金属热处理 ›› 2021, Vol. 46 ›› Issue (1): 204-208.DOI: 10.13251/j.issn.0254-6051.2021.01.037

• 组织与性能 • 上一篇    下一篇

高铁刹车盘用CrMoV钢的高温热塑性

王程明, 安治国, 孙晓冉, 孙岩, 海岩   

  1. 河钢集团钢研总院,河北 石家庄 050031
  • 收稿日期:2020-06-26 出版日期:2021-01-25 发布日期:2021-01-26
  • 通讯作者: 安治国,高级工程师,博士,E-mail:18830660128@163.com
  • 作者简介:王程明(1990—),女,硕士,主要研究方向为材料组织与性能,E-mail:15230158871@163.com。

Hot ductility of brake disc CrMoV steel for high speed railway

Wang Chengming, An Zhiguo, Sun Xiaoran, Sun Yan, Hai Yan   

  1. HBIS Group Technology Research Institute,Shijiazhuang Hebei 050031,China
  • Received:2020-06-26 Online:2021-01-25 Published:2021-01-26

摘要: 采用Gleeble-3800热模拟试验机研究了600~1350 ℃范围内高铁刹车盘用CrMoV钢的高温热塑性,利用扫描电镜观察断口形貌,利用光学显微镜观察断口截面显微组织。结果表明:试验钢在600~1350 ℃范围内存在3个脆性温度区间,即熔点~1320 ℃的第Ⅰ脆性区、1100~1000 ℃区间的第Ⅱ脆性区和800~650 ℃区间的第Ⅲ脆性区,晶界V(C,N)和VN的析出是造成第Ⅱ脆性区塑性恶化的主要原因,在制定轧制工艺时应避开这些区域。

关键词: 刹车盘, 高温热塑性, 断口形貌, 脆性区

Abstract: Hot ductility tests of brake disc CrMoV steel for high speed railway were carried out at temperatures between 600-1350 ℃ by a Gleeble-3800 thermal simulator,the fracture morphology was observed by means of scanning electron microscopy and the microstructure section fracture was observed by optical microscope.The results show that there are three brittle temperature zones for the experimental steel in the range of 600-1350 ℃,Ⅰ brittle zone is from melting point to 1320 ℃,Ⅱ brittle zone 1100-1000 ℃ and Ⅲ brittle zone 800-650 ℃.In the Ⅱ brittle zone,precipitates of V(C,N) and VN at grain boundary is the main cause of deterioration in ductility.It is imperative to avoid those zones when drawing up the rolling schedules.

Key words: brake disc, hot ductility, fracture morphology, brittle zone

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