摘要
The hot deformation behavior of a novel imitation-gold copper alloy was investigated with Gleeble-1500 thermo-mechanical simulator in the temperature range of 650-770 °C and strain rate range of 0.001-1.0 s-1. The hot deformation constitutive equation was established and the thermal activation energy was obtained to be 249.60 kJ/mol. The processing map at a strain of 1.2 was developed. And there are two optimal regions in processing map, namely 650-680 °C, 0.001-0.01 s-1 and 740-770 °C, 0.01-0.1 s-1. Optical microscopy was employed to investigate the microstructure evolution of the alloy in the process of deformation. Recrystallized grains and twin crystals were found in microstructures of the hot deformed alloy.
在Gleeble-1500热模拟机上,采用等温热压缩实验,研究一种新型的仿金铜合金在变形温度650~770°C、变形速率0.001~1s-1条件下的热加工行为。通过建立热加工本构方程得出热激活能为249.60kJ/mol。通过建立合金在真应变1.2下的加工图,得出650~680°C、0.001~0.01s-1和740~770°C、0.01~0.1s-1是合金热加工的最佳工艺条件。通过金相显微镜观察合金在热压缩过程中的组织变化、再结晶组织和孪晶组织。
基金
Project(11JJ2025)supported by Natural Science Foundation of Hunan Province,China
Project(y2010-01-004)supported by the Nonferrous Metals Science Foundation of HNG-CSU,China
