金属热处理 ›› 2025, Vol. 50 ›› Issue (12): 10-15.DOI: 10.13251/j.issn.0254-6051.2025.12.002

• 组织与性能 • 上一篇    下一篇

高速铁路扣件用弹条原奥氏体晶粒度的测定及对疲劳性能的影响

张晨旭1, 王亚洲1,2, 张远庆1,2, 刘瑞德1, 汝继来1,2,3   

  1. 1.北京铁科首钢轨道技术股份有限公司, 北京 102206;
    2.中国铁道科学研究院集团有限公司 铁道建筑研究所, 北京 100081;
    3.高速铁路轨道系统全国重点实验室, 北京 100081
  • 收稿日期:2025-07-07 修回日期:2025-10-13 发布日期:2026-01-06
  • 通讯作者: 王亚洲,副研究员,博士,E-mail: yazhou_wang@163.com
  • 作者简介:张晨旭(1995—),女,工程师,硕士,主要研究方向为扣件制造工艺技术,E-mail: zcx1234561204@163.com。
  • 基金资助:
    中国铁道科学研究院集团有限公司科研项目(2023YJ047)

Evaluation of prior austenite grain size in high-speed railway fastening clips and its effect on fatigue property

Zhang Chenxu1, Wang Yazhou1,2, Zhang Yuanqing1,2, Liu Ruide1, Ru Jilai1,2,3   

  1. 1. Beijing Tieke Shougang Railway-Tech Co., Ltd., Beijing 102206, China;
    2. Railway Engineering Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing 100081, China;
    3. State Key Laboratory for Track System of High-speed Railway, Beijing 100081, China
  • Received:2025-07-07 Revised:2025-10-13 Published:2026-01-06

摘要: 采用母相晶粒取向重构方法,测量了60Si2Mn弹簧钢原料及弹条成品原奥氏体晶粒度,并分析了不同热处理工艺对弹条奥氏体晶粒及其疲劳性能的影响。结果表明,EBSD与母相重构相结合的方法能够获得更加清晰的晶粒图像。相比于传统的弹条检验方法,该技术可以有效识别热成形工艺不当引起的晶粒异常长大问题,从而提升产品检测精度,增强高速铁路轨道的整体安全性。

关键词: 弹条, 弹簧钢, 奥氏体晶粒度, 母相重构, 疲劳性能

Abstract: Parent grain reconstruction method was employed to measure the prior austenite grain size of 60Si2Mn spring steel and fastening clips, and the effects of heat treatment parameters on prior austenite grains and the fatigue property of the 60Si2Mn spring steel and its clips were also investigated. The results show that the EBSD and parent grain reconstruction methods reveal a clear grain image. Compared with traditional inspection techniques for fastening clips, this approach effectively identifies abnormal grain growth caused by improper thermoforming processes, thereby improving product detection accuracy and enhancing the overall safety of high-speed railway tracks.

Key words: railway clips, spring steel, austenite grain size, parent grain reconstruction, fatigue property

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