Effect of RE on Hot Plasticity of V Microalloying Heavy Rail Steel

王晓丽; 宋波; 智建国; 高明星; 陈沅; 安胜利

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Effect of RE on Hot Plasticity of V Microalloying Heavy Rail Steel

更新时间：2026-01-21

- Effect of RE on Hot Plasticity of V Microalloying Heavy Rail Steel
- Special Steel Vol. 33, Issue 5, Pages: 45-46(2012)
- 作者机构：
  
  1. 北京科技大学冶金与生态工程学院,北京,100083
  2. 包头钢铁职业技术学院,包头,014010
  3. 包钢(集团)公司
  4. 技术中心
  5. 技术质量部,包头,014010
  6. 内蒙古科技大学,包头,014010
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：23 March 2012，
  
  Online First：10 October 2022，
  
  Published：10 October 2012
- 稿件说明：
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王晓丽, 宋波, 智建国, et al. Effect of RE on Hot Plasticity of V Microalloying Heavy Rail Steel[J]. Special Steel, 2012, 33(5): 45-46.
DOI：

王晓丽, 宋波, 智建国, et al. Effect of RE on Hot Plasticity of V Microalloying Heavy Rail Steel[J]. Special Steel, 2012, 33(5): 45-46. DOI：

摘要

U76CrRE钢(/%:0.71～0.80C、0.50～0.80Si、0.80～1.10Mn、0.04～0.10V、0.25～0.35Cr、0.02RE)和U75V钢(/%:0.70～0.78C、0.50～0.70Si、0.75～1.05Mn、0.04～0.08V)的冶炼工艺流程为铁水预处理-150 t复吹转炉-LF-VD 280 mm×380 mm连铸

LF精炼后通过喂稀土包芯线加入稀土。对钢的铸坯进行热塑性试验结果表明

加入稀土主要在第Ⅲ脆性区提高V微合金重轨钢的高温塑性

950～1225℃U76CrRE钢和U75V钢的平均断面收缩率Z值分别为83.34%和65.17%

1250℃U76CrRE钢和U75V钢的Z值分别为58%和12%。为防止铸坯出现裂纹

铸坯的矫直温度应≥900℃。

Abstract

Steelmaking flow sheet for steel U76CrRE (/%: 0. 71 〜0. 80C

0. 50 〜0. 80Si

0. 80 ~ 1. 10Mn

0. 04 - 0. 10V

0.25 〜0.35Cr

0. 02RE) and steel U75V (/%: 0. 70 ~ 0. 80C

0. 50 〜0.70Si

0. 75 〜1.05Mn

0. 04 〜 0. 08V) is hot metal pretreatment-150 t top and bottom combined blown converter-LF-VD-280 mm x 380 mm bloom casting

and RE is added in steel by feeding cladding RE wire after LF refining. The simulation test results on hot plasticity of steel casting bloom show that the hot plasticity of V microalloying heavy rail steel is increased by adding RE mainly in 皿 brittle zone

at 950 ~ 1 225 °C the average reduction of area Z value of steel U76CrRE and steel U75V is respectively 83. 34% and 65. 17%

and at 1 250 °C the Z value of steel U76CrRE and steel U75 V is respectively 58% and 12%. In order to prevent forming crack of casting bloom

the strengthening temperature of casting bloom should be ≥900 °C.

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