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采用高温热压缩试验研究了铸态Cu-Cr-Zr合金在温度880~970℃、应变速率0.1~10 s-1范围内的热变形行为和组织演变。结果表明:低应变速率下该合金高温压缩流变曲线具有多峰曲线特征,流变应力先快速上升到一个平台,然后又继续上升。该合金的热变形激活能为339 k J/mol,合金的热变形主要受扩散所控制。高温热变形过程中Cu-Cr-Zr合金发生了二次再结晶,低应变速率或高变形温度有利于二次再结晶的发生。
The hot deformation behavior and microstructure evolution of as-cast Cu-Cr-Zr alloy at temperature of 880 ~ 970 ℃ and strain rate of 0.1 ~ 10 s-1 were investigated by high temperature hot compression test. The results show that the rheological curve of high temperature compression has a multi-peak curve at low strain rate, and the flow stress rapidly rises to a plateau and then continues to rise. The hot deformation activation energy of the alloy is 339 kJ / mol. The thermal deformation of the alloy is mainly controlled by diffusion. Secondary recrystallization of Cu-Cr-Zr alloy occurs during high temperature hot deformation, and low strain rate or high deformation temperature is beneficial to secondary recrystallization.