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Fabrication of in-situ synthesized ceramic reinforced Ni-based alloy composite coatings by reactive braze coating processing
裴新军, 刘文彬, 程铬, 潘新宇, 李爱娜, 李海深
作者单位
裴新军, 刘文彬, 程铬, 潘新宇, 李爱娜, 李海深 Yangjiang Polytechnic, Yangjiang 529566, China 
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 1 000 ℃, 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
DOI:10.12073/j.cw.20190911001
分类号:
基金项目:
Fabrication of in-situ synthesized ceramic reinforced Ni-based alloy composite coatings by reactive braze coating processing
Xinjun Pei, Wenbin Liu, ge Cheng, Xinyu Pan, Aina Li, haishen Li
Yangjiang Polytechnic, Yangjiang 529566, China
Abstract:
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 1 000 ℃, 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.
Key words:  reactive braze coating processing|composite coating|Ni-based alloy|ceramic|self-lubrication coating