钢液加钙量对含硫钢中夹杂物瞬态演变影响

炼钢 ›› 2026, Vol. 42 ›› Issue (5): 43-50.

钢液加钙量对含硫钢中夹杂物瞬态演变影响

王伟健¹,崔猛²,姜宁¹,常海³,张立峰¹

1.北方工业大学机械与材料工程学院,北京 100144;2.天津市新天钢联合特钢有限公司,天津 301500;3.中冶京诚工程技术有限公司,北京 100176

出版日期:2026-09-28 发布日期:2026-09-28

Effect of calcium addition amount on transient evolution of inclusions in sulfur-containing steel

WANG Weijian¹, CUI Meng², JIANG Ning¹, CHANG Hai³, ZHANG Lifeng¹

1.School of Mechanical and Materials Engineering, North China University of Technology, Beijing 100144, China;2.Tianjin New Tiangang United Special Steel Co., Ltd., Tianjin 301500, China;3.Capital Engineering and Research Incorporation Limited, Beijing 100176, China

Online:2026-09-28 Published:2026-09-28

摘要/Abstract

摘要： 通过向钢中加入不同质量的硅钙合金,研究了不同钙含量对含硫钢中夹杂物的瞬态演变的影响。在低钙含量条件下,夹杂物成分变化较小,其尺寸和数量随保温时间延长呈增长趋势,夹杂物上浮去除效率较低。在高钙含量条件下,CaS夹杂物分解速度较快且上浮去除效率较高,保温30 min时高低钙含量样品的夹杂物数量与面积分数相近。含硫钢中钙含量较高时能够促进Al?O?夹杂物的改性,形成更多液态和半液态夹杂物,同时提高夹杂物的液相分数。因此采用较高钙含量工艺更有利于实现含硫钢中夹杂物的有效改性和液态窗口的优化调控。

关键词: 钙处理;含硫钢;夹杂物转变

Abstract: The effect of different calcium contents on the transient evolution of inclusions in sulfur-containing steel was studied by adding silicon calcium alloys to the steel. Under low calcium content conditions, the composition of inclusions changed little, the size and quantity showed an increasing trend and resulting in a lower removal efficiency. Under high calcium content conditions, the decomposition of CaS inclusions was rapid and the removal efficiency of inclusions was high. After 30 min of holding, the number density and area fraction of inclusions in the steel with high and low calcium content were almost the same. Therefore, high calcium content could promote the modification of Al?O? inclusions, generating more liquid and semi-liquid inclusions, while improving the liquid phase fraction of inclusions. Therefore, adopting a higher calcium content process was more conducive to effectively modifying inclusions in sulfur-containing steel and optimizing the liquid window control.

Key words: calcium treatment; sulfur-containing steel; inclusions transformation

. 钢液加钙量对含硫钢中夹杂物瞬态演变影响[J]. 炼钢, 2026, 42(5): 43-50.