Steelmaking Process and Quality Control of Cold-Heading Steel SWRCH35K by 120 t BOF-Argon Blowing-LF-CC Flowsheet

陈建东; 梁素英; 苏德利; 范耀东

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Steelmaking Process and Quality Control of Cold-Heading Steel SWRCH35K by 120 t BOF-Argon Blowing-LF-CC Flowsheet

更新时间：2026-01-21

- Steelmaking Process and Quality Control of Cold-Heading Steel SWRCH35K by 120 t BOF-Argon Blowing-LF-CC Flowsheet
- Special Steel Vol. 36, Issue 2, Pages: 40-43(2015)
- 作者机构：
  
  1. 上海重型机械厂有限公司大型铸锻件研究所,上海,200245
  2. 中天钢铁集团有限公司第三炼钢厂,常州,213011
  3. 江苏沙钢集团有限公司转炉炼钢厂，张家港,215625
  4. 龙腾特钢有限公司转炉炼钢厂，常熟,215511
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：15 October 2014，
  
  Online First：23 August 2022，
  
  Published：23 August 2015
- 稿件说明：
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陈建东, 梁素英, 苏德利, et al. Steelmaking Process and Quality Control of Cold-Heading Steel SWRCH35K by 120 t BOF-Argon Blowing-LF-CC Flowsheet[J]. Special Steel, 2015, 36(2): 40-43.
DOI：

陈建东, 梁素英, 苏德利, et al. Steelmaking Process and Quality Control of Cold-Heading Steel SWRCH35K by 120 t BOF-Argon Blowing-LF-CC Flowsheet[J]. Special Steel, 2015, 36(2): 40-43. DOI：

摘要

过KR铁水预脱硫[S]≤0.008%

BOF预脱氧加铝量由0.010%~0.025%提高到0.020%~0.035%

LF精炼时加Fe-Ca丝由3.0 m/t增至4.0 m/t

LF精炼时间≥35 min

白渣≥15 min

改进中间包结构

控制中间包钢水温度1520~1540℃

M-EMS电流由160 A提高至200 A

改善二次段喷雾冷却

控制拉速2.2~2.4m/min等工艺措施

生产的SWRCH35K冷镦钢（/%:0.29~0.31C，0.07~0.11Si，0.69~0.71Mn，0.009~0.010P，0.008S，0.038~0.041A1）160 mm×160 mm铸坯的碳偏析指数≤1.06

Φ6.5~20 mm热轧盘条组织为P+F

用其生产的8.8级及以上的标准件

免退火后模具损耗率仅约为8.5%。

Abstract

With the process measures including KR pre-sulphurizing hot metal [S] ≤0.008%

to increase BOF preoxidizing adding aluminium amount from 0.010%-0.025% to 0.020%-0.035%

to increase adding Fe-Ca wire from 3.0 m/t to 4.0 m/t

LF refining time ≥35 min and white slag time ≥15 min

improving tundish structure

controlling temperature of liquid in tundish 1520-1540 ℃.

increasing M-EMS current from 160 A to 200 A

improving fog cooling process in secondary cooling zone and controlling casting speed 2.2-2.4 m/min

the carbon segregation index of produced 160 mm x 160 mm casting billet of cold-heading steel SWRCH35K (/% : 0.29-0.31C

0.07-0.llSi

0.69-0.71Mn

0.009-0.010P

0.008S

0.038-0.041 Al) is ≤1.06

and the structure of Φ6.5-20 mm hot-rolled coil is P + F

the die attritions wear rate of ≥8.8 class standard products manufactured by the coil without annealing is only about 8. 5%.

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