AISI1008圆钢混晶原因分析及有限元模拟和工艺改进  

Analysis and Finite Element Simulation of Mixed Grain of Round Steel AISI1008 and Process Improvement

作　　者：万文华 徐乐钱 沙鹏飞 左锦中 林俊 刘宇 Wan Wenhua;Xu Leqian;Sha Pengfei;Zuo Jinzhong;Lin Jun;Liu Yu(Technology Center,Zenith Steel Group Co Ltd,Changzhou 213011)

机构地区：[1]中天钢铁集团有限公司技术中心,常州213011

出　　处：《特殊钢》2021年第2期42-45,共4页Special Steel

摘　　要：在棒材线轧制锻造爪机用AISI1008钢时,出现混晶现象,Φ50 mm棒材边缘铁素体晶粒度3级,1/2半径及心部铁素体晶粒度8级,通过对钢材进行金相组织及电镜检验,对轧制过程温度及等效应变利用Deform软件进行有限元模拟,发现造成圆钢边缘晶粒粗大的原因与终轧温度过低及轧制等效应变大且分布不均有关,将终轧温度由原820℃提高至880℃,成功改善了圆钢横截面混晶现象。During rolling steel AISI1008 for claw machine in rolling line of steel bar,the mixed crystal phenomenon occurs.The ferrite grain size rating at the edge,1/2 radius and center of Φ50 mm rolled bar is respectively 3,8 and 8.Through metallographic and electron microscopic examination of round steel,the finite element simulation of finish rolling temperature and equivalent strain is carried out by using Deform software.It is found that the cause of coarse grain size at the edge of round steel is related to the low finish rolling temperature and the large equivalent strain during rolling.With improvement measures to increase the finish rolling temperature from 820℃to 880℃,the uniformity of section grain size of round steel is successfully improved.

关 键 词：AISI1008钢 混晶 终轧温度 等效应变 有限元模拟 

分 类 号：TG335[金属学及工艺—金属压力加工]