王艳辉,李雪峰,刘柏松,徐东,姚菲,曾洪涛,赵雷杰,武东东,李丽

• 1:河北工程大学河北省智能工业装备技术重点实验室
• 2:河北工程大学河北省高品质冷镦钢技术创新中心
• 3:河北太行钢铁集团有限公司河北省高校高端紧固件全流程应用技术研发中心
• 4:邯郸钢铁集团有限责任公司

摘要(Abstract)：

在传统轴承钢GCr15的基础上，添加合金元素Si、Mo以及微合金元素V得到一种新型微合金化轴承钢，并优化传统马氏体轴承钢的热处理工艺，将新型微合金化轴承钢在M_s(马氏体开始形成的温度)点以下进行等温处理，得到等温马氏体组织。采用扫描电镜(SEM)、X射线衍射(XRD)、洛氏硬度计、冲击实验和拉伸实验等研究了不同热处理工艺对微合金化等温马氏体轴承钢微观组织和力学性能的影响。结果表明：实验钢在M_s以下等温后组织主要由马氏体(M)、残留奥氏体(RA)以及未溶碳化物组成，当等温时间延长至60 min时，组织中出现了少量针状贝氏体。经不同工艺热处理后实验钢的硬度均在61 HRC以上。实验钢在170℃等温淬火后，冲击韧性相对较高，原因是组织中有较多的残留奥氏体，但较高的残留奥氏体含量降低了其抗拉强度。在170℃等温淬火15 min后，实验钢的综合性能较好，其硬度、冲击韧性和抗拉强度分别为62.4 HRC、52 J/cm~2和2139 MPa。

关键词(KeyWords)： 轴承钢;微合金化;等温马氏体;微观组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52001105,U20A20272);; 河北省自然科学基金资助(E2022402107,E2020402101);; 河北省高等学校科学技术研究项目资助(BJ2021012,CXY2023004)

作者(Author): 王艳辉,李雪峰,刘柏松,徐东,姚菲,曾洪涛,赵雷杰,武东东,李丽

DOI: 10.13289/j.issn.1009-6264.2023-0141

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