Effect of Controlling Rolling and Cooling Parameters on Low Temperature Impact Toughness of Q345E Steel for Wind Power Flange

杨顺虎; 朱苗勇; 王忠英

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Effect of Controlling Rolling and Cooling Parameters on Low Temperature Impact Toughness of Q345E Steel for Wind Power Flange

更新时间：2026-01-21

- Effect of Controlling Rolling and Cooling Parameters on Low Temperature Impact Toughness of Q345E Steel for Wind Power Flange
- Special Steel Vol. 36, Issue 3, Pages: 64-66(2015)
- 作者机构：
  
  1. 东北大学材料与冶金学院,沈阳,110004
  2. 江苏沙钢集团淮钢特钢股份有限公司,淮安,223002
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：15 December 2014，
  
  Online First：18 August 2022，
  
  Published：18 August 2015
- 稿件说明：
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杨顺虎, 朱苗勇, 王忠英. Effect of Controlling Rolling and Cooling Parameters on Low Temperature Impact Toughness of Q345E Steel for Wind Power Flange[J]. Special Steel, 2015, 36(3): 64-66.
DOI：

杨顺虎, 朱苗勇, 王忠英. Effect of Controlling Rolling and Cooling Parameters on Low Temperature Impact Toughness of Q345E Steel for Wind Power Flange[J]. Special Steel, 2015, 36(3): 64-66. DOI：

摘要

低合金高强度钢Q345E（/%:0.12~0.15C

0.20~0.25Si

1.40~1.50Mn

≤0.010P

≤0.005S）的生产流程为80 t顶底复吹转炉-LF-RH-Φ450 mm铸坯CC-Φ110 mm棒材连轧工艺。工艺试验了压缩比（10.33~20.25）、开轧温度（1120~1 080℃）和冷却方式（0.2℃/s空冷和0.5℃/s风冷）对该钢-40℃

V-型缺口冲击韧性的影响。结果表明

随压缩比增加

开轧温度降低

冷却速度增加

该钢-40℃冲击功显著增加

采用压缩比16.74

开轧温度1100℃

0.5℃/s风冷工艺

Q345E钢组织细小、均匀

-40℃冲击功为40 J。

Abstract

The production flowsheet for low alloy high Strength steel Q345E (/% ： 0. 12 ~ 0. 15C

0. 20 ~ 0. 25Si

1. 40 ~ 1. 50Mn， ≤0. 010P

≤0. 005S) is 80 t top and bottom combined blown converter- LF- RH- Φ450 mm bloom CC-Φ110 mm bar continuous rolling process. The effect of reduction ratio ( 10. 33 ~ 20. 25)

beginning rolling temperature (1 120 ~ 1 080 ℃ ) and cooling mode (0. 2 ℃/s air cooling and 0. 5 ℃/s wind cooling) on V-notch impact energy of steel at -40 ℃ has been commercial-tested. Results show that with increasing reduction ratio

decreasing beginning rolling temperature and increasing cooling speed the impact energy of steel at -40 ℃ obviously increases; and with using reduction ratio 16. 74

beginning rolling at 1 100 °C and 0. 5 °C/s wind cooling process

the steel Q345E has fine and homogeneous structure and its impact energy at -40 ℃ is 40 J.

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