石楠楠,吴晓春,闵娜

• 1:上海大学材料科学与工程学院

摘要(Abstract)：

利用高分辨透射电镜观察、能谱分析等实验方法,结合硬度试验、热稳定实验不同温度下的实验数据,对热作模具钢4Cr2Mo2W2V中的组织成分、碳化物的形态、大小及其演变规律和对材料高温性能的影响进行了研究。结果表明:热稳保温过程中碳化物的演变与马氏体回复过程是耦合出现的,4Cr2Mo2W2V钢在工作温度620～700℃下的热稳定性能优于传统热作模具钢3Cr2W8V,4Cr2Mo2W2V钢在650℃工作温度下的热稳定性与传统热作模具钢3Cr2W8V在620℃条件下相当。基体中的较多的Mn和相对稳定细小的Mo、V系碳化物保证了4Cr2Mo2W2V钢高温时效过程中能保持一定的硬度。

关键词(KeyWords)： 热稳定性;析出;碳化物演变

Abstract:

Keywords:

基金项目(Foundation): 国家“十一五”科技支撑计划课题(2007BAE51B04);; 上海市重点学科建设项目资助(S30107)

作者(Author): 石楠楠,吴晓春,闵娜

DOI: 10.13289/j.issn.1009-6264.2011.11.014

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