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通过Gleebe试验机对Cu-Cr0.44-Sn0.34-Zn0.2-Ce0.01合金进行单道次高温等温压缩试验,得出实验合金的应力应变数据。变形条件是应变速率0.01,0.1,1和5 s-1,变形温度600,700和800℃,最大变形程度为真实应变0.6。通过对数据的计算,得到加工硬化率-应变曲线、动态再结晶临界应力、动态再结晶临界应变。通过微观组织分析了该合金的连续动态再结晶特征。最后分析临界应力应变与变形条件的关系。结果表明,对于没有明显应力峰值的应力应变曲线,使用加工硬化率方法是研究热变形过程中动态再结晶临界应变的一种有效方法。
The single-pass high temperature isothermal compression test of Cu-Cr0.44-Sn0.34-Zn0.2-Ce0.01 alloy was carried out by Gleebe test machine to get the stress-strain data of the experimental alloy. Deformation conditions are strain rates of 0.01, 0.1, 1 and 5 s-1, deformation temperatures of 600, 700 and 800 ° C and maximum deformations of 0.6. By calculating the data, the work hardening rate - strain curve, dynamic recrystallization critical stress, dynamic recrystallization critical strain are obtained. The continuous dynamic recrystallization characteristics of the alloy were analyzed by microstructure. Finally, the relationship between critical stress and strain and deformation conditions is analyzed. The results show that for the stress-strain curve without obvious stress peaks, the work hardening rate method is an effective method to study the critical strain of dynamic recrystallization during hot deformation.