摘要
对汽车发动机缸体内壁进行了等离子喷涂和火焰重熔处理,研究了Ni60、Ni60+12%WC和Ni60+12%WC+6%Mo合金粉末涂层的微观组织,对比分析了3种涂层的孔隙率和耐磨性。结果表明,等离子喷涂涂层与基体之间主要以机械结合为主,而火焰重熔处理后的涂层与基体实现了良好的冶金结合。重熔后涂层的孔隙率明显降低,而耐磨性显著提高。无论是喷涂涂层还是重熔涂层,磨损量从大至小的顺序均为:Ni60>Ni60+12%WC>Ni60+12%WC+6%Mo。
The microstructure of Ni60, Ni60+12%WC and Ni60+12%WC+6%Mo alloy powder coating on cylinder block of automobile engine were studied by plasma spraying and flame remelting processing. And the porosity and wear resistance of the three kinds of the coatings were analyzed. The results show that the main combination style of the plasma spraying coating and the substrate is mechanical combination, and the combination style the coating and the substrate is metallurgical bonding after flame remelting. The porosity of remelting coating is greatly reduced than that of plasma spraying coating, and the wear resistance is significantly improved. The wear volume of both sprayed coatings and remelted coating from big to small is as follow: Ni60>Ni60+12% WC>Ni60+12% WC+6% Mo.
出处
《铸造技术》
CAS
北大核心
2016年第8期1632-1635,1649,共5页
Foundry Technology
基金
湖南省教育厅科研课题(15C0507)
关键词
合金粉末
喷涂
重熔
耐磨性
alloy powder
spraying
remelting
wear resistance
