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对Cu-Cr-Zr-Ag合金在Gleeble-1500D热模拟试验机上进行热压缩实验,对合金在应变速率为0.001~10 s-1、变形温度为650~950℃的高温变形过程中的流变应力行为、热变形过程中的组织演变和动态再结晶机制进行了研究。结果表明,流变应力随变形温度升高而减小,随应变速率提高而增大。Cu-Cr-Zr-Ag合金在热变形过程中的动态再结晶机制受变形温度和应变速率控制。当温度达到950℃,应变速率为0.001 s-1时,Cu-Cr-Zr-Ag合金发生完全的动态再结晶。该合金高温热压缩变形时的热变形激活能Q为343.23 k J/mol,同时利用逐步回归法建立了该合金的流变应力方程。
The hot compression tests of the Cu-Cr-Zr-Ag alloy on the Gleeble-1500D thermal simulator were carried out. The rheological behavior of the alloy during the high temperature deformation with the strain rate of 0.001-10 s-1 and the deformation temperature of 650-950 ℃ Stress behavior, microstructure evolution and dynamic recrystallization mechanism during hot deformation. The results show that the flow stress decreases with the increase of deformation temperature and increases with the increase of strain rate. The dynamic recrystallization mechanism of Cu-Cr-Zr-Ag alloy during hot deformation is controlled by deformation temperature and strain rate. When the temperature reaches 950 ℃ and the strain rate is 0.001 s-1, the complete dynamic recrystallization occurs in the Cu-Cr-Zr-Ag alloy. The hot deformation activation energy (Q) of the alloy during high temperature hot compression deformation is 343.23 kJ / mol, and the flow stress equation of the alloy is established by the stepwise regression method.