江浩,吴晓春

• 1:上海大学材料科学与工程学院

摘要(Abstract)：

对一种新型含氮奥氏体模具钢在不同工艺下进行热处理,并对试验钢的强韧性与热稳定性进行测试。利用DIL805A热膨胀相变仪测定膨胀系数,通过光学显微镜、高分辨扫描电子显微镜、X射线衍射仪及高分辨透射电子显微镜观察分析显微组织。结果表明:试验钢的最佳热处理工艺为1200℃固溶+720℃时效保温2 h,硬度达46 HRC,横向无缺口冲击试样冲击功达150 J;热稳定性良好,700℃保温20 h,硬度基本不变,780℃保温20 h后,硬度在44 HRC以上;钢中析出相主要为V(C、N),时效状态下析出相占钢中总量约4%,弥散析出强化相尺寸为10～20 nm。

关键词(KeyWords)： 含氮奥氏体钢;热稳定性;析出相

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(S30107)

作者(Author): 江浩,吴晓春

DOI: 10.13289/j.issn.1009-6264.2011.03.015

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