High-temperature bearing steel and cleaning and homogenizing preparation method thereof

The invention discloses high-temperature bearing steel and a cleaning and homogenizing preparation method thereof, and belongs to the technical field of alloy steel. The high-temperature bearing steel comprises the following chemical components in percentage by mass: 0.80-0.85% of C, less than or equal to 0.35% of Mn, less than or equal to 0.25% of Si, 4.00-4.25% of Cr, 4.00-4.50% of Mo, 0.90-1.10% of V, less than or equal to 0.15% of Ni, less than or equal to 0.25% of W, less than or equal to 0.040% of Nb, less than or equal to 0.010% of Al, less than or equal to 0.001% of Ca, less than or equal to 0.0040% of Ti, less than or equal to 0.0007% of O, less than or equal to 0.0020% of N, less than or equal to 0.001% of H and the balance of Fe and inevitable impurities. The process comprises the steps of raw material preparation, electrode bar pouring in a vacuum induction furnace, air cooling, polishing, vacuum consumable remelting, steel ingot annealing and polishing, forging, rolling and material forming and annealing. The high-temperature bearing steel has the beneficial effects of high strength, high hardness, wear resistance, high rotation bending fatigue ultimate strength, excellent fatigue performance and good dimensional stability at room temperature and 300 DEG C.