▎ 摘　　要

NOVELTY - High-speed steel self-lubricating coating comprises 9-10 wt.% cobalt (Co), 3.5-4.2 wt.% chromium (Cr), 0.1-0.7 wt.% carbon (C(n)), and balance tungsten carbide (WC). USE - High-speed steel self-lubricating coating. ADVANTAGE - The high speed steel self-lubricating coating has excellent anti-wear and anti-drag, function effectively reduces the friction coefficient and abrasion loss of the coating, enhances the fracture toughness and antireflective ability, and is simple in technique and easy for industrial application. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of high-speed steel self-lubricating coating comprising placing expanded graphite in anhydrous ethanol, peeling, auxiliary mechanical stirring to obtain graphene suspension, mixing tungsten WC10Co-4Cr powder and KH570 coupling agent and graphene suspension, dry sieving to obtain mixed powder, and supersonic flame thermal spraying.