▎ 摘　　要

NOVELTY - The utility model claims a coating blade, comprising a hard alloy substrate; two sides of the hard alloy substrate are coated with a graphene layer; the graphene layer is coated with a functional coating; one side of the hard alloy substrate located at the back of the cutter is provided with a groove; the groove is connected with a heat pipe. The utility model takes away the heat of the blade outer surface through the graphene layer heat conducting, taking away the heat in the blade through the heat pipe, the temperature of the blade is kept in a reasonable range, lifting the service life of the cutter.