Improvement on Quality of Rolled Billet of EAF-LF-VD-CC Steelmaking High-Speed Railway Axle Steel DZ2 by Argon Shielding ESR

张锦文; 王文先; 邬中华; 赵志刚; 王松伟; 王之香; 王玉玲

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Improvement on Quality of Rolled Billet of EAF-LF-VD-CC Steelmaking High-Speed Railway Axle Steel DZ2 by Argon Shielding ESR

更新时间：2026-01-21

- Improvement on Quality of Rolled Billet of EAF-LF-VD-CC Steelmaking High-Speed Railway Axle Steel DZ2 by Argon Shielding ESR
- Special Steel Vol. 42, Issue 4, Pages: 25-29(2021)
- 作者机构：
  
  1. 太原理工大学材料科学与工程学院,太原,030024
  2. 山西太钢不锈钢股份有限公司技术中心,太原,030003
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：10 December 2020，
  
  Online First：09 March 2022，
  
  Published：09 March 2021
- 稿件说明：
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张锦文, 王文先, 邬中华, et al. Improvement on Quality of Rolled Billet of EAF-LF-VD-CC Steelmaking High-Speed Railway Axle Steel DZ2 by Argon Shielding ESR[J]. Special Steel, 2021, 42(4): 25-29.
DOI：

张锦文, 王文先, 邬中华, et al. Improvement on Quality of Rolled Billet of EAF-LF-VD-CC Steelmaking High-Speed Railway Axle Steel DZ2 by Argon Shielding ESR[J]. Special Steel, 2021, 42(4): 25-29. DOI：

摘要

采用EAF-LF-VD-Φ690 mm铸坯和EAF-LF-VD-Φ690 mm铸坯-Φ740 mm ESR锭两种工艺分别制备了250 mm × 250 mm高铁车轴用DZ2钢轧坯

并研究了其低倍组织、夹杂物、碳偏析、金相组织和力学性能。结果表明:相比于电弧炉流程工艺

电渣重熔工艺得到的DZ2钢轴坯中心疏松和一般疏松从0.5～1.0级降低到0～0.5级

夹杂物尺寸从2.43～25.05 μm降低到1.42～9.32 μm

夹杂物形貌由棒状变为球形;横截面上碳含量分布从0.256%～0.269%降低到0.261%～0.265%

碳极差从0.013%降低到0.004%;屈服强度和抗拉强度分别提高了17.5%和13.8%

20℃横向和纵向冲击功分别提高36.2%和17.8%。

Abstract

The 250 mm x 250 mm rolled billets of high-speed railway axle steel DZ2 are rolled

by EAF-LF-VD-ϕ690 mm cast bloom and EAF-LF-VD-ϕ690 mm cast bloom-ϕ740 mm ESR ingot of two processes. The macrostructure

inclusions

carbon segregation

microstructure and mechanical properties of the blooms are studied. The results show that: compared with EAF process flowsheet

the rating of central porosity and general porosity of DZ2 steel shaft billet obtained by ESR process reduces from 0.5 ~ 1.0 to 0 ~ 0.5 grade； the size range of inclusions reduces from 2.43 ~ 25. 05μm to 1. 42 ~ 9. 32μm

and the morphology of inclusion changes from rod-shaped to spherical； the carbon content distribution on cross-section reduces from 0.256% ~ 0.269% to 0.261 % ~ 0.265%

and the carbon range difference reduces from 0.013% to 0.004% ; the yield strength and tensile strength increase by 17.5% and 13.8%

respectively

and the transverse and longitudinal impact energy at 20℃. increase by 36.2% and 17.8%

respectively.

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