摘要
金属在热成形过程中的微观组织演变是影响产品力学性能的关键因素,该演变过程取决于温度、应变和应变速率。本文基于有限变形理论和微观组织演变的数学模型,建立了能够模拟变形过程、温度变化过程和微观组织演变过程的有限元法,研制了通用的三维有限元计算软件,并在H型钢三维热轧模拟方面进行了深入开发,给出了原材料为C-Mn钢的H型钢热轧过程综合模拟结果。综合对比了8组不同工艺下的热轧实验结果和计算机模拟结果,二者均吻合良好,表明本文方法能够较好地预报金属热成形过程。
The microstructure evolution, which is governed by temperature, strain and strain rate during hot metal forming, is a key factor to the mechanical properties. Based on the finite deformation theory and a microstructure model, the paper establishes a finite element method to simulate the deformation process, temperature variation and microstructure evolution. A 3-D finite element software for general use is developed. The simulation of hot rolling process of H-beam is especially studied. As an example, the simulation results of a C-Mn steel H-beam undergoing hot rolling are comprehensively displayed. 8-groups of experimental data under different hot rolling schedules are compared with numerical simulation results. Satisfactory agreement is reached between numerical predictions and experimental data, indicating that the present method is capable of predicting the hot metal forming with good accuracy.
出处
《工程力学》
EI
CSCD
北大核心
2002年第1期42-46,共5页
Engineering Mechanics
基金
教育部博士点专项基金(98021603)
河北省自然科学基金(500216)
