摘要
为改善断面直径为300 mm的35CrMnSi合金结构钢连铸圆坯中心元素偏析及径向元素分布均匀性,利用上海大学先进凝固技术中心团队研发的脉冲磁致振荡技术(Pulsed Magneto Osillation,简称PMO)在连铸二冷区进行均质化调控,发现同流次生产钢中碳元素沿铸坯径向分布均匀性提高,铸坯径向碳极差值下降幅度超过40%,Cr、Mn、Si三种元素在铸坯心部区域分布极差值下降幅度分别为18%、16%、33%,C、Cr、Mn、Si元素在铸坯心部严重偏聚现象基本消除。在未改变原有连铸工艺条件下实现了35CrMnSi合金结构钢铸坯元素分布改善,为调控?300 mm断面圆坯心部质量,改善中心偏析提供了新的手段。
In order to improve the central segregation and radial distribution of solutes of the 35CrMnSi alloy constructional steel continuous casting billet with a section diameter of 300 mm,Pulsed Magneto-Osillation(PMO)technology developed by the Center for Advanced Solidification Technology was applied.With the PMO treatment in the secondary cooling zone,the distribution uniformity of C along the radial direction of the billet was improved,the range of C decreased by more than 40%,and the ranges of Cr,Mn,Si in the center of the billet decreased by 18%,16%and 33%,respectively.The serious segregation phenomena of C,Cr,Mn and Si in the center of the billet were eliminated.The solutes distribution of 35CrMnSi alloy constructional steel billet was improved without changing the original continuous casting process.It provides a new method to improve the central segregation by improving the center quality ofø300 mm round billet.
作者
张亚兵
王东兴
赵立
左小坦
黄雁
杨伟勇
ZHANG Ya-bing;WANG Dong-xing;ZHAO Li;ZUO Xiao-tan;HUANG Yan;YANG Wei-yong(Institute of Research of Iron and Steel,Wuhu Xinxing Casting Pipe Co.,Ltd.,Wuhu 241002,Anhui,China)
出处
《连铸》
2023年第2期78-83,共6页
Continuous Casting
关键词
PMO
元素分布
连铸坯
合金结构钢
中心偏析
PMO
solute distribution
continuous casting billet
alloy constructional steel
central segregation
