中厚板轧制厚度方向上不均匀变形  

Inhomogeneous Deformation along the Direction of Plate Thickness during Rolling

作　　者：张宏亮[1] 冯光宏[1] 

机构地区：[1]钢铁研究总院冶金工艺研究所,北京100081

出　　处：《特钢技术》2015年第2期11-15,共5页Special Steel Technology

基　　金：国家科技支撑计划资助项目(2013BAE07B04)

摘　　要：通过对中厚板轧制过程中厚度方向变形的有限元计算,分析了不同压下率下的厚度方向变形特点,并对不同工艺参数对中厚板心部变形的影响进行了研究。计算结果表明,压下率变化显著影响钢板厚度方向上的变形分布,当压下率小于5%时,变形主要集中于表层,钢板内层变形较小,心部变形最小。当压下率大于5%小于25%时,金属内层变形最大,表层变形小于内层变形,心部变形更小。当压下率大于25%时,表层变形最大,其次是内层,最后是心部区域。合理的提高压下率对增大中厚板心部的压缩变形是最根本的,也是最有效的。本研究的意义在于,从轧钢工序提高中心变形,来改善中心质量缺陷问题,指导生产实践,制定合理的轧制工艺。Through finite element calculations of the deformation along the direction of plate thickness during rolling, the thickness deformation characteristics in different reduction ratio was analyzed, and the effect of different process parameters on the deformation of central portion of plate was studied. The calculated results indicated that reduction ratio significantly affected the deformation along the direction of plate thickness. When the reduction ratio was less than 5%, the deformation was mainly concentrated in the surface layer;the inner layer deformation was rela?tively small, and the minimum deformation occurred in the center. When the reduction ratio was between 5% and 25%, the maximum deformation occurred in inner layer;the deformation in surface layer was less than that in inner layer, and the deformation in the center was smaller. When the reduction ratio was greater than 25%, the maximum deformation occurred in the surface layer;the relatively small deformation occurred in the inner layer, and the mini?mum deformation occurred in the center. The most effective way to increase the deformation in the center was to in?crease reasonably the reduction ratio, so the quality problems in the center could be solved.

关 键 词：中厚板轧制 不均匀变形 有限元计算 

分 类 号：TG335.5[金属学及工艺—金属压力加工]