Development and Application of 980 MPa Corrosion-Resistant Rail Steel U68CuCr

朱敏; 徐光; 张昌强; 吉玉

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Development and Application of 980 MPa Corrosion-Resistant Rail Steel U68CuCr

更新时间：2026-01-21

- Development and Application of 980 MPa Corrosion-Resistant Rail Steel U68CuCr
- Special Steel Vol. 37, Issue 2, Pages: 58-61(2016)
- 作者机构：
  
  1. 武汉科技大学材料与冶金学院,武汉,430081
  2. 武汉钢铁(集团)公司研究院,武汉,430080
  3. 武汉钢铁股份有限公司质检中心,武汉,430083
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：19 October 2015，
  
  Online First：08 August 2022，
  
  Published：08 August 2016
- 稿件说明：
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朱敏, 徐光, 张昌强, et al. Development and Application of 980 MPa Corrosion-Resistant Rail Steel U68CuCr[J]. Special Steel, 2016, 37(2): 58-61.
DOI：

朱敏, 徐光, 张昌强, et al. Development and Application of 980 MPa Corrosion-Resistant Rail Steel U68CuCr[J]. Special Steel, 2016, 37(2): 58-61. DOI：

摘要

通过制定合理成分和铁水脱硫-120 t顶底复吹转炉-吹氩-LF—RH-280 mm×380 mm坯连铸-轧制工艺

开发了980 MPa热轧耐蚀钢轨U68CuCr（/%:0.65~0.75C，0.40~0.80Si，1.00~1.30Mn，≤0.030P，≤0.025S，≤0.50Cu，≤0.50Cr，≤0.05Nb）。试验结果表明

耐蚀钢轨U68CuCr抗拉强度≥1060 MPa

伸长率≥12%

踏面硬度HB值为300~310

珠光体片间距为0.2μm

耐磨性能优于同一强度级别的U75V钢轨。2%NaCl溶液腐蚀试验显示

耐蚀钢轨U68CuCr腐蚀速率为U75V钢轨的57%。在京广线使用3年

通过总重量超过3亿吨

耐蚀钢轨U68CuCr使用性能良好

其各项指标均满足铁路运输要求。

Abstract

The 980 MPa hot rolled corrosion-resistant rail steel U68CuCr (/% ： 0.65-0.75C

0.40-0.80Si

1.00-1.30Mn

≤0.030P

≤0.025P

≤0.50Cu

≤0.50Cr

≤0.05Nb) is developed by defined the chemical composition and the desulphurized metal-120t top and bottom combined blown converter-argon blowing- LF-RH-280 mm x 380 mm bloom casting-rolling process. Test results show that the tensile strength of corrosion-resistant rail steel U68CuCr is ≥1060 MPa with elongation ≥12%

the hardness HB value of rolling face is 300-310

the interlamellar spacing of pearlite is 0.2 μm

and the wear resistance is better than that of U75V rail steel with same strength rating. The results of 2% NaCl corrosion test show that the corrosion rate o£ rail steel U68CuCr is 57% of that of rail steel U75V. The corrosion-resistant steel U68CuCr rail has better serve performance in Beijing-Guangzhou railway line for 3 years with gross transporting load 0.3 billion t

and all properties of steel U68CuCr rail meet the requirement of rail.

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