321不锈钢中大型夹杂物的研究  

Study on the Large Inclusions in 321 Stainless Steels

作　　者：郑宏光[1] 陈伟庆[1] 李景捷[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《炼钢》2005年第4期24-27,共4页Steelmaking

基　　金：国家自然科学基金和上海宝钢集团公司联合资助;项目批准号:50374011

摘　　要：采用大样电解方法研究了321不锈钢冶炼连铸过程中大型夹杂物的类型和数量变化,分析了吹氩搅拌对大型夹杂物数量的影响。结果表明:喂钛线前,321不锈钢中的大型夹杂物主要有CaO-SiO2-Al2O3、CaO-MgO-SiO2、SiO2等;喂钛线后,由于[Ti]还原夹杂物中的SiO2,形成部分含TiO2的夹杂物。吹氩采用弱搅拌,不仅可以避免二次氧化,而且能够促使钢中夹杂物上浮。The types and the amount of the large inclusions in 321 stainless steel during steelmaking and casting process were investigated. The effect of Ar stirring on the amount of large inclusions were discussed. The results showed that there existed several type large inclusions including such inclusions as CaO-SiO_(2)-(Al_2O_3), CaO-MgO-SiO_(2), SiO_(2) in liquid prior to adding Ti wire to the molten steel. After feeding Ti wire to the liquid, a part of the large inclusions became those containing TiO_(2) because of reduction of SiO_(2 )in the large inclusions by \. Soft Ar stirring was employed not only to avoid reoxidation but also to make some large inclusions float out of the molten steel.

关 键 词：321不锈钢 大型夹杂物 大样 电解法 

分 类 号：TF704.7[冶金工程—钢铁冶金]