▎ 摘　　要

NOVELTY - Narrow particle size thermally stable tungsten carbide powder with a sandwich type nano-sheet structure, and the narrow particle size thermally stable tungsten carbide powder is tungsten carbide and modified graphene nanosheets in order from inside to outside. USE - The narrow particle heat stable tungsten carbide powder is used in various engineering applications e.g. manufacturing hard alloy, rock drill bit and thermal spraying coating. ADVANTAGE - The narrow particle heat stable tungsten carbide powder has narrow particle size distribution, self-lubricating effect, and corrosion resistance effect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a preparation method of narrow particle heat stable tungsten carbide powder.