新型铸造热锻模具钢强韧性本质的探讨  

Study on the Nature of Strength and Toughness of a New Cast Hot-Working Die Steel

作　　者：方建儒[1] 姜启川[1] 王树奇[1] 张瑞卿 

机构地区：[1]吉林大学材料科学与工程学院,长春130025 [2]一汽集团公司铸造公司,长春130061

出　　处：《金属热处理》2001年第11期8-10,共3页Heat Treatment of Metals

基　　金：国家计委产业化前期关键技术与成套设备研制开发项目([1 999] 31 7)

摘　　要：采用微观分析方法探讨了新型铸造热锻模具钢 (CHD钢 )的强韧化机理。研究表明 ,CHD钢具有较高的强韧性和高温稳定性 ,其组织为具有高密度位错的板条马氏体和贝氏体的复合组织 ,板条界连续分布着许多薄膜状残留奥氏体。CHD钢在回火过程中弥散析出细小的碳化物V3C4 、Mo2 C。The nature of strength and toughness of a new cast hot working die steel (CHD steel) has been studied through the micro analysis in this paper.Results show that CHD steel has good strength and toughness and high temperature stableness.The microstructures are combined with lath martensite with high density dislocations,bainite and retained austenite films which distributed at the lath boundaries continuously.The fine carbides such as V 3C 4 and Mo 2C were precipitated dispersedly during tempering.The combination of these substructures is the nature of high strength and toughness of CHD steel.

关 键 词：CHD钢 强韧性 残留奥氏体 碳化物 铸造热锻模钢 

分 类 号：TG161[金属学及工艺—热处理] TG142.45[金属学及工艺—金属学]