在Gleeble-1500热/力模拟机上对Zr-4合金进行了热压缩试验,研究了其在温度750℃～950℃和应变速率0.005s-1～50 s-1条件下的热变形行为.结果表明:热变形过程的流变应力可用双曲正弦本构关系来描述,平均激活能为377.79kJ/mol.根据材料动态模型,计算并分析了zr-4合金的加工图.利用加工图确定了热变形的流变失稳区,并且获得了试验参数范围内的热变形过程的最佳工艺参数,其热加工温度930℃～950℃,应变速率为0.05 s-1～0.8 s-1和10 s-1～30 s-1的2个区域.
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