Microstructure and properties of induction brazing nickel base/WC composite coating  

作　　者：秦建 杨骄 刘攀 刘大双 卢洪波 廖清泉 常云峰 Qin Jian;Yang Jiao;Liu Pan;Liu Dashuang;Lu Hongbo;Liao Qingquan;Chang Yunfeng(Zhengzhou Dingsheng High-tech Energy Engineering Technology Co.,LTD.,Zhengzhou 450001,China;School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China;State Key Laboratory of Brazing Materials and Technology,Zhengzhou Machinery Research Institute Co.,LTD.,Henan,Zhengzhou 450001,China)

机构地区：[1]Zhengzhou Dingsheng High-tech Energy Engineering Technology Co.,LTD.,Zhengzhou 450001,China [2]School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China [3]State Key Laboratory of Brazing Materials and Technology,Zhengzhou Machinery Research Institute Co.,LTD.,Henan,Zhengzhou 450001,China

出　　处：《China Welding》2023年第1期27-34,共8页中国焊接（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.U2004186).

摘　　要：BNi-2/WC composite wear-resisting coating was prepared on carbon steel by the method of induction brazing.The microstructure and phase composition of the composite coating were analyzed,and the bonding strength and wear-resisting performance of the coating were tested.During the process of induction brazing,the tungsten carbide partially dissolves and reacts with the filler metal alloy to form NiW compound phase,which realizes the metallurgical combination of tungsten carbide and filler metal alloy.The matrix of the filler metal alloy consists of Ni solid solution and Ni_(3)B/Ni_(3)Si eutectic phase,and the metallurgical diffusion reaction occurs between the filler metal alloy and the steel matrix.The mechanical analysis results show that the self-strength of the composite coating reaches 140 MPa and the bonding strength of the filler metal alloy to the steel matrix reaches 360 MPa.The dry sand rubber wheel wear testing machine showed that the coating weight loss was only 0.2824 g,which was only 1/5 of the weight loss of 65 Mn matrix under the same conditions.

关 键 词：composite coating induction brazing tungsten carbide BNI-2 wear resistance 

分 类 号：TG454[金属学及工艺—焊接] TG174.4