炼钢 ›› 2026, Vol. 42 ›› Issue (2): 46-53.

• 凝固与浇铸 • 上一篇    下一篇

Q195L包晶钢小方坯高拉速生产实践

华福波1,王  劼1,陶昌德1,谢  祥1,薛正良2   

  1. 1.首钢水城钢铁集团公司,贵州 六盘水 553028;
    2.武汉科技大学 钢铁冶金与资源利用省部共建教育部重点实验室,湖北 武汉 430081
  • 出版日期:2026-04-05 发布日期:2026-03-27

Practice of Q195L peritectic steel billet with high casting speed


  • Online:2026-04-05 Published:2026-03-27

摘要: Q195L包晶钢质量控制难度大,为控制连铸过程中漏钢和铸坯裂纹,原工艺的钢水锰硫比控制较高导致合金成本高,且连铸拉速小、生产效率低。为解决上述问题,从钢水成分、冶炼终点、脱氧合金化、连铸工艺等方面开展研究,并通过实践优化,Q195L包晶钢连铸漏钢率由4.2%降低至零、连铸拉速由2.4 m/min提高至3.0 m/min,铸坯质量稳定且满足轧钢要求。通过优化钢水成分以降低钢材强度,合金成本降低18元/t。

关键词: 小方坯, Q195L钢, 拉速, 实践

Abstract: The quality control of Q195L peritectic steel is difficult. In order to control  steel leakage and billet cracking during continuous casting, the high manganese sulfur ratio control in molten steel in the original process leads to high alloy costs. In addition, there are also problems such as low casting speed and low production efficiency. To solve the above problems, research was conducted from aspects such as composition of molten steel, smelting endpoint, deoxidation alloying, continuous casting process. Through practical optimization, the breakout rate of Q195L peritectic steel billet reduced from 4.2% to zero, and the continuous casting speed increased from 2.4 m/min to 3.0 m/min. The quality of billet was stable and met the requirements of steel rolling. By optimizing the composition of molten steel to reduce the strength of steel, the alloy cost reduced by 18 yuan/t.

Key words: billet, Q195L steel, casting speed, practice