The apparent activation energy for deformation (Q) and strain rate sensitivity (m) of GH4586 superalloy are calculated and the variation trend is reasonably explained by the microstructure observations. Constitutive modelling of this superalloy is established and the processing maps at different strains are constructed. The results show that the Q value is in the range of 751.22–878.29 kJ/mol. At a temperature of 1060 °C, strain rate of 0.001 s⁻¹, and strain of 0.65, the m value of GH4586 superalloy reaches a maximum of 0.42. The optimal processing parameter of GH4586 superalloy is at a deformation temperature of 1050 °C and a strain rate of 0.001 s⁻¹. The domains of flow instability notably expand with increasing strain during high temperature deformation of GH4586 superalloy.

计算了GH4586高温合金的表观活化能（Q）和应变速率敏感性（m），并通过显微组织观察合理地解释了其变化趋势。建立了该超级合金的本构模型，并构建了不同应变下的加工图。结果表明，Q值在751.22–878.29 kJ / mol的范围内。在1060°C的温度，0.001 s ^-1的应变速率和0.65的应变下，GH4586高温合金的m值达到最大值0.42。GH4586高温合金的最佳加工参数是在1050°C的变形温度和0.001 s ^-1的应变速率下。在GH4586高温合金高温变形过程中，流动不稳定性的域随着应变的增加而显着扩展。