RH脱氧工艺优化对W470无取向硅钢洁净度的影响  

Effect of RH deoxidization process optimization on the cleanliness of W470 non-oriented silicon steel

作　　者：赵家七 邹长东 马建超 耿涛 

机构地区：[1]江苏省(沙钢)钢铁研究院,江苏张家港215625

出　　处：《炼钢》2015年第4期21-25,共5页Steelmaking

摘　　要：对江苏沙钢集团有限公司RH处理W470无取向硅钢脱氧工艺进行了优化研究。试验结果表明，RH终点钢水w（T.O）由（20-30）×10^-6降N（15-20）×10^-6，硅和锰氧化量减少，含SiO2、MnO类大尺寸复合夹杂的数量大幅度减少；铸坯中大尺寸复合夹杂数量进一步减少，电镜观察20μm以上夹杂物数量及最大夹杂物尺寸均大幅度降低；但由于顶渣T,Fe含量偏高，对钢水存在一定的二次氧化，铸坯中小尺寸Al2O3类夹杂数量依然较多。此外，工艺优化后，合金中硅和锰元素的收得率均有所提高。The process of RH deoxidization of W470 non-oriented silicon steel was opti- mized in Shasteel. The results showed that the total oxygen content of liquid steel at RH end was reduced from （20 - 30） ×10^-6 to （15 - 20） ×10^-6. Due to reducing the oxi- dation of silicon and manganese during the alloying process, the inclusions containing SiO2 and MnO reduced rapidly. The inclusion density of slab and the largest size of in- clusion observed by SEM decreased by a large margin. As a result of the secondary oxi- dation of liquid steel caused by the ladle slag, there was still a large number of inclu- sions with small size. Besides, the yield of silicon and manganese increased evidently.

关 键 词：无取向硅钢 RH脱氧工艺 高铝质夹杂 二次氧化 

分 类 号：TF769.4[冶金工程—钢铁冶金]