金属热处理 ›› 2024, Vol. 49 ›› Issue (2): 220-223.DOI: 10.13251/j.issn.0254-6051.2024.02.035

• 工艺研究 • 上一篇    下一篇

热处理对高压气瓶封头显微组织和力学性能的影响

魏巍1, 罗雄1, 范俊明2, 陈刘斌2, 吴明霞3   

  1. 1.成都市特种设备检验检测研究院, 四川 成都 610299;
    2.成都格瑞特高压容器有限责任公司, 四川 成都 610400;
    3.四川大学 机械工程学院, 四川 成都 610065
  • 收稿日期:2023-09-11 修回日期:2024-01-05 出版日期:2024-03-27 发布日期:2024-03-27
  • 通讯作者: 吴明霞,副教授,博士,E-mail:wumingxia@scu.edu.cn
  • 作者简介:魏 巍(1982—),男,高级工程师,硕士,主要研究方向为承压类特种设备检验检测,E-mail:18708185844@163.com。

Effect of heat treatment on microstructure and mechanical properties of high-pressure gas cylinder head

Wei Wei1, Luo Xiong1, Fan Junming2, Chen Liubin2, Wu Mingxia3   

  1. 1. Chengdu Special Equipment Inspection and Testing Institute, Chengdu Sichuan 610299, China;
    2. Chengdu Great High Pressure Vessel Co., Ltd., Chengdu Sichuan 610400, China;
    3. School of Mechanical Engineering, Sichuan University, Chengdu Sichuan 610065, China
  • Received:2023-09-11 Revised:2024-01-05 Online:2024-03-27 Published:2024-03-27

摘要: 对34CrMo4无缝钢管翻板旋压成形的高压气瓶进行了淬火+亚温淬火+回火的热处理,然后采用金相观察以及拉伸试验等方法对比研究了热处理前后气瓶封头的显微组织和力学性能。研究发现,热处理可使材料的晶粒明显细化,并使气瓶封头部位较为粗大的铁素体+索氏体组织转变为细小的回火索氏体组织;热处理后气瓶封头位置的抗拉强度和屈服强度均有所提高,屈强比降低,且气瓶的塑性有所提升。结果表明,淬火+亚温淬火+回火的热处理工艺有利于优化34CrMo4钢高压气瓶的显微组织并提升其力学性能。

关键词: 34CrMo4钢, 高压气瓶, 热处理, 显微组织, 力学性能

Abstract: High pressure gas cylinder made of 34CrMo4 seamless steel tube prepared by flip plate spinning forming was treated by quenching+subcritical quenching+tempering, and then microstructure and mechanical properties of the cylinder head before and after heat treatment were studied by metallographic observation and tensile test. The results show that the grain size of the material is obviously refined by the heat treatment, and the coarse ferrite+sorbite structure in the cylinder head is transformed into fine tempered sorbite structure. After heat treatment, the tensile strength and yield strength of the cylinder head are improved, the yield ratio is reduced, and the plasticity of the cylinder is improved. It is proved that the heat treatment process of quenching+subcritical quenching+tempering is beneficial to optimize the microstructure and improve the mechanical properties of high-pressure gas cylinder made of 34CrMo4 steel.

Key words: 34CrMo4 steel, high-pressure gas cylinder, heat treatment, microstructure, mechanical properties

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