ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2014, Vol. 35 ›› Issue (4): 48-51.

• 组织和性能 • 上一篇    下一篇

GCr15轴承钢ø380 mm连铸圆坯V-偏析的宏观与微观形貌分析

黄拓, 任金朝, 马忠伟, 王明林, 张慧   

  1. 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
  • 收稿日期:2014-02-11 出版日期:2014-08-01 发布日期:2022-09-03
  • 作者简介:黄拓(1989-),男,硕士研究生(钢铁研究总院),2011年西安建筑科技大学(本科)毕业,连铸工艺技术、铸坯及铸锭凝固组织细化。
  • 基金资助:
    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)

An Analysis on Morphology of Macro and Microstructure of V-Segregation in ø380 mm Continuous Casting Bloom of Bearing Steel GCr15

Huang Tuo1, Ren Jinzhao1,2, Ma Zhongwei1, Wang Minglin1, Zhang Hui1   

  1. 1 National Engineering Research Center of Continuous Casting Technology, Central Iron and Steel Research Institute, Beijing 100081;
    2 School of Metallurgy and Material, Liaoning University of Science and Technology, Anshan 114051
  • Received:2014-02-11 Published:2014-08-01 Online:2022-09-03

摘要: 研究了GCr15轴承钢ø380 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。

关键词: GCr15轴承钢, 连铸圆坯, V-偏析, 形貌和分布, 液析碳化物

Abstract: The distribution of V-segregation at longitudinal and cross section of ø380 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 center 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.