▎ 摘　　要

NOVELTY - Preparation of bearing alloy blank involves soaking graphene in zinc chloride aqueous solution for more than 12 hours, filtering, calcining at 500-550 degrees C for more than 1 hour to obtain activated graphene where amount of zinc chloride in zinc chloride aqueous solution is 10-40 %mass, mixing activated graphene with mixed solution to obtain nickel sulfate-coated graphene, reacting nickel sulfate-coated graphene and sodium hypophosphite aqueous solution under ultrasonic vibration conditions to obtain nickel-doped graphene and mixing nickel-doped graphene with lead-free copper alloy. The mixed solution is aqueous solution containing nickel sulfate and sodium lauryl sulfate. USE - Preparation of bearing alloy blank for bearing alloy used for preparing bearing material e.g. sliding bearing material and bearing bush for heavy-duty engine (all claimed). ADVANTAGE - The preparation method of bearing alloy blank improves interface bonding strength of graphene and lead-free copper alloy, antifriction performance and wear resistance of product. The preparation method of bearing alloy blank, bearing alloy and bearing material is easy, economical and suitable for industrial production. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) bearing alloy, which is prepared by using bearing alloy blank as raw material; (2) bearing material, which comprises the bearing alloy and substrate and has layered structure. The substrate is low-carbon steel substrate comprising 0-0.03 wt.% (excluding 0) carbon, less than or equal to 0.05 wt.% silicon, 0-0.5 wt.% (excluding 0) manganese, 0-0.035 wt.% phosphorus, less than or equal to 0.025 wt.% sulfur and balance copper. The roughness of the contact surface between substrate and the bearing alloy is 25 Ra. The thickness of bearing alloy is 0.5-2 mm and substrate is 1-3 mm; and (3) preparation of the bearing material.