有机物切割刀具用钢9CrV的低温二次硬化技术及原理  

Technology and Principle of Low Temperature Secondary Hardening for Organic Matter Cutting Tool Steel

作　　者：陈明昕[1,2] 雍岐龙[1,2] 刘振宝[1] 亓海全[1,2] 雍兮[1,3] 

机构地区：[1]钢铁研究总院,北京100081 [2]昆明理工大学材料与冶金工程学院,云南昆明650093 [3]中国科学院计算技术研究所,北京100190

出　　处：《钢铁》2009年第10期71-74,91,共5页Iron and Steel

基　　金：国家自然科学基金资助项目(50441032)

摘　　要：深入分析了有机物切割刀具用钢9CrV通过低温二次硬化实现超硬化的技术原理,采用特殊热处理工艺,在低温回火时直接析出大量微细的合金渗碳体,通过高碳马氏体强化叠加微细弥散合金渗碳体的沉淀强化可显著提高钢的硬度实现超硬化,合金渗碳体的尺寸细化到50 nm左右,由此使钢的热处理硬度达到HRC 68～72。The technical principle of reaching ultra-hardness by secondary hardening at low temperature for organic matter cutting tool steel 9CrV has been studied in detail. Special heat treatment was used to precipitate numerous and fine alloy cementites directly in low temperature tempering, and then realize ultra-hardness via high-carbon matensitie hardening and precipitation strengthening of fine dispersed alloy cementites, the size of the cementites is refined to about 50 nm and the hardness of the cutting tool steel reaches HRC 68-72.

关 键 词：9CrV 刀具钢 低温二次硬化 超硬化 合金渗碳体 

分 类 号：TG142.4[一般工业技术—材料科学与工程]