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采用Gleeble热模拟试验机,对锻态TB6钛合金在变形温度660~1050℃,应变速率0.001~0.1s-1的条件下进行等温恒应变速率压缩试验,研究了TB6钛合金的高温压缩变形行为。基于Prasad判据绘制了该合金的热加工图,结合变形微观显微组织分析,确定了该合金在(α+β)两相区至β相区的最佳工艺参数。结果表明:当应变速率0.01~0.1s-1,变形温度980℃时,其变形机制为动态回复,失稳现象不明显。最终确定了应变速率为0.001~0.1 s-1,变形温度为815℃左右,为该合金的最佳热加工工艺参数。
The isothermal constant strain rate compression test was carried out on the forged TB6 titanium alloy under the conditions of deformation temperature of 660 ~ 1050 ℃ and strain rate of 0.001 ~ 0.1s-1 by using Gleeble thermal simulation tester. The compression deformation behavior of TB6 titanium alloy at high temperature was studied. . Based on the Prasad criterion, the hot working diagram of the alloy was drawn and the optimum technological parameters of the alloy in the (α + β) two-phase region to the β-phase region were determined in combination with the deformation microstructure analysis. The results show that when the strain rate is 0.01 ~ 0.1s-1 and the deformation temperature is 980 ℃, the deformation mechanism is dynamic and the instability is not obvious. The final strain rate of 0.001 ~ 0.1 s-1, the deformation temperature of about 815 ℃, the best for the alloy thermal processing process parameters.