董丽丽,周健,迟宏宵,郭春成,朱留平,杨银辉

• 1:昆明理工大学材料科学与工程学院
• 2:钢铁研究总院有限公司特殊钢研究院

摘要(Abstract)：

为获得具有良好强韧性匹配的改进型H13热作模具钢(以下简称0.5Co钢),对其进行了不同温度的淬火及不同温度的回火处理,采用光学显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)和洛氏硬度计等研究了0.5Co钢经不同工艺热处理后的组织和性能。结果表明:随淬火温度升高,0.5Co钢的硬度先升高后降低;当回火温度在400～520℃时,硬度呈现上升趋势,在520～560℃时,硬度缓慢下降,在560～650℃时,硬度急剧下降,抗拉强度在500℃回火时达到峰值1900 MPa,屈服强度在540℃回火时达到峰值1496 MPa;当回火温度超过600℃后,0.5Co钢的硬度及强度与H13钢的硬度及强度相差不大;随着回火温度的升高,两种试验钢的冲击韧性均呈上升趋势,0.5Co钢的冲击韧性在650℃时达到最高值135 J,比H13钢高出44 J;经1020℃淬火保温30 min+2次600℃回火保温2 h的工艺热处理后,0.5Co钢的强韧性匹配较好。

关键词(KeyWords)： 改进型H13热作模具钢;热处理工艺;强韧性匹配;显微组织

Abstract:

Keywords:

基金项目(Foundation): 河北省科技重大专项项目(22281003Z)

作者(Author): 董丽丽,周健,迟宏宵,郭春成,朱留平,杨银辉

DOI: 10.13289/j.issn.1009-6264.2024-0508

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