Abstract A short process of Inconel 625 alloy tube was developed to solve the problems of the traditional extrusion process, and particular attention was paid on the hot deformation behavior of the as-cast Inconel 625 alloy. The hot compression experiments were performed to study the hot deformation behavior of Inconel 625 in the temperature range of 900–1200 °C and strain rate range of 0.01–10.00 s −1 by Gleeble-3500. The hot compressed microstructure was examined to study the effects of temperature and strain rate on the microstructural characteristic by electron backscatter diffraction (EBSD). The results show that the processing maps were greatly influenced by the temperature rather than the strain rate. It is found that with the strain increasing, the instability zone gradually turned to the low-temperature and low strain rate area, while the range of high-temperature instability area shrank. The optimum condition of the as-cast Inconel 625 alloy was determined as high strain rate region (temperature of 1100–1200 °C, strain rate of 1.00–10.00 s −1 ) with the dissipation efficiency of above 0.28. As illustrated by microstructural characteristic of EBSD analysis, the perfect dynamic recrystallization occurred and fine grain structure was obtained under this deformation conditions. Graphic abstract The hot processing map and microstructure evolution of as-cast Inconel 625 alloy at various temperatures and strain rates.

中文翻译：

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Inconel 625合金铸态高温变形行为及加工图

摘要 针对传统挤压工艺存在的问题，开发了一种Inconel 625合金管短工艺，特别关注了Inconel 625合金铸态的热变形行为。通过 Gleeble-3500 进行热压缩实验以研究 Inconel 625 在 900–1200 °C 温度范围和 0.01–10.00 s -1 应变速率范围内的热变形行为。通过电子背散射衍射 (EBSD) 检查热压缩微观结构，以研究温度和应变速率对微观结构特征的影响。结果表明，加工图受温度而不是应变率的影响很大。发现随着应变的增加，不稳定区逐渐转向低温低应变率区，而高温不稳定区域的范围缩小。铸态 Inconel 625 合金的最佳条件被确定为高应变率区域（温度为 1100-1200 °C，应变率为 1.00-10.00 s -1 ），耗散效率在 0.28 以上。正如 EBSD 分析的显微组织特征所示，在这种变形条件下发生了完美的动态再结晶并获得了细晶粒结构。图形摘要 铸态 Inconel 625 合金在不同温度和应变率下的热加工图和微观结构演变。正如 EBSD 分析的显微组织特征所示，在这种变形条件下发生了完美的动态再结晶并获得了细晶粒结构。图形摘要 铸态 Inconel 625 合金在不同温度和应变率下的热加工图和微观结构演变。正如 EBSD 分析的显微组织特征所示，在这种变形条件下发生了完美的动态再结晶并获得了细晶粒结构。图形摘要 铸态 Inconel 625 合金在不同温度和应变率下的热加工图和微观结构演变。