Inconel 617合金高温热变形行为与组织演变

High-Temperature Thermal Deformation Behavior and Microstructural Evolution of Inconel 617 Alloy

为解决Inconel 617合金的高温加工问题,对锻造Inconel 617合金的高温热变形行为进行了研究。利用Gleeble-3500热模拟试验机研究了Inconel 617合金在900~1200℃、应变速率为0.001~10 s^(-1)范围内的热塑性行为。推导了该温度和应变速率下的本构方程,得到了该温度范围内的热加工图。用电子背散射衍射研究了合金压缩后的动态再结晶。确定了失稳区的位置,并表明在热变形条件下,确实发生了动态再结晶,获得了细小的晶粒。Inconel 617热处理的最佳温度范围为1075~1175℃,该温度范围处于材料的安全区。

To solve the problems of processing Inconel 617 alloy at high temperatures, the hot deformation behavior of forged Inconel 617 at high temperature was studied. A Gleeble-3500 instrument was used to analyze the thermoplastic behavior in the temperature range of 900~1200 ℃ and strain rate range of 0.001~10 s^(-1). The constitutive equation in this temperature and strain rate range was deduced, and the thermal processing map was obtained. The dynamic recrystallization after compression was studied by electron backscatter diffraction. The location of the instability zone was determined. Results show that under the conditions of thermal deformation, dynamic recrystallization occurs, and fine grains are obtained. The optimal temperature range for Inconel 617 thermal processing is identified as 1075~1175 ℃, and this temperature range is in the stable zone for the material.