钢液预处理→120t转炉→钢包精炼→真空脱气→连铸流程生产GCr15轴承钢的纯净度  

Cleanliness of GCr15 Bearing Steel Produced by Hot Metal Pretreatment→120 t LD→LF→RH→CC Process

作　　者：范植金[1] 罗国华[1] 徐志东[1] 王瑞敏[1] 

机构地区：[1]武汉钢铁(集团)公司,武汉430080

出　　处：《理化检验（物理分册）》2011年第12期744-747,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：对7炉采用钢液预处理→120t转炉→钢包精炼→真空脱气→连铸流程生产的GCr15轴承钢进行了氧、氮及残余元素含量分析、非金属夹杂物评级、夹杂物电子探针观察和能谱分析以及电解夹杂物等分析。结果表明:采用该流程生产的GCr15轴承钢的纯净度较高,尤其是氮元素含量和残余元素含量均比电炉流程生产的GCr15轴承钢明显降低;钢中的夹杂物主要是铝酸钙和氧化铝,也有少量的硫化物和氮化物,而且总是以复合夹杂物的形式存在。The oxygen,nitrogen and residual elements contents,non-metallic inclusions rating and inclusions morphology and compositions of 7 furnaces GCr15 bearing steel produced by technological process of hot metal pretreatment→120 t LD→LF→RH→CC were analyzed.The results indicate that the cleanliness of the steel was rather high,and especially the nitrogen and residual elements contents were reduced obviously,comparing with GCr15 bearing steel produced by electric furnace.The inclusions were mainly calcium aluminate,alumina,and also a small amount of sulfide and nitride,and the inclusions were always existed as complex inclusions.

关 键 词：LD转炉 GCR15轴承钢 纯净度 复合夹杂物 

分 类 号：TG142.1[一般工业技术—材料科学与工程]