Effect of Silicon on Microstructure and Mechanical Properties of Nb-V Microalloyed Si-Mn-Cr-Mo Series Bainite Rail Steel

任艳茹; 李晓晖; 赵卫东

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Effect of Silicon on Microstructure and Mechanical Properties of Nb-V Microalloyed Si-Mn-Cr-Mo Series Bainite Rail Steel

更新时间：2026-01-21

- Effect of Silicon on Microstructure and Mechanical Properties of Nb-V Microalloyed Si-Mn-Cr-Mo Series Bainite Rail Steel
- Special Steel Vol. 42, Issue 1, Pages: 47-49(2021)
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- Online First：07 April 2022，
  
  Published：07 April 2021
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任艳茹, 李晓晖, 赵卫东. Effect of Silicon on Microstructure and Mechanical Properties of Nb-V Microalloyed Si-Mn-Cr-Mo Series Bainite Rail Steel[J]. Special Steel, 2021, 42(1): 47-49.
DOI：

任艳茹, 李晓晖, 赵卫东. Effect of Silicon on Microstructure and Mechanical Properties of Nb-V Microalloyed Si-Mn-Cr-Mo Series Bainite Rail Steel[J]. Special Steel, 2021, 42(1): 47-49. DOI：

摘要

研究了1250 MPa级Nb-V微合金化Si-Mn-Cr-Mo系贝氏体轨钢(/%:0.25 C

0.38-1.56 Si

1.69～1.76 Mn

1.34～1.37 Cr

0.32～0.33 Mo

0.034～0.036 Nb

0.11～0.12 V)硅含量对试验钢显微组织和力学性能的影响。试验结果表明:试验钢热轧后空冷

随着硅含量的增加

试验钢的铁素体+珠光体相变被抑制

室温组织中贝氏体、马氏体含量增加

影响钢的强度和硬度

硅含量由0.38%提高到1.56%时

试验钢的屈服强度由846 MPa增至903 MPa

抗拉强度由1 280 MPa增至1 355 MPa

HBW硬度值由353增至411。

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