复杂断面型钢热轧过程的综合数值分析  

Integrative numerical analysis of complex cross-section shape-metal in hot rolling process

作　　者：贺庆强[1] 张勤河[2] 张海龙[2] 

机构地区：[1]中国石油大学机电工程学院,山东东营257061 [2]山东大学机械工程学院,山东济南250061

出　　处：《重型机械》2008年第4期11-16,共6页Heavy Machinery

基　　金：山东省科技创新资助项目(2003182)

摘　　要：通过模拟高温下金属的塑性变形过程,利用实验所得流变应力数据,建立能准确反映应变速率和流变应力的整体流变应力模型。并提出基于网格重构的数值分析方法,用于分析H型钢多道次热轧过程中轧件的微观组织演变过程,腹板处奥氏体晶粒较小,比较均匀;翼缘处奥氏体晶粒较大,不均匀。为轧制规程的制定提供依据。The process of metal plastic deformation at high temperature was studied by using Gleeble-1500 tester. So an integrated flow stress model reflecting the relation between the deformation rate, temperature and the flow stress accurately was developed based on the test results. Furthermore, a re-mesh technique was proposed to analyze the microstructure evaluation of the H-beam in the multi- pass hot rolling process. And the numerical results shows that the anstenite grain at the H-beam web was fine, but those at the H - beam flank were coarse. The result is valuable for making an optimal rolling schedule.

关 键 词：长型材 综合数值分析 VUMAT子程序 

分 类 号：TG335[金属学及工艺—金属压力加工]