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为实现Cu-Be-Co合金连续挤压的数值模拟和制定合理的热成形工艺参数,采用Gleeble-1500D热模拟机对Cu-Be-Co合金在变形温度为450℃~850℃和应变速率为0.1s-1~10s-1条件下的热变形行为进行研究;分析热压缩对合金组织的影响;根据Arrhenius方程对实验数据进行分析,建立Cu-Be-Co合金热变形本构方程。结果表明,Cu-Be-Co合金热变形的流变应力随应变速率的降低和变形温度的升高而减小,并且Cu-Be-Co合金在高温变形条件下发生动态再结晶。
In order to realize the numerical simulation of continuous extrusion of Cu-Be-Co alloy and to develop a reasonable thermoforming process parameters, the Gleeble-1500D thermal simulator was used to simulate the Cu-Be-Co alloy at a deformation temperature of 450 ℃ ~ 850 ℃ and a strain rate of 0.1s-1 ~ 10s-1 under the conditions of thermal deformation behavior of the study; analysis of the impact of hot compression on the alloy structure; Arrhenius equation experimental data were analyzed to establish Cu-Be-Co alloy thermal deformation constitutive equation. The results show that the flow stress of Cu-Be-Co alloy decreases with the decrease of strain rate and deformation temperature, and the dynamic recrystallization of Cu-Be-Co alloy occurs under high temperature deformation.