摘要
通过热力学分析结合现场试验,采用金相分析、扫描电镜、能谱分析等方法,研究了铝镇静钢中氧化物夹杂的变性处理工艺。热力学计算结果表明,当钢中的[Al]s质量分数为0.025%,钙处理时控制钢中钙质量分数高于22×10-6,硫质量分数低于0.008%时,可较容易地将Al2O3夹杂变性为低熔点的C12A7。对天津钢厂生产石油套管钢的LF精炼工艺进行了优化,通过强化钢水钙处理,使钢中钙含量有了显著提高,使夹杂物形态的控制大为改善。
The oxide inclusions modality controlling process of aluminium-killed steel was studied and field test was carried out, the analytical techniques such as metallographic examination, SEM, EDS were applied to distinguish the inclusions. The thermodynamic calculation result showed that when the dissolved aluminum [ Al]3 content was about 0. 025%, if the content of calcium more than 22 × 10^-6 , sulphur content less than 0. 008%, it can easily to modify Al2O3 into low melting point C12 A7. The LF refining process of oil casing steel at Tianjin Steel Works was optimized. By strengthening the calcium treatment, the actual content of calcium was significantly increased, the inclusions modality in steel were improved obviously.
出处
《钢铁》
CAS
CSCD
北大核心
2010年第11期37-40,共4页
Iron and Steel
关键词
夹杂物
热力学
酸溶铝
钙处理
inclusion
thermodynamics
acid-soluble aluminum
calcium treatment
