Cu-0.8Fe合金的热变形行为及组织演变

doi:10.13251/j.issn.0254-6051.2025.11.003

摘要/Abstract

摘要： 采用ZG-0.01型真空中频感应炉制备了Cu-0.8Fe合金,并通过Gleeble-1500D热模拟试验机对Cu-0.8Fe合金进行了等温热变形试验(应变速率为0.003~10 s^-1,变形温度为600~950 ℃)。在此基础上,绘制了合金的真应力-真应变曲线,构建了本构方程和热加工图,分析了合金在不同变形条件下的显微组织演变规律。结果表明:Cu-0.8Fe合金的热变形激活能为379.158 kJ/mol,相比纯Cu提高了24.8%;合金的最佳热加工参数为:应变速率0.018~0.449 s^-1、变形温度775~950 ℃;提高热变形温度或者降低应变速率均有利于该合金发生动态再结晶。TEM分析表明,该合金热变形过程中的主要析出相为α-Fe相。

关键词: Cu-0.8Fe合金, 本构方程, 热加工图, 显微组织

Abstract: Cu-0.8Fe alloy was prepared by using ZG-0.01 vacuum medium frequency induction furnace, and an isothermal hot deformation test of Cu-0.8Fe alloy was carried out by means of Gleeble-1500D thermal simulation testing machine with strain rate of 0.003-10 s^-1 at deformation temperature between 600-950 ℃. The true stress-true strain curves of the alloy were plotted, the constitutive equations and hot processing maps were constructed, and the microstructural evolution laws of the alloy at different deformation conditions were investigated. The results show that the hot deformation activation energy of Cu-0.8Fe alloy is 379.158 kJ/mol, which is 24.8% higher compared to pure Cu. The optimum hot processing parameters of the alloy are range from 0.018 s^-1 to 0.449 s^-1 for strain rate and 775 ℃ to 950 ℃ for deformation temperature. The increase in the deformation temperature or the decrease in the strain rate is favorable for dynamic recrystallization to occur. TEM analysis shows that the main precipitated phase is the α-Fe phase during hot deformation.

Key words: Cu-0.8Fe alloy, constitutive equation, hot processing map, microstructure

中图分类号:

TG146.1

贺文浩, 周孟, 田保红, 景柯. Cu-0.8Fe合金的热变形行为及组织演变[J]. 金属热处理, 2025, 50(11): 16-23.

He Wenhao, Zhou Meng, Tian Baohong, Jing Ke. Hot deformation behavior and microstructure evolution of Cu-0.8Fe alloy[J]. Heat Treatment of Metals, 2025, 50(11): 16-23.

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