作　　者： ; ; ; ; ; ; ;

机构地区： 首钢集团

出　　处： 《炼钢》 2013年第4期49-52,66,共5页

摘　　要： 研究了国内某厂生产X80管线钢精炼过程中夹杂物的转变。BOF出钢阶段加铝脱氧,钢中夹杂物以伴有极少量MgO的Al2O3为主;LF过程采用高碱度高还原性渣精炼,钢中Al2O3夹杂物向钙铝酸盐和CaO-MgO-Al2O3复合夹杂物转变,平均成分靠近低熔点区;RH真空处理后,夹杂物中Al2O3和MgO的含量减少,CaO含量增加,夹杂物成分分布较为分散;钙处理后,钢中CaO-MgO-Al2O3复合夹杂比例明显减少,CaO与CaS比例明显增加,夹杂物平均成分已经远离低熔点区,达到了高品质管线钢的冶炼效果。 The change of nonmetallic inclusions in X80 pipeline steel produced by a domestic plant has been studied. With adding aluminum during BOF tapping for intensifying deoxidation, the most of inclusions were Al2O3accompanied a little MgO. High basicity and reducibility refining slag were used in LF refining process, the Al2O3 inclusions in steel were transformed to calcium aluminates and CaO-MgO-Al2O3 complex compound inclusions whose average composition was close to low melting point zone. After RH process, the content of Al2O3 and MgO in inclusions were decreased while the content of CaO was increased, the distribution of inclusion composition was dispersed. After calcium treatment, the proportion of CaO-MgO-Al2O3complex compound inclusions were decreased, while the proportion of CaO and CaS inclusions were increased, the average composition was far from low melting point zone, the metallurgical effect of high quality pipeline steel was achieved.

关 键 词： 管线钢 二次精炼 夹杂物转变

领　　域： [冶金工程]