A combination of numerical simulations and experiments was used to study the influence of glass lubricant on the hot extrusion of Inconel 625 alloy. The results showed that the glass lubricant left a large amount of abrasive debris and furrows on alloy surface, which produced different friction states. The use of a lubricant changed the alloy microstructure, decreasing the grain size, the high-angle grain boundaries (HAGBs), and the dynamic recrystallization volume fraction of the sample with lubricant. The temperature increase due to deformation and friction heat significantly affected the stress, strain, and flow rate of the billet during extrusion. The uneven friction states generated excessive local frictional heat, making the billet prone to overheating and crack initiation. The frictional heat caused local grain size and stress differences in the billet, causing further expansion of cracks.

数值模拟和实验相结合，用于研究玻璃润滑剂对Inconel 625合金热挤压的影响。结果表明，玻璃润滑剂在合金表面残留大量磨屑和沟槽，产生不同的摩擦状态。润滑剂的使用改变了合金的微观结构，减小了晶粒尺寸，大角度晶界（HAGBs）以及带有润滑剂的样品的动态重结晶体积分数。由于变形和摩擦热引起的温度升高会显着影响挤压过程中坯料的应力，应变和流速。不均匀的摩擦状态会产生过多的局部摩擦热，从而使钢坯易于过热和产生裂纹。