Effect of Zn Vaporization on Wetting of Al-galvanized Steel in Cold Metal Transfer Process  

作　　者：Qiao-li LIN Gao-jun MAO Qian HUANG Rui CAO Jian-hong CHEN 

机构地区：[1]State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal,Lanzhou University of Technology

出　　处：《Journal of Iron and Steel Research International》2016年第6期566-572,共7页

基　　金：Item Sponsored by National Natural Science Foundation of China(51301083,51265028);Provincial Fund for Distinguished Young Scientists of Gansu of China(1506RJDA087)

摘　　要：The wetting of galvanized steel by molten Al alloys was studied in the cold metal transfer process by the sessile drop method using a high speed video camera.The wetting behavior can be divided into two typical cases,trending of non-wetting by using small wire feeding speed and wetting by using large wire feeding speed.The Leidenfrost effect is caused by the volatilization of Zn,which is responsible for the former case.The enhanced wettability of steel by Al and the weakening of the Leidenfrost effect are responsible for the latter case.Zn is the destabilizing factor for Al-steel joining that needs to be avoided by a reasonable design of process.The wetting of galvanized steel by molten Al alloys was studied in the cold metal transfer process by the sessile drop method using a high speed video camera.The wetting behavior can be divided into two typical cases,trending of non-wetting by using small wire feeding speed and wetting by using large wire feeding speed.The Leidenfrost effect is caused by the volatilization of Zn,which is responsible for the former case.The enhanced wettability of steel by Al and the weakening of the Leidenfrost effect are responsible for the latter case.Zn is the destabilizing factor for Al-steel joining that needs to be avoided by a reasonable design of process.

关 键 词：wetting camera evaporation latter weakening trending feeding boiling joining metallic 

分 类 号：TG174.4[金属学及工艺—金属表面处理]