(1. 湖北汽車工業(yè)學(xué)院 材料工程系，十堰 442002；
2. 西北工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院 凝固技術(shù)國家重點(diǎn)實(shí)驗(yàn)室，西安 710072)
摘 要: 環(huán)件熱輾擴(kuò)成形問題是多場、多因素耦合作用下集三維連續(xù)漸變、非穩(wěn)態(tài)及非對(duì)稱等特點(diǎn)于一體的高度非線性問題，采用有限元建模仿真方法研究與發(fā)展該技術(shù)對(duì)實(shí)現(xiàn)無縫環(huán)形構(gòu)件的高質(zhì)量、低成本及短周期制造具有重要意義。分別從宏觀和微觀尺度評(píng)述環(huán)件熱輾擴(kuò)成形有限元建模仿真的國內(nèi)外研究現(xiàn)狀、存在的問題與發(fā)展趨勢，進(jìn)而指明其發(fā)展方向如下：大型、復(fù)雜環(huán)件徑、軸雙向熱輾擴(kuò)成形全過程自適應(yīng)建模的仿真方法與關(guān)鍵技術(shù)；環(huán)件熱輾擴(kuò)成形過程宏觀與微觀有限元建模仿真無縫集成技術(shù)；適用于以環(huán)件熱輾擴(kuò)為代表的連續(xù)局部塑性成形過程的材料本構(gòu)模型和組織演變模型以及相應(yīng)穩(wěn)健而高效的有限元算法、本構(gòu)積分算法與組織演變仿真方法；考慮模具的變形、傳熱及主要失效形式的環(huán)件熱輾擴(kuò)成形過程建模仿真技術(shù)。
關(guān)鍵字: 環(huán)件熱輾擴(kuò)；微觀組織；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
