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利用Gleeble-1500型热力模拟机,研究镍铝青铜合金在变形温度800～950℃、应变速率0.002～5 s-1时的热变形行为。根据热压缩试验数据,绘制了不同变形条件下的镍铝青铜合金真应力-真应变曲线,通过线性回归建立了镍铝青铜合金热变形本构方程。结果表明,流变应力随变形温度的升高而降低,随应变速率的提高而增大;计算得出的平均变形激活能为313.03 kJ/mol。
The thermal deformation behavior of nickel-aluminum-bronze alloy at deformation temperature of 800 ~ 950 ℃ and strain rate of 0.002 ~ 5 s-1 was studied by using Gleeble-1500 thermal simulator. According to the data of hot compression test, the true stress-true strain curves of nickel-aluminum-bronze alloy under different deformation conditions were plotted, and the thermal deformation constitutive equation of nickel-aluminum bronze alloy was established by linear regression. The results show that the flow stress decreases with the increase of deformation temperature and increases with the increase of strain rate. The calculated average deformation activation energy is 313.03 kJ / mol.