铝镇静钢夹杂物形态控制工艺研究

来源期刊：钢铁2010年第11期

论文作者：姚同路 刘浏 李树庆 吴波 王宝明 王永然

文章页码：37 - 40

关键词：夹杂物； 热力学； 酸溶铝； 钙处理

Key words：inclusion； thermodynamics； acid-soluble aluminum； calcium treatment

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。

Abstract: 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 s 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 C₁₂A₇.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.