▎ 摘　　要

NOVELTY - A micro-nano composite ceramic tool comprises micron alumina, micron tungsten carbide and nano titanium carbide as phase material, graphene as toughening phase, micron magnesia and micron yttria as sintering aids and micron metal cobalt as metal binder. USE - Micro-nano composite ceramic tool used in high-speed machining of difficult-to-machine materials such as hardened steel and ultra-high-strength steel. ADVANTAGE - The micro-nano composite ceramic tool has dense structure, fine particles and excellent performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of micro-nano composite ceramic tool.