典型热处理后不同冷作模具钢的残余奥氏体及对冲击韧性和尺寸稳定性的影响  

Residual Austenite of Different Cold Working Die Steels after the Typical Heat Treatment and Its Influence on Impact Toughness and Dimensional Stability

作　　者：吴正环 谷历文[1] 黄历锋 李荣锋 阮锋 邱华兴[1,2] 范其香 王权[2] WU Zhenghuan;GU Liwen;HUANG Lifeng;LI Rongfeng;RUAN Feng;QIU Huaxing;FAN Qixiang;WANG Quan(National Center for Quality Supervision and Inspection of Mold Products,Dongguan 523841,China;College of Mechanical Engineering,Tianjin Vocational and Technical Normal University,Tianjin 300222,China;Centre of Excellence for Advance for Advanced Materials,Dongguan 523808,China;School of Mechanical&Automotive Engineering,South China University of Technology,Guangzhou 510641,China)

机构地区：[1]国家模具产品质量监督检验中心,东莞523841 [2]天津职业技术师范大学机械工程学院,天津300222 [3]广东(东莞)材料基因高等理工研究院,东莞523808 [4]华南理工大学机械与汽车工程学院,广州510641

出　　处：《理化检验（物理分册）》2021年第10期1-5,11,共6页Physical Testing and Chemical Analysis(Part A:Physical Testing)

基　　金：国家教师科研基金十二五规划(CTF120702);天津市科技特派员项目(20YDTPJC00900,20YDTPJC00100)。

摘　　要：以DC53钢、Cr8Mo2SiV钢、Calmax钢等3种典型的冷作模具钢为研究对象,对比了其在典型热处理工艺处理后的残余奥氏体含量与分布、冲击韧性、尺寸稳定性,并总结出了残余奥氏体对后两者的影响规律。结果表明:DC53钢和Cr8Mo2SiV钢的残余奥氏体含量远高于Calmax钢的,400℃低温回火处理会大幅提升残余奥氏体含量;典型热处理后冷作模具钢的冲击韧性与残余奥氏体含量成正比,与回火温度成反比。DC53钢和Cr8Mo2SiV钢的尺寸变化均遵循直线上升的规律,但Calmax钢的的尺寸变化规律不明显。Taking three typical cold working die steels(DC53 steel,Cr8 Mo2 SiV steel,Calmax steel)as research objects,the content and distribution of residual austenite,impact toughness and dimensional stability after typical heat treatment process were compared,and the influence of residual austenite on the latter two was summarized.The results show that both the residual austenite content of DC53 steel and Cr8 Mo2 SiV steel were much higher than that of Calmax steel,and the content of residual austenite can be greatly increased by low temperature tempering at 400℃.The impact toughness of the cold work die steel after typical heat treatment was directly proportional to the content of residual austenite and inversely proportional to the tempering temperature.Both the size changes of DC53 steel and Cr8 Mo2 SiV steel followed the law of linear rising,while the size change of Calmax steel was not obvious.

关 键 词：冷作模具钢 热处理 残余奥氏体 冲击韧性 尺寸稳定性 

分 类 号：TG142.14[一般工业技术—材料科学与工程]