High-speed steel for high-toughness high-abrasion resistance hobbing cutter and preparation method thereof

The invention discloses high-speed steel for a high-toughness high-abrasion resistance hobbting cutter and a preparation method thereof. Compared with chemical components of traditional high-performance high-speed steel, the usage of noble metal cobalt is reduced, the content of carbon and vanadium with low prices are correspondingly added, so that the grain tissue of the high-speed steel can be refined, the hardenability can be increased, and the production cost can be reduced on the premise of guaranteeing corresponding functions of high toughness and high-abrasion resistance; and by utilizing the method for preparing the high-toughness high-abrasion resistance high-speed steel provided by the invention, the content of N is controlled to be lower than 150ppm, the formation of large-particle carbide is weakened, and the grindability is improved. The method for preparing the high-speed steel can be used for preparing hobbing cutter and gear and other rotary elements in automobile and mechanical engineering in