金属热处理 ›› 2021, Vol. 46 ›› Issue (8): 70-72.DOI: 10.13251/j.issn.0254-6051.2021.08.014

• 组织与性能 • 上一篇    下一篇

城际及高铁轨道用辙叉贝氏体钢的组织与性能

李缘, 栾道成, 胡志华, 邓天鑫, 任阳, 左城铭, 王正云   

  1. 西华大学 材料科学与工程学院, 四川 成都 610039
  • 收稿日期:2021-03-30 出版日期:2021-08-25 发布日期:2021-12-09
  • 通讯作者: 王正云,高级实验师,博士,E-mail:wzy-513@163.com
  • 作者简介:李 缘(1995—),男,硕士研究生,主要研究方向为贝氏体钢的组织性能,E-mail:13407143526@163.com。
  • 基金资助:
    四川省科技支撑项目(2018GZ0053);四川省科技创新苗子工程项目(2019133);西华大学重点科研基金(YCJJ2020033);西华大学创新基金(YCJJ2020105)

Microstructure and properties of bainitic steel for frog used in intercity and high-speed railway track

Li Yuan, Luan Daocheng, Hu Zhihua, Deng Tianxin, Ren Yang, Zuo Chengming, Wang Zhengyun   

  1. College of Materials Science and Engineering, Xihua University, Chengdu Sichuan 610039, China
  • Received:2021-03-30 Online:2021-08-25 Published:2021-12-09

摘要: 采用光学显微镜、扫描电镜、X射线衍射仪、冲击试验机以及万能试验机研究了城际及高铁轨道辙叉用贝氏体钢的组织与力学性能。结果表明,试验钢在空冷条件下即可得到贝氏体组织,经XRD分析其组织为无碳化物贝氏体。试验钢的抗拉强度达到1410 MPa,室温冲击吸收能量高达89 J,硬度较高且具有较好的强韧性配比。低温冲击试验结果表明,试验钢可以满足低温环境下城际及高铁轨道辙叉的使用要求。

关键词: 城际及高铁轨道辙叉, 贝氏体钢, 显微组织, 硬度, 强韧性

Abstract: Microstructure and mechanical properties of bainitic steel for intercity and high-speed railway frog were studied by means of optical microscope, scanning electron microscope, XRD, impact tester and universal tester. The results show that the bainite structure of the tested steel can be obtained under air cooling condition, and the structure is carbide free bainite determined by XRD analysis. The tensile strength of the tested steel is 1410 MPa, and the impact absorbed energy at room temperature is up to 89 J. The steel has a higher hardness, and good match of strength and toughness. The low-temperature impact test results show that the tested steel can meet the application requirements of the frog for intercity and high-speed railway track under low-temperature environment.

Key words: frog used in intercity and high-speed railway track, bainitic steel, microstructure, hardness, strength and toughness

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