摘要
对H1 3钢的CDC处理进行了研究 ,用金相显微镜及扫描电子显微镜分析了渗碳层的组织形貌 ,用X射线衍射分析了碳化物的组成。确定了H1 3钢在 95 0℃CDC处理的最佳碳势为w [C]=1 2 % ;可获得经水淬后的渗层组织为马氏体基体上弥散分布的碳化物 ,主要碳化物是颗粒平均尺寸为 2 5 0nm的Cr7C3,渗层厚度达到 5 5 0 μm ,最高硬度达到 1 2 5 0Hm .与氮化处理的H1 3钢模具做了耐磨性比较 。
The microstructure and composition of CDC layer were studied by OM,SEM and X-ray.The optimal carbon potential (w=1.2%) was determined for the best carburization at 950℃.Under this condition, The CDC layer was composed of dispersive carbides (most of Cr 7C 3) distributed on the martensite matrix. The average diameter of Cr 7C 3 is 250 nm. The CDC layer thickness and hardness are 550 μm and 1250 Hm respectively.steel H13 treated by CDC shows better wear resistance than that treated by surface nitridization.
出处
《材料与冶金学报》
CAS
2002年第4期311-316,共6页
Journal of Materials and Metallurgy
基金
辽宁省科学技术基金资助项目 (No 980 130 0 30 1)
关键词
H13钢
CDC处理
碳势
硬度
耐磨性
steel H13
CDC
carbon potential
hardness
wear characteristic
