ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2021, Vol. 42 ›› Issue (2): 38-41.

• 工艺技术 • 上一篇    下一篇

38CrMoAl钢浇铸过程水口结瘤原因分析及工艺改进

王郢,徐建飞,何西,王昆鹏,万文华,孙光涛   

  1. 中天钢铁集团有限公司技术中心,常州213011
  • 出版日期:2021-04-01 发布日期:2022-04-15
  • 作者简介:王郢(1979-),男,博士(北京科技大学),高级工程师,2001年武汉科技大学(本科)毕业,特殊钢工艺质量研究。

Analysis on Nozzle Clogging during Continuous Casting of Steel 38CrMoAl and Process Improvement

Wang Ying, Xu Jianfei, He Xi, Wang Kunpeng, Wan Wenhua,Sun Guangtao   

  1. Technology Center, Zenith Steel Group Co Ltd, Changzhou 213011
  • Published:2021-04-01 Online:2022-04-15

摘要: 38CrMoAl钢120t BOF-LF-RH-CC冶炼过程钢中夹杂物主要以CaS和A12O3为主,并且随着精炼的进行,夹杂物中CaS含量逐渐升高,AI2O3含量逐渐降低。通过钙处理试验,得出采用钙处理工艺,不仅不能有效变性 38CrMoAl钢中夹杂物,反而会产生更多CaS夹杂物,最终引发由CaS产生的水口结瘤。工业试验结果表明,在RH原工艺基础上取消钙处理工艺,将LF精炼结束钢水硫含量降低至0.001% -0.002%,可以很好的改善钢水浇铸性

关键词: 38CrMoAl钢, 钙处理, CaS, 水口结瘤

Abstract: The ingredient of main inclusions in 38CrMoAl steel by 120 t BOF-LF-RH-CC process is A12O3 and CaS. The CaS content decreases and the A12O3 content increases with the time of refining. By calcium treatment experiments, it is obtained that the inclusions of 38CrMoAl steel could not be modified by calcium treatment, on the contrary, more CaS inclusions could be obtained by calcium treatment, leading to nozzle clogging during continuous casting of 38CrMoAl steel. The results of industrial experiments show that a good casting is obtained when the sulfur content after LF refining is controlled at 0.001% ~0.002% and no calcium is added after RH degassing.