CSP产线高强钢冶炼关键工艺技术研究

炼钢 ›› 2015, Vol. 31 ›› Issue (1): 31-34.

CSP产线高强钢冶炼关键工艺技术研究

王春锋

武汉钢铁（集团）公司股份公司条材总厂CSP分厂

收稿日期:2014-03-05 修回日期:2014-07-15 接受日期:1900-01-01 出版日期:2015-02-05 发布日期:2015-02-13
通讯作者: 王春锋 E-mail:13871333268@163.com

The research of the key smelting technology of high-strength steel of CSP

WANG Chun-fengChun-Feng

CSP Plant of Wuhan Iron & Steel Corp

Received:2014-03-05 Revised:2014-07-15 Accepted:1900-01-01 Online:2015-02-05 Published:2015-02-13
Contact: WANG Chun-fengChun-Feng E-mail:13871333268@163.com

摘要/Abstract

摘要： 通过对比试验确定了采用“BOF→LF→RH→CC”流程生产高强钢WYS700，该工艺流程合金收得率和成分命中率高，过程增氮少，成品氮含量低。为保证浇钢顺利进行，对钢水进行轻钙处理，硅钙线用量0.88 kg/t，轻钙处理工艺后，连浇炉数由4炉提高至7炉。通过扫描电镜观察，中间包钢中非金属夹杂物基本呈球形，分布比较分散，夹杂物的尺寸基本小于5 μm，达到了夹杂物变性的目的，改善了钢水可浇性。通过控制钢水成分、温度，优化结晶器倒锥度，调整比水量，优化保护渣与结晶器流场等，高强钢漏钢率由1.90 %降低到0.35 %，铸坯裂纹改判率由5.5 %降低到0.45 %。

关键词: CSP, 高强钢, 夹杂物, 钙处理, 裂纹

Abstract: The BOF→LF→RH→CC process, by which the data shows the higher alloy yield rate and component-targeting rate, and the less nitrogen content in the steel, has been adopted in the production of high-strength steel WYS700 after the contrast test. In order to ensure a smooth casting, the molten steel has been light calcium treated, in which the dosage of calcium silicon was 0.88 kg/t. After that, the continuous casting has been raised from 4 heats to 7 heats. Through the scanning electron microscope, the nonmetallic inclusion in tundish was observed as sphere and scattered basically, small than 5 μm in principle, which can denature to improve the continuous cast-ability. Through the optimization of component, temperature, water yield, casting powder, and flow field, the leakage rate of high-strength steel was reduced from 1.90 % to 0.35 %, and the crack defective percentage of casting blank was reduced from 5.5 % to 0.45 %.

Key words: CSP, high-strength steel, inclusions, calcium treatment, crack

杜秀峰，王春锋，刘先同，赵继宇，谭佳梅，吴维轩，朱志强. CSP产线高强钢冶炼关键工艺技术研究[J]. 炼钢, 2015, 31(1): 31-34.

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