摘要
Abstract
The different coating on the surface AZ91 alloy for automobile engine were prepared with plasma spraying and laser remelting process,and the cross-section morphology,phase composition,microhardness and electrochemical performance were investigated.The results show that the plasma spray coating phases are compose of gamma Ni,FeNi3,Ni~,WC,W2C and Cr7B3,and the laser remelting layer phases are gamma Ni,CrB,Ni4B3,WC,Cr23B6 and Cr2B3.The Microhardness from high to low in turn is the laser remelting layer,plasma spraying layer,Ni/A1 transition layer and AZ91 alloy.Plasma spraying and laser remelting layer corrosion resistance are higher than the AZ91 alloy,and the corrosion resistance of laser remelting layer above the plasma spray coating.关键词
汽车发动机/AZ91合金/表面喷涂/涂层/性能Key words
automobile engine/AZ91 alloy/surface spraying/coating/performance分类
矿业与冶金
