Fabrication of in-situ synthesized ceramic reinforced Ni-based alloy composite coatings by reactive braze coating processing  

作　　者：Pei Xinjun Liu Wenbin Cheng ge Pan Xinyu Li Aina Li haishen 裴新军;刘文彬;程铬;潘新宇;李爱娜;李海深(Yangjiang Polytechnic,Yangjiang 529566,China)

机构地区：[1]Yangjiang Polytechnic,Yangjiang 529566,China

出　　处：《China Welding》2019年第4期56-62,共7页中国焊接（英文版）

基　　金：supported by Yangjiang science and technology project (0202010067);Yangjiang polytechnic for providing financial assistance.

摘　　要：In-situ synthesized ceramic such as TiC,Cr7C3 and Cr5B3 reinforced Ni-based alloy composite coating was fabricated on the surface of mild steel substrate by reactive braze coating processing with colloidal graphite,Cr,Ni,ferro-boron,Si and titanium powders as the raw materials at low temperature of 1000℃,and a new kind of coating materials was developed.By means of SEM,EDS,XRD and surface hardness tester,the microstructures,phases,hardness and wear-resistance of the coating were analyzed,respectively.The results revealed that the coating was mainly composed of the ceramic in-situ synthesized reinforcement phases of TiC,Cr7C3 and Cr5B3 and the binder phases in-situ synthesized of Ni31Si12 and(Ni,Fe)solid solution;The ceramic reinforcement phases of TiC,Cr7C3 and Cr5B3 were randomly distributed in the binder phases of Ni31Si12 and(Ni,Fe)solid solution;The coating had about 15vol%pores and can possibly be applied as a self-lubrication coating;The coating and the substrate were integrated together by metallurgical bonding;The coating had a hardness up to 91-94HR15N.

关 键 词：reactive braze coating processing composite coating Ni-based alloy CERAMIC self-lubrication coating 

分 类 号：TG174.4[金属学及工艺—金属表面处理]