摘要
采用离子氮化+双层辉光离子渗金属的复合处理渗铬新技术,对碳素工具钢进行560℃表面渗镀铬硬化研究。结果表明,渗镀层组织由沉积层+扩散层组成;渗镀层表面形成4～5μm的沉积层,含铬量达50%以上,致密并与基体冶金结合;内有20～25μm的扩散层,扩散层含铬量呈梯度分布;经X射线衍射分析,其表面物相由Fe-Cr、CrN、Cr7C3、Cr23C6等组成;渗镀层的显微硬度达1000 HV以上,硬度向内逐步降低,呈梯度分布。
The chromizing hardening process of carbon tool steel was studied by using double glow plasma surface chromizing process＋ion-nitriding at 560℃. The results show that the microstructure of plating layer consistes of sediment layer and diffusing layer, The depth of sediment layer is 4-5μm and the content of chromium is more than 50%,which combines closely with foundation. The chromium distribution of diffused layer is in gradient and the depth is 20-25μm. The phase composition of alloyed layer consistes of Fe-Cr, CrN, Cr7C3, Cr23C6. The hardness of chromized layer is more than 1 000 HV and distribution of hardness is in gradient, which don＇t change the structure and property of the foundational material.
出处
《热加工工艺》
CSCD
北大核心
2007年第22期57-59,共3页
Hot Working Technology
基金
上海宝钢集团公司资助项目(50374050)
广西研究生创新项目(2006105950805M13)
广西自然科学基金资助项目(桂科自0728207)
关键词
碳素工具钢
离子氮化
渗镀铬
carbon tool steel
ion-nitriding
chromizing
