渗氮处理对金属陶瓷耐蚀性的影响  

Influence of Nitriding Treatment on Corrosion Resistance of Cermet

作　　者：孙亚丽[1,2,3] 黄新[1] 刘清才[3] 杨剑[3] 唐楷[1] 

机构地区：[1]四川理工学院材料与化学工程学院,四川自贡643000 [2]四川理工学院材料腐蚀与防护四川省高校重点实验室,四川自贡643000 [3]重庆大学材料科学与工程学院,重庆400030

出　　处：《稀有金属与硬质合金》2011年第3期58-61,74,共5页Rare Metals and Cemented Carbides

基　　金：四川省科技厅科技支撑计划(2009GZ0025);四川理工学院材料防腐与防护四川高校重点实验室开放基金资助项目(2008CL09)

摘　　要：针对金属陶瓷耐腐蚀性不足的特点,采用真空烧结后渗氮的方法制备出表层富氮的金属陶瓷,并分析试样的微观结构,测试其力学和物理性能、耐腐蚀性能。结果表明,与常规金属陶瓷对比,渗氮后金属陶瓷的综合性能提高,且在酸、碱介质中的耐腐蚀性有所提高;渗氮后试样表面Ti含量提高,硬度提高,有利于改善金属陶瓷的机械性能和耐腐蚀性。In view of poor corrosion resistance of ordinary cermet,the cermet with rich N on its surface was prepared by first vacuum sintering and then nitriding. The microstructure,mechanical and physical properties,and corrosion resistance of the prepared sample were analyzed. The results show that the comprehen sive performance of cermet is improved by nitriding,and its corrosion resistance in acidic or basic medium also improved. After cermet is treated with nitriding, both its surface Ti content and hardness increase to improve the mechanical properties and corrosion resistance.

关 键 词：渗氮 金属陶瓷 力学性能 密度 耐蚀性 

分 类 号：TF125.31[冶金工程—粉末冶金]