Laser Surface Alloying of Low Carbon Steel Using High-entropy Alloy Precursors  

作　　者：Xiao-tao LIU Wen-bin LEI Qun-jiao WANG Wei-ping TONG Chang-sheng LIU Jian-zhong CUI 

机构地区：[1]Key Laboratory of Electromagnetic Processing of Materials of Ministry of Education,Northeastern University [2]School of Materials Science and Engineering,Northeastern University

出　　处：《Journal of Iron and Steel Research International》2016年第11期1195-1199,共5页

基　　金：Item Sponsored by National Natural Science Foundation of China(50401006);Fundamental Research Funds for Central Universities of China(N120409003)

摘　　要：The Al0. 5CoCrCuFeNi high-entropy alloy powders with simple face-centered-cubic （FCC） solid solution structure were introduced into the surface layer of a low carbon steel during laser surface alloying. A high performance surface layer with extremely fine martensite as the dominant phase was obtained, resulting in a great improvement in microhardness, wear resistance, and corrosion resistance. The great enhancement of microhardness and wear resistance of the laser alloyed layer is mainly due to the formation of extremely fine martensite hard phase, the solid solution strengthening of the alloying e!.ements in supersaturated a-Fe solid solution, and the existence of size effect and strain effect under rapid solidification. The enhancement of corrosion resistance is due to the alloying of Al, Co, Ni, Cr and Cu in the laser alloyed layer.The Al0. 5CoCrCuFeNi high-entropy alloy powders with simple face-centered-cubic （FCC） solid solution structure were introduced into the surface layer of a low carbon steel during laser surface alloying. A high performance surface layer with extremely fine martensite as the dominant phase was obtained, resulting in a great improvement in microhardness, wear resistance, and corrosion resistance. The great enhancement of microhardness and wear resistance of the laser alloyed layer is mainly due to the formation of extremely fine martensite hard phase, the solid solution strengthening of the alloying e!.ements in supersaturated a-Fe solid solution, and the existence of size effect and strain effect under rapid solidification. The enhancement of corrosion resistance is due to the alloying of Al, Co, Ni, Cr and Cu in the laser alloyed layer.

关 键 词：laser surface alloying high-entropy alloy HARDNESS WEAR CORROSION 

分 类 号：TG174.445[金属学及工艺—金属表面处理]