(1. 湖北汽车工业学院 材料工程系，十堰 442002；
2. 西北工业大学 材料科学与工程学院 凝固技术国家重点实验室，西安 710072)
摘 要: 环件热辗扩成形问题是多场、多因素耦合作用下集三维连续渐变、非稳态及非对称等特点于一体的高度非线性问题，采用有限元建模仿真方法研究与发展该技术对实现无缝环形构件的高质量、低成本及短周期制造具有重要意义。分别从宏观和微观尺度评述环件热辗扩成形有限元建模仿真的国内外研究现状、存在的问题与发展趋势，进而指明其发展方向如下：大型、复杂环件径、轴双向热辗扩成形全过程自适应建模的仿真方法与关键技术；环件热辗扩成形过程宏观与微观有限元建模仿真无缝集成技术；适用于以环件热辗扩为代表的连续局部塑性成形过程的材料本构模型和组织演变模型以及相应稳健而高效的有限元算法、本构积分算法与组织演变仿真方法；考虑模具的变形、传热及主要失效形式的环件热辗扩成形过程建模仿真技术。
关键字: 环件热辗扩；微观组织；建模；仿真；有限元
simulation of hot ring rolling
（1. Department of Materials Science and Engineering,
Hubei University of Automotive Technology, Shiyan 442002, China;
2. State Key Laboratory of Solidification Processing, School of Materials Science and Engineering,
Northwestern Polytechnical University, Xi’an 710072, China）
Abstract:Hot ring rolling is a highly nonlinear problem under coupled effects of multi-fields and multi-factors, which is characterized by three-dimensional incremental deformation, unsteady state and asymmetry. The research and development of the technology using finite element (FE) modeling and simulation is of significance for manufacturing seamless ring-shaped components with high quality, low cost and short cycle. The current international level, remained problems and development trend of macro-scale and micro-scale FE modeling and simulation of hot ring rolling were reviewed, and the following prospects of important directions were presented as follows: adaptive modeling method and key technologies for the overall process of hot radial-axial rolling of large profiled rings; seamless integration of macro-scale and micro-scale FE modeling for hot ring rolling; the processes such as ring rolling, and relevant FE algorithm, constitutive integration algorithm and microstructure evolution simulation method; hot ring rolling simulation accounting for deformation, heat transfer and major failure modes of dies.
Key words: hot ring rolling; microstructure; modeling; simulation; finite element
