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以BFe10-1-1铜合金为研究对象,分别在850、900、950℃下,应变速率为0.01、0.1、1、10 s-1,真应变0.8的热压缩参数条件下,采用Gleeble-3500试验机完成热压缩试验,获得该合金的真应力-真应变曲线。结果表明,该合金在850、900℃成形时,对成形速度较敏感,即随应变速率的降低,流变应力随着减小;当温度在950℃时,合金的成形速度敏感性较差。在应变速率为0.01、0.1 s-1时,合金的流变应力随应变速率的提高而增大的效果不明显;在应变速率为1、10 s-1时,合金的流变应力基本不随应变速率的增大而提高。求得热变形激活能,并构建了该合金修正型的Arrhenius本构方程。
With BFe10-1-1 copper alloy as the research object, under the condition of compressive strain of 850, 900 and 950 ℃, strain rate of 0.01, 0.1, 1, 10s-1 and true strain of 0.8, Gleeble-3500 Tester to complete the hot compression test to obtain the true stress-true strain curve of the alloy. The results show that the alloy is sensitive to the forming speed at 850 and 900 ℃, and the flow stress decreases with the decrease of strain rate. When the temperature is 950 ℃, the forming speed of the alloy is poor. At strain rates of 0.01 and 0.1 s-1, the flow stress of the alloy increases little with the increase of the strain rate. At the strain rate of 1, 10 s-1, the flow stress of the alloy does not change with the strain Increase the rate of increase. The thermal deformation activation energy was obtained and the Arrhenius constitutive equation of the alloy was constructed.