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 kJ/mol,同时利用逐步回归法建立了该合金的流变应力方程.
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