▎ 摘　　要

NOVELTY - Preparing worm wheel and worm comprises: (i) melting low-carbon steel into hot melt, and introducing hot melt into mold to make rough blank of worm wheel and worm; (ii) forging obtained rough blank, and multi-stage cooling with composite coolant during forging process, and washing with clean water to obtain metal main body; (iii) uniformly mixing graphene, aluminum-doped zinc oxide powder and phenolic resin conductive adhesive powder, and forming buffer layer on obtained metal main body through extrusion molding; (iv) multi-stage cooling obtained buffer layer with composite coolant, drying cooled buffer layer, placing metal main body with buffer layer in hot melt adhesive solution, allowing to stand, taking-out metal main body, and electric arc spraying diamond powder and molybdenum disulfide powder on metal main body with buffer layer to obtain surface coating; and (v) placing obtained surface coating in flowing water, and polishing surface to obtain worm wheel and worm. USE - The method is useful for preparing worm wheel and worm, which is useful for heavy-load vehicle main reducing system. ADVANTAGE - The method enables preparation of worm wheel and worm with high performance. DETAILED DESCRIPTION - Preparing worm wheel and worm comprises: (i) melting low-carbon steel into hot melt, and introducing hot melt into mold to make rough blank of worm wheel and worm; (ii) forging obtained rough blank, and multi-stage cooling with composite coolant during forging process, and washing with clean water to obtain metal main body; (iii) uniformly mixing graphene, aluminum-doped zinc oxide powder and phenolic resin conductive adhesive powder, and forming buffer layer on obtained metal main body through extrusion molding; (iv) multi-stage cooling obtained buffer layer with composite coolant, drying cooled buffer layer, placing metal main body with buffer layer in hot melt adhesive solution, allowing to stand, taking-out metal main body, and electric arc spraying diamond powder and molybdenum disulfide powder on metal main body with buffer layer to obtain surface coating; and (v) placing obtained surface coating in flowing water, polishing surface to obtain worm wheel and worm, filtering and collecting falling powder of surface coating in flowing water, drying falling powder, and returning to electric arc spraying stage in step (iv).