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为了获得BFe10-1-2白铜合金的合理热变形工艺参数,通过热模拟压缩试验对该合金的高温变形行为进行了研究。试验温度为1023~1273 K,应变速率为0.001~10 s-1。通过流变曲线分析、动力学分析及加工图对BFe10-1-2白铜合金的高温变形行为进行了表征,计算出BFe10-1-2白铜合金在热压缩变形过程中的激活能为425.299 k J/mol。通过Zener-Holloman参数以及真应变建立了BFe10-1-2白铜合金的本构方程用以描述该合金的高温流动应力。对计算的流动应力值与试验值进行了对比,结果表明:本构方程可以准确描述该合金的高温流动行为。此外,基于动态模型,建立了BFe10-1-2白铜合金的热加工图,并通过宏观及微观组织分析对加工图的准确性进行了验证。
In order to obtain reasonable thermal deformation process parameters of BFe10-1-2 white copper alloy, the high temperature deformation behavior of the alloy was studied by thermal simulation compression test. The experimental temperature is 1023 ~ 1273 K and the strain rate is 0.001 ~ 10 s-1. The high temperature deformation behavior of BFe10-1-2 white copper alloy was characterized by rheological curve analysis, dynamic analysis and machining drawing. The activation energy of BFe10-1-2 white copper alloy during hot compression deformation was calculated to be 425.299 kJ / mol. The constitutive equation of BFe10-1-2 white copper alloy was established by Zener-Holloman parameters and true strain to describe the high temperature flow stress of this alloy. Comparing the calculated values of the flow stress with the experimental values, the results show that the constitutive equation can accurately describe the high temperature flow behavior of the alloy. In addition, the thermal processing diagram of BFe10-1-2 white copper alloy was established based on the dynamic model, and the processing accuracy was verified by macroscopic and microstructure analysis.