎料在母材上润湿铺展良好时,能够得到力学性能优异的接头,界面处硬度达到镀锌钢板的90%,为更好地利用CuSi3钎料激光钎焊镀锌钢板提供了理论依据.The main factors affecting the wetting behavior of CuSi3 metal on Zn-coated steel were studied, including laser power, defocusing distance, heating time and existence of zinc coating on the surface of base metal. The variation rules of spreading diameter changing with these parameters were analyzed and microhardness test was conducted. The result indicates that defocusing distance has the greatest impact on spreading diameter. The microhardness result shows that an excellent mechanical property joint can be obtained when filler metal is spreaded well on base metal,and the microhardness of interface is about 90% of the base metal＇s,which provided a theoretical foundation for laser brazing with CuSi3 filler metal.

关 键 词：激光钎焊 镀锌钢板 润湿 铺展行为 离焦量 

分 类 号：TG454[金属学及工艺—焊接]