Integral thermal treatment process for roller shell of high-pressure roller mill

The invention discloses an integral thermal treatment process for a roller shell of a high-pressure roller mill. The method comprises the following specific steps of: leaving allowances for the outer circle diameter, inner hole diameter and each end face of a roller shell workpiece; putting an equal-height sleeve into the roller shell, compacting between the inner hole of the roller shell and thesleeve as well as the inner hole of the sleeve with heat-preserving cotton, and arranging an upper cover plate and a lower cover plate on the upper end face and lower end face of the roller shell; putting the sleeve workpiece into a thermal treatment furnace through a hanger, and performing normalizing treatment; quenching; putting into water for cooling; charging in time after cooling, and tempering; and tempering, preserving heat, discharging, and cooling in the air. In the thermal treatment process, the process requirements of high hardness and wear resistance on the surface of the roller shell of the high-pressure roller mill as well as toughness of a core part can be met by only using the conventional thermal treatment equipment.