摘要
针对石钢60tLD-LF-VD-CC生产工艺,对4炉采用不同钢包软吹氩时间的GCr15轴承钢进行取样分析.采用金相显微镜和扫描电镜结合能谱分析,研究了4炉轴承钢中间包样品中夹杂物的尺寸分布及种类特征.结果表明,随着精炼后软吹氩时间的延长,GCr15轴承钢中全氧质量分数降低,中间包中的夹杂物平均直径减小,大于15μm的夹杂物比例也明显降低,但对夹杂物的种类没有明显影响.钢中夹杂物主要为Al_2O_3、MgO·Al_2O_3和MgO-Al_2O_3-SiO_2-CaO(CaS)夹杂物等,这与冶金热力学计算结果一致.
Aimed at60t LD-LF-VD-CC process at a plant in China Shijiazhuang Iron and Steel Co.Ltd.,four GCr15steel samples were taken from the tundish,treated by the different soft argon blowing times in the ladle.Inclusions in the steels were investigated by metallographic microscope(OM)and scan electron microscope(SEM).The results showed that,with increase of the soft argon blowing time in ladle,the total oxygen content in GCr15bearing steel and the mean diameter of the inclusion decreases,and inclusions bigger than15μm evidently debases,however,the inclusion type does not change so much.They are still Al2O3,MgO·Al2O3and MgO-Al2O3-SiO2-CaO(CaS)ect.This is consistent with the thermodynamical calculation.
作者
杨锋功
杨华峰
战东平
杨永坤
张慧书
Yang Fenggong;Yang Huafeng;Zhan Dongping;Yang Yongkun;Zhang Huishu(Steelmaking Plant of Shijiangzhuang Iron and Steel Co Ltd , Shijiangzhuang 050031, China;School of Metallurgy, Northeastern University, Shenyang 110004, China;School of Metallurgical Engineering, Liaoning Institute of Science and Technology, Benxi 117004, China)
出处
《材料与冶金学报》
北大核心
2017年第4期246-249,共4页
Journal of Materials and Metallurgy
基金
国家重点研发计划(2017YFB0304203)
关键词
轴承钢
夹杂物
软吹氩
钢包
中间包
bearing steel
inclusions
soft argon blowing
ladle
tundish
