黄玮,欧梅桂,梁益龙,马永涛

• 1:贵州大学材料与冶金学院
• 2:贵州省材料结构与强度重点实验室
• 3:中车贵阳车辆有限公司

摘要(Abstract)：

采用油、HX-2000以及不同浓度PAG对51CrV4钢进行淬火冷却，借助光学显微镜、扫描电镜(SEM)、电子背散射衍射(EBSD)技术、拉伸实验和洛氏硬度计等研究了不同淬火冷速对51CrV4钢显微组织和力学性能的影响。结果表明：提高淬火冷速对马氏体板条有明显细化效果，51CrV4钢的强塑积随着淬火冷速的提高呈先增后减的趋势。当使用13%PAG淬火及400℃回火保温100 min后，51CrV4钢的综合力学性能最佳：屈服强度和抗拉强度分别为1317.26和1560.89 MPa,断后伸长率和断面收缩率分别为10.50%和55.38%,硬度为47.4 HRC,强塑积达到16.39 GPa%。

关键词(KeyWords)： 51CrV4钢;淬火冷速;显微组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 贵州省科学技术项目(黔科合成果[2022]一般031;黔科合支撑[2023]一般267)

作者(Author): 黄玮,欧梅桂,梁益龙,马永涛

DOI: 10.13289/j.issn.1009-6264.2023-0411

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