Ti-1300合金锻造加工的热压缩模拟

Forging Simulation of Ti-1300 Alloy by Hot Compressing Testing

摘要:

采用Gleeble-1500热模拟机对Ti-1300近β钛合金进行热压缩变形，研究其在温度为800~1010 ℃、应变速率为0.01~10 s-1、最大变形量为60%条件下的热变形行为。对热变形后的组织进行分析可知，在低应变速率下，主要发生动态再结晶；在高应变速率下，主要发生动态回复。根据试验数据得出了该合金的加工图，结果表明，Ti-1300合金在高应变速率下变形容易发生流变失稳现象，因此其锻造工艺应宜在较低的变形速率下进行，可得较细小的等轴动态再结晶组织

Abstract:

With Gleeble-1500 heat simulator performing heat compressive deformation on Ti-1300 near β alloy, its heat deformation behavior is researched with the temperature range of 800~1010 ℃, strain rate of 0.01~10 s-1 and maximum deformation of 60%. The structure analysis after heat deformation indicates that re-crystallization primarily occurs under the condition of low rate of strain, but dynamic recovery under the condition of high rate of strain. According to the test data, the manufacturing drawing of this alloy is obtained. The result indicates that for Ti-1300 alloy, rheological phenomenon easily occurs under the condition of high rate of strain which leads its unstableness. Therefore, its forging procedure should be performed under relative low rate of strain, thus relative fine structure of equal axial dynamic re-crystal could be obtained