基于组织均匀性目标的TC4合金盘形件等温成形工艺优化

采用有限元数值模拟虚拟试验方法，以终锻件组织均匀性为目标，研究了TC4合金盘形件等温成形过程，为锻造工艺参数的优化提供了一条从虚拟试验—回归模型—优化设计的新思路。根据锻造工艺参数与组织均匀性之间的关系，结合建立的回归模型，采用单纯形优化算法对TC4合金盘形件等温锻造成形工艺参数进行了优化。采用优化后的工艺参数模拟了等温锻造成形过程，结果表明，锻后组织分布均匀，优化效果显著。

Optimization Design Based on Microstructure Uniformity in Isothermal Forging Processes for Titanium Alloy

Taking the final forging microstructure uniformity as optimum objective, the disk isothermal forming process of TC4 alloy is analyzed with combining the virtual experiment and FEM numerical simulation, then the relation between the effective factors of isothermal forging and the function of microstructure uniformity is obtained. Based on the virtual experiment results and FEM numerical simulation, technological parameters of TC4 alloy are optimized by regressive model and simplex method - a kind of optimizing algorithm. Optimizing results indicate that optimizing effect is obvious, and then the results supply a new optimizing viewpoint including virtual experiments, regression model and optimum design for technological parameters of TC4 alloy in isothermal forming process.