数值模拟板料轧制形变累积的研究  

Simulation on Deform Cumulation of Sheet Rolling

作　　者：赵茂俞[1] 薛克敏[2] 李萍[2] 

机构地区：[1]合肥学院机械工程系,合肥230601 [2]合肥工业大学材料科学与工程学院,合肥230009

出　　处：《合肥学院学报（自然科学版）》2015年第3期33-36,共4页Journal of Hefei University :Natural Sciences

基　　金：合肥学院学科带头人培养对象项目(2014dtr09);安徽省教育厅自然科学研究重大项目(KJ2011ZD09);安徽省自然科学基金面上项目(1308085ME77)基金资助

摘　　要：板料轧制形变累积有利于细化晶粒组织,而多道次轧制能增大轧制板料的等效应变与等效应力,实现细化晶粒的目的.以低碳低合金钢AISI-4140板料为研究对象,应用数值模拟软件,仿真轧制过程.通过板料厚度t=4mm轧制为2mm;厚度t=4mm轧制为3mm,再进一步轧制为2mm.对比分析板料的等效应变、等效应力分布,表明在同样变形量条件下,多道次轧制比一道次变形应力大,细化微观组织作用也大.另外,轧制跟踪点的等效应变与应力值在靠近上、下轧辊比中间区域数值大,该区域的晶粒细化明显.Deform cumulation of sheet rolling is propitious to refine grains, grain microstructure could be refined by increasing effective strain and effective stress employing with multi-rolling. The materials of low carbon low alloy steel AISI-4140 were roiled by simulation. The sheets were rolled from 4 mm to 2 mm,and from 4 mm to 3 mm,to 2 mm again. The value of effective stress in multi-rolling was bigger than the value in one-rolling when deformation was the same quantity,grains would be refined obviously. In addition, effective strain and effective stress of point tracking nearby top and bottom mill rolls were bigger thar＇, middle section, so the refine is apparent in the top and bottom area.

关 键 词：模拟 轧制 等效应变 等效应力 细化 

分 类 号：TG156[金属学及工艺—热处理] TG386[金属学及工艺—金属学]