Abstract：Solidification and composition segregation of billet are important factors which affect homogeneity of mechanical property of steel. In order to study heredity of solidification structure and segregation of spring steel billet rolled,the 60Si2Mn billets with different equiaxed grain rate and segregation degree are used as experiment object in this paper. The billets whose section size is 150mm×150mm has been rolled into two round bars whose diameter are 75mm and 25mm separately.The mechanical property at interior different position of rolled steel and segregation index of billets with different equiaxed grain rate have been measured. The result show that the carbon segregation index in off center area where the distance to billet core exceed 21.2 mm does not improved while equiaxed grain rate is increased.Porosity and light segregation existed within rolled steel and the inner mechanical property is poor relatively.Therefore central segregation and porosity of billet would inherit to rolled steel.The mechanical property and its uniformity of round bar whose diameter is 25mm is better than that of round bar whose diameter is 75mm.As a result,adding rolling reduction would lighten heredity effect of billet central segregation.
杨武 陶红标 赵沛 颜慧成 仇圣桃. 弹簧钢轧制过程方坯凝固组织及偏析的遗传性研究[J]. 钢铁, 2010, 45(9): 32-32.
Wu YANG Pei ZHAO . Research on Heredity of Solidification Structure and Segregation of Spring Steel Billet Rolled. Iron and Steel, 2010, 45(9): 32-32.
2010, Vol. 45 
