刘钢,武永,王建珑,等.钛合金管件高压气胀成形工艺研究进展[J].精密成形工程,2016,8(5):35-40.
LIU Gang,WU Yong,WANG Jian-long,et al.Research Progress of High Pressure Gas Forming for Titanium Alloy Tubular Components[J].Journal of Netshape Forming Engineering,2016,8(5):35-40. |
| 钛合金管件高压气胀成形工艺研究进展 |
| Research Progress of High Pressure Gas Forming for Titanium Alloy Tubular Components |
| 投稿时间：2016-07-15 修订日期：2016-09-10 |
| DOI：10.3969/j.issn.1674-6457.2016.05.005 |
| 中文关键词: 高压气胀成形 钛合金管件 加载路径 壁厚控制 |
| 英文关键词: high pressure gas forming Ti-alloy tubular components loading path thickness controlling |
| 基金项目:教育部长江学者和创新团队发展计划（IRT1229） |
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| 中文摘要: |
| 高压气胀成形是在内高压成形基础上发展起来的管件成形技术，采用气体介质加载，可在高温下成形钛合金构件。以Ti-3Al-2.5V钛合金管材为实验材料，开展了矩形截面构件和大截面差构件高压气胀成形工艺研究，提出了气压阶梯加载方法和气压与轴向位移匹配的加载方法。结果表明，利用Ti-3Al-2.5V钛合金在一定温度和应变速率范围的应变和应变速率双硬化机制，采用合理的加载路径，能够消除开裂缺陷，以较高的效率实现钛合金异形管件的成形制造，并且构件壁厚相对均匀，形状和组织性能均可得到有效控制。 |
| 英文摘要: |
| High pressure hot gas forming is a tubular components forming technology, which is developed from tube hydroforming. The complex Ti-alloy tubular components can be produced at elevated temperature using internal high pressure gas. In this paper, the high pressure gas forming of the Ti-3Al-2.5V square cross section and components with large diameter variation were introduced in details. The stepped gas loading path and the loading path with match of internal gas pressure/axial feeding were proposed for the two kind of components, respectively. The results show that the strain and strain rate hardening mechanism exist in the Ti-3Al-2.5V alloy in a certain range of temperature and strain rate. By controlling the loading paths, the crack defects can be avoided and the Ti-alloy complex tubular components with relatively thickness distribution can be produced with high efficiency. Meanwhile, the dimensional accuracy, microstructure and the mechanical properties of the tubular components can also be controlled. |
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