锻压技术

基于Ti-6Al-4V的热等静压与温压成形数值模拟对比研究

英文标题：Comparison of numerical simulation between hot isostatic pressing and warm compaction on Ti-6Al-4V

作者：姚松郎利辉布国亮张东星王刚

单位：北京航空航天大学

关键词：钛合金热等静压温压数值模拟

分类号：TG394

出版年,卷(期):页码：2013,38(3):156-160

摘要：

为对比研究钛合金的热等静压和温压成形工艺特点，以典型圆柱件成形为例，采用MSC.MARC软件，选取了Shima模型嵌入Ti-6Al-4V材料模型进行数值模拟。通过分析两种工艺过程中粉末体的流动情况和致密度分布，得出粉末体的热等静压是一个先向外膨胀再向中心收缩，最终达到全致密的过程，致密度分布均匀；而温压成形是沿着冲头方向直接进行收缩，致密度不高并存在明显的梯度现象。通过两种成形特点的对比，能分别预测成形方法的变形以及指导两种成形方法的选取。

Taking the processing of a typical cylindrical part as a sample, the forming characteristics during the process of hot isostatic pressing (HIP) and warm compaction about titanium powder material were investigated. Shima model of MSC. MARC software was used to simulate the two different processes, in which the material model of Ti-6Al-4V was inserted. By analyzing the movement and density distribution of the powder with two different methods, it is concluded that HIP's process can be divided into several main steps: first expansion, then followed by striction, and finally densification with uniform distribution. By comparison, in terms of warm compaction, powder material shrinks in the direction of the punch, resulting in an obvious phenomenon of gradients, therefore densification could be unrealizable at average pressure. Through analyzing the forming characteristics during these two techniques comparatively, the powder deformation mechanism during the forming process can be predicted accurately, and it will be helpful to make an option on a suitable forming method.

基金项目：

国家科技重大专项资助项目（2009ZX04005-41）

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