李昌民,黄亮,赵明杰,等.Ti-6Cr-5Mo-5V-4Al合金热加工性能研究[J].精密成形工程,2022,14(4):20-27.
LI Chang-min,HUANG Liang,ZHAO Ming-jie,et al.Hot Workability of Ti-6Cr-5Mo-5V-4Al Alloy[J].Journal of Netshape Forming Engineering,2022,14(4):20-27. |
| Ti-6Cr-5Mo-5V-4Al合金热加工性能研究 |
| Hot Workability of Ti-6Cr-5Mo-5V-4Al Alloy |
| 投稿时间：2022-03-01 |
| DOI：10.3969/j.issn.1674-6457.2022.04.003 |
| 中文关键词: Ti-6Cr-5Mo-5V-4Al合金 应变速率敏感系数 温度敏感系数 微观组织 |
| 英文关键词: Ti-6Cr-5Mo-5V-4Al alloy strain rate sensitivity coefficient temperature sensitivity coefficient microstructure |
| 基金项目:哈尔滨工业大学金属精密热加工国防科技重点实验室基金(6142909190207);陕西省高性能精确成形技术与装备重点实验室基金开放课题(PETE-2019-KF01) |
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| 中文摘要: |
| 目的 基于应变速率敏感系数、温度敏感系数，研究Ti-6Cr-5Mo-5V-4Al(Ti-6554)合金的热加工性能。方法 通过Gleeble-3500热模拟实验机，在温度为953~1 043 K、应变速率为0.001~10 s−1时，对Ti-6Cr-5Mo-5V-4Al合金进行高温压缩实验。建立不同应变下的应变速率敏感系数图、温度敏感系数图，分析不同变形条件下的微观组织。结果 随着应变速率的增加，应变速率敏感系数逐渐下降，而低温度敏感系数区域主要集中在低应变速率区域。基于微观组织表征，发现变形过程中存在明显的动态相变和动态再结晶过程。结论 确定Ti-6554合金的合理加工条件为953~964 K、0.001 s−1和1 037~1 043 K、0.001 s−1。 |
| 英文摘要: |
| The work aims to study the hot workability of Ti-6Cr-5Mo-5V-4Al (Ti-6554) alloy based on strain rate sensitivity coefficient and temperature sensitivity coefficient. The high temperature compression experiments of Ti-6Cr-5Mo-5V-4Al alloy were carried out with Gleeble-3500 thermal simulation machine at the temperature of 953~1 043 K and the strain rate of 0.001~10 s−1. The strain rate sensitivity coefficient map and temperature sensitivity coefficient map under different strains were established, and the microstructure under different deformation conditions was analyzed. The strain rate sensitivity coefficient decreased gradually with the increase of strain rate, while the low temperature sensitivity coefficient was mainly concentrated in the low strain rate region. Based on the microstructure characterization, obvious dynamic transformation and dynamic recrystallization processes were found during the deformation process. The optimum processing conditions of Ti-6554 alloy are determined to be the deformation temperature of 953~964 K and 1 037~1 043 K and the strain rate of 0.001 s−1. |
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