锻压技术

Ti6Al4V钛合金盒形件热拉深成形

英文标题：Hot drawing on Ti6Al4V titanium alloy box-shaped parts

单位：1.贵州永红航空机械有限责任公司 2.苏州伍玥航空科技有限公司 3.清华大学机械工程系 4.空装成都局驻贵阳地区第三军代室

分类号：TG306

出版年,卷(期):页码：2023,48(12):87-93

摘要：

在分析Ti6Al4V钛合金板料热成形性能的影响因素的基础上，通过有限元仿真指导钛合金板的实际热成形零件工艺开发。首先,在钛合金板热单拉实验的基础上，总结温度和平均应变速率对Ti6Al4V钛合金的流动应力、成形极限及板厚方向性系数的影响。然后，根据盒形件的几何特征，通过有限元仿真，分析了影响盒形件成形的3个因素，即成形温度、平均应变速率和板料方向，并获取最佳成形参数。最后，参考仿真得到的最佳成形参数，并根据实际成形效果进行微调，完成了盒形件的拉深成形。零件最终成形效果及零件减薄率与有限元仿真结果基本一致，证明有限元仿真能较准确地反映零件的实际成形状态，对确定盒形件热拉深的合理工艺条件具有显著的指导意义。

Based on the analysis of the factors affecting the hot forming performance of Ti6Al4V titanium alloy sheet, the process development of actual hot forming parts was guided by finite element simulation. Firstly, based on the hot uniaxial tensile experiment, the influences of temperature and average strain rate on flow stress, forming limit and thickness directivity coefficient of Ti6Al4V titanium alloy sheet were summarized. Then, according to the geometrical characteristics of box-shaped parts, the three factors affecting the forming of box-shaped parts, namely, forming temperature, average strain rate and sheet direction, were analyzed by finite element simulation, and the optimal forming parameters were obtained. Finally, referring to the optimal forming parameters obtained by the simulation, the fine-turning was conducted according to the actual forming effect, and the deep drawing of box-shaped part was completed. The results show that the final forming effect and the thinning rate of part are basically consistent with the results of finite element simulation, which proves that the finite element simulation can reflect the actual forming state of part accurately. Thus, it is significant to determine the reasonable process conditions for the hot drawing of box-shaped parts.

基金项目：

作者简介：郭文平（1987-）,男，学士，高级工程师 E-mail：442623900@qq.com 通信作者：施立军（1988-）,男，博士研究生，高级工程师 E-mail：sit0202@163.com

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