Production Practice of Φ600 mm Round Bloom of HSLA Steel Q345E

王社教; 倪红卫; 尹修刚; 陈宏豫; 成日金

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Production Practice of Φ600 mm Round Bloom of HSLA Steel Q345E

更新时间：2026-01-21

- Production Practice of Φ600 mm Round Bloom of HSLA Steel Q345E
- Special Steel Vol. 34, Issue 5, Pages: 54-56(2013)
- 作者机构：
  
  1. 武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,武汉,430081
  2. 承德建龙特殊钢有限公司,承德,067201
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：06 May 2013，
  
  Online First：22 September 2022，
  
  Published：22 September 2013
- 稿件说明：
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王社教, 倪红卫, 尹修刚, et al. Production Practice of Φ600 mm Round Bloom of HSLA Steel Q345E[J]. Special Steel, 2013, 34(5): 54-56.
DOI：

王社教, 倪红卫, 尹修刚, et al. Production Practice of Φ600 mm Round Bloom of HSLA Steel Q345E[J]. Special Steel, 2013, 34(5): 54-56. DOI：

摘要

Q345E钢(/%:0.14~0.17C、0.20~0.30Si、1.28~1.38Mn、≤0.011P、≤0.005S、0.015~0.030Al、0.032~0.045V)大圆坯的生产流程为65 t LD-LF-VD-Φ600 mm圆坯CC工艺。通过出钢时滑板挡渣

加入预熔合成渣(/%:40~50CaO、≤9SiO

、30~40Al

~7MgO、8~10Al)、钢芯铝、脱氧剂和合金

控制拉速0.22 m/min

32 t中间包钢水过热度(25±5)℃

恒液面900 mm

全程保护浇铸和电磁搅拌等措施

试生产法兰用Q345E钢Φ600mm连铸圆坯。生产结果表明

铸坯表面无可见冷疤、鼓肚等缺陷

中心缩孔0.5级

中心疏松1.0级

碳偏析≤1.09

-50℃低温冲击功超过100 J

完全满足标准要求。

Abstract

The production flow sheet for heavy bloom of steel Q345E (/% : 0.14-0.17C

0.20-0.30Si

1.28-1.38Mn

≤0.011P

≤0.005S

0.015-0.030A1

0.032-0.045V) is 65 t LD-LF-VD-Φ600 mm round bloom CC process. With the measures including using sliding plate to stop slag in tapping

and adding pre-melted synthetic slag (/% : 40-50CaO

≤9SiO

30-40Al

3-7MgO

8-10A1)

steel-clad aluminium

deoxidizer and alloys

controlling casting speed 0.22 m/min

overheating extent of liquid (25 ± 5)℃ and constant liquid level 900 mm in 32 t tundish

whole process shield casting and electromagnetic stirring

the Φ600 mm casting round bloom of steel Q345E for flange is pilot-produced. The production results show that there is no visible surface defect such as scab and bulging

the rating of center li

ne shrinkage is 0.5

the center porosity 1.0 and the carbon segregation ≤1.09

and the impact energy of steel at -50 ℃ is more than 100 J

all meet the requirement.

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