重型机械Issue(3)：59-64,6.
驱动辊转速对铸态42CrMo钢环件热辗轧微观组织的影响规律
Effects of rotational speed of driving roll on microstructure evolution during hot ring rolling of as-cast 42 CrMo steel
摘要
Abstract
The evolution rules and reasonable regulation of the microstructure of the as-cast ring blank material is the main bottleneck question for the development of the new casting-rolling composite forming technology. The rotational speed of the main roll is one of the key factors influencing the recrystallization behavior and mi-crostructure of the as-cast ring blank material. In this paper, we first established a coupled macro-micro FE model of hot ring rolling for as-cast 42CrMo steel under ABAQUS software environment, then numerically revealed dynamic recrystallization (DRX) behavior of as-cast ring blank material, and lastly clarified the effect rules and mechanism of the rotational speed of the main roll on grain size and its distribution. The results show that; (1) The DRX percentages is high in the inner and outer layers of the ring leading to refined grain while relatively low in the middle layer of the ring resulting in coarse grain; (2) the DRX percentage increases while the average grain size decreases with the increase of the rotational speed of the main roll; and (3 ) the rotation speed of the main roll has negligible effect on the uniformity of the distribution of the average grain size.关键词
环件铸辗复合成形/铸态材料/动态再结晶/晶粒尺寸/驱动辊转速/有限元模拟Key words
casting-rolling composite forming of ring part/ as-cast material/ dynamic recrystallization/ grain size/ rotational speed of driving roll/ FE simulation分类
矿业与冶金引用本文复制引用
郭良刚,潘霞,杨合,李永堂,谷瑞杰..驱动辊转速对铸态42CrMo钢环件热辗轧微观组织的影响规律[J].重型机械,2012,(3):59-64,6.基金项目
国家自然科学基金重点项目(51135007) （51135007）
国家自然科学基金面上项目(51175427,50805120) （51175427,50805120）
金属挤压与锻造装备技术国家重点实验室(中国重型机械研究院有限公司)开放基金(2011MEFETKF_03) （中国重型机械研究院有限公司）
