<p>Powder metallurgy (PM) superalloys, due to their excellent comprehensive performance, have become crucial materials for critical components such as aero-engine turbine disks. However, they are also typical difficult-to-cut materials. Grinding is one of the primary machining methods for superalloys, yet current research on grinding performance under high abrasive wheel speed and high workpiece infeed speed remains insufficient. Therefore, this study conducted high-speed grinding experiments on FGH96 and GH4169 using electroplated CBN wheels, comparing their grinding performance. Notably, the relationships between specific grinding energy, heat flux, and grinding temperature were elucidated through sensitivity analysis. Compared to FGH96, GH4169 exhibits increases of approximately 17% in normal grinding force, 15% in tangential grinding force, and 24% in grinding temperature. Conversely, the surface roughness of FGH96 is worse, which is mainly attributed to its low thermal conductivity and high-temperature strength. It was also observed that specific grinding energy and heat flux decrease with increasing depth of cut, indicating negative sensitivity, whereas grinding temperature shows a positive sensitivity, increasing as the depth of cut increases. This may be due to the increased depth of cut leading to a higher proportion of energy transferred into the workpiece. This study provides technical references for optimizing the grinding process of FGH96 superalloys.</p>