Development and Production of  Φ500 ~ 800 mm Concasting Bloom of S355NL Steel for Wind Power Flange by 100 t EAF-LF-VD-CCM Flow Sheet

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Development and Production of Φ500 ~ 800 mm Concasting Bloom of S355NL Steel for Wind Power Flange by 100 t EAF-LF-VD-CCM Flow Sheet

更新时间：2026-01-21

- Development and Production of Φ500 ~ 800 mm Concasting Bloom of S355NL Steel for Wind Power Flange by 100 t EAF-LF-VD-CCM Flow Sheet
- Special Steel Vol. 36, Issue 1, Pages: 28-30(2015)
- 作者机构：
  
  莱芜钢铁集团有限公司特钢事业部,莱芜,271105
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：09 September 2014，
  
  Online First：29 August 2022，
  
  Published：29 August 2015
- 稿件说明：
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于学文, 于辉, 谷昊. Development and Production of Φ500 ~ 800 mm Concasting Bloom of S355NL Steel for Wind Power Flange by 100 t EAF-LF-VD-CCM Flow Sheet[J]. Special Steel, 2015, 36(1): 28-30.
DOI：

于学文, 于辉, 谷昊. Development and Production of Φ500 ~ 800 mm Concasting Bloom of S355NL Steel for Wind Power Flange by 100 t EAF-LF-VD-CCM Flow Sheet[J]. Special Steel, 2015, 36(1): 28-30. DOI：

摘要

通过电弧炉兑60%铁水

大量换渣操作

使用低钛合金控制电弧炉终点[Ti

]

≤7×10

-6

LF精炼采用低钛脱氧合金化材料

控制LF终点[Ti

]

≤30×10-6

VD 27 min处理

控制中间包钢水过热度20~30℃全程保护浇铸等工艺措施

成功试生产出S355NL风电法兰用钢Φ500~800 mm连铸坯(/%:0.14~0.15C

0.21~0.23Si

1.30~1.33Mn

0.03~0.04Nb

≤0.003Ti

0.04~0.05V

≤0.010P

≤0.003S

0.02~0.04Alt)。检验结果表明

该钢锻件的综合机械性能良好

-50℃冲击功为87.4~100.3 J

用户产品无损探伤合格率达99.5%。

Abstract

With the process measures including arc furnace charging 60% hot metal

changing large amount of slag operation

using low titanium alloy to control arc furnace end [Ti

]

≤7 x 10

-6

using low titanium deoxidizer and alloying materials in LF refining process to control LF end [Ti

]

≤30 x 10_6

VD treatment for 27 min

controlling tundish liquid superheating extent 20 ~30 ℃ and whole course shielding casting

the

1>500 - 800 mm concasting bloom of S355NL steel for wind power flange (/% : 0. 14 ~ 0. 15C

0. 21 ~ 0. 23Si

L 30 ~ 1. 33Mn

0.03 ~ 0. 04Nb

≤0.003Ti

0.04 ~ 0. 05V

≤0. 010P

≤003S

0. 02 ~0. 04Alt) has been successfully pilot-produced. The examination results show that the comprehensive mechanical properties of steel are better

the impact energy at -50℃

is 87. 4 〜100. 3 J

and user products nondestructive testing qualified rate is up to 99. 5%.

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