摘要
材料在半固态下具有特殊性质,运用有限元数值模拟技术,研究材料在半固态成形过程中的应力场、应变场和温度场的分布规律,预测金属在成形过程中的充型行为、可能产生的缺陷和最佳工艺参数等信息,可为实际生产提供理论依据。对半固态2017铝合金的反挤压过程进行了数值模拟,研究了变形温度、凸模速度、凸模压下量、挤压比和摩擦因子等工艺参数对变形过程中应力、应变和温升的影响,并优化了变形工艺参数。
It is important to study deformation behavior, deformation mechanism and microstructure evolution for the special properties of semi-solid alloys. It will be beneficial to realize the distribution of stress, strain and temperature fields during the semi-solid backward extrusion on the basis of FEM technology. To predict whether defects occur or not and optimize the process parameters could provide scientific foundation of metal forming. In this paper, FE simulation of 2017 alloy during the semi-solid backward extrusion has been carried out. Effect of the process parameters, including deformation temperature, punch velocity, height reduction, extrusion ratio and shear factor of friction on the equivalent stress, the equivalent strain and the temperature raise during the semi-solid backward extrusion has been studied.
出处
《江苏理工学院学报》
2008年第1期21-27,共7页
Journal of Jiangsu University of Technology
