Cementation involves placing parts made of low carbon steel or low carbon alloy steel into a carbon-rich active medium, heating to 850-950°C for several hours, allowing the carburizing medium to generate active carbon atoms on the surface of the parts. These are then absorbed and diffused into the surface layer through surface absorption, thereby increasing the carbon content of the surface layer to 0. The heat treatment process includes more than 8% hardening. After cementation, the workpiece is then hardened and tempered at low temperature to increase surface hardness, wear resistance, and fatigue strength, while maintaining a certain level of strength and good toughness in the core. This process represents the tempering of 1kg of steel, and it should be used in conjunction with production data for 1kg of steel. The data was compiled from the production of adjusted spherical roller bearings, cylindrical roller bearings, double row angular contact ball bearings, and tapered roller bearings.