GCr15轴承钢Φ380mm连铸圆坯V-偏析的宏观与微观形貌分析  

An Analysis on Morphology of Macro and Micro Structure of V-Segregation in Φ380 mm Continuous Casting Bloom of Bearing Steel GCr15

作　　者：黄拓[1] 任金朝 马忠伟[1] 王明林[1] 张慧[1] 

机构地区：[1]钢铁研究总院连铸技术国家工程研究中心,北京100081 [2]辽宁科技大学冶金与材料学院,鞍山114051

出　　处：《特殊钢》2014年第4期48-51,共4页Special Steel

基　　金：国家973项目(夹杂物稳定性及铸坯均匀度控制的研究)资助(2010CB630806)

摘　　要：研究了GCr15轴承钢φ380 mm连铸坯纵、横截面V-偏析的分布,以及V-偏析带的组织形貌。结果表明,V-偏析产生于铸坯中心等轴晶区,以铸坯中心线对称分布,各纵截面偏析带之间相互平行;横截面V-偏析形貌与切割位置相关,呈同心圆分布;V-偏析带存在大量液析碳化物,是引起严重偏析的重要原因。The distribution of V-segregation at longitudinal and cross section of Φ380 mm continuous casting bloom of bearing steel GCrl5 and the structure morphology of V-segregation band have been studied. Results show that the V-segregation forms in central equiaxial crystal zone by symmetrical about centre line of casting bloom and the segregation bands are parallel each another at longitudinal section ; and the morphology of V-segregation bands at cross section is related with cutting location which presents with concentric distribution; there is lots of liquation carbonide in V-segregation band that is an important factor to form serious segregation.

关 键 词：GCR15轴承钢 连铸圆坯 V-偏析 形貌和分布 液析碳化物 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG249.7[金属学及工艺—金属材料]