Q355生产过程非金属夹杂物演变研究
Study on the Evolution of Non-metallic Inclusions in the Production Process of Q355
潘立军 1王子豪 2王伟健 3张立峰3
作者信息
- 1. 天津市新天钢联合特钢有限公司,天津 301500
- 2. 东北大学冶金学院,辽宁 沈阳 110167
- 3. 北方工业大学机械与材料工程学院,北京 100144
- 折叠
摘要
针对Q355钢种进行生产全流程取样分析,研究钢液洁净度以及非金属夹杂物的成分、尺寸等在生产过程中的转变情况.结果表明,钙处理前,钢中夹杂物主要为Al2O3,由于转炉出钢过程添加的合金含有少量的钙元素,夹杂物中还有少量的CaO.钙处理过程由于加钙量不足,夹杂物转变为未完全改性的液态钙铝酸盐.随着冷却过程的进行,CaS逐渐析出,夹杂物变为Al2O3-CaS复合夹杂物.同时,使用热力学软件FactSage计算出当前生产条件下合理的喂钙量.热力学计算结果与实际生产结果一致.
Abstract
Sampling analysis was conducted on the entire production process of Q355 steel to study the changes in the cleanliness of molten steel and the composition and size of non-metallic inclusions during the production process.The results showed that before calcium treatment,the inclusions in the steel were mainly Al2O3.Due to the addition of a small amount of calcium element in the alloy during the steelmaking process of the converter,there was also a small amount of CaO in the inclusions.Insufficient calcium addition during the calcium treatment process results in the transformation of inclusions into partially modified liquid calcium aluminate salts.As the cooling process progresses,CaS gradually precipitates and the inclusions become Al2O3-CaS composite inclusions.Meanwhile,using thermodynamic software FactSage,the reasonable calcium feeding amount under current production conditions was calculated.The thermodynamic calculation results are consistent with the actual production results.
关键词
钙处理/夹杂物析出/热力学计算Key words
calcium treatment/precipitation of inclusions/thermodynamic calculation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据