News Information
The materials used to manufacture cutting tools must have high high-temperature hardness, wear resistance, bending strength, impact toughness, and chemical inertness, good processability (cutting, forging, heat treatment, etc.), and be not easily deformed. Usually, when the material hardness is high, the wear resistance is also high; When the bending strength is high, the impact toughness is also high. But the higher the hardness of the material, the lower its bending strength and impact toughness. High speed steel is still a widely used tool material in modern times due to its high bending strength, impact toughness, and good machinability, followed by hard alloys.
Polycrystalline cubic boron nitride is suitable for cutting high hardness quenched steel and hard cast iron, etc; Polycrystalline diamond is suitable for cutting non-ferrous metals, alloys, plastics, and fiberglass; Carbon tool steel and alloy tool steel are only used as tools such as files, dies, and taps. The hard alloy reversible blade has been coated with a hard layer of titanium carbide, titanium nitride, aluminum oxide or composite hard layer by chemical vapor deposition. The developing vapor deposition method can be used not only for hard alloy cutting tools, but also for high-speed steel cutting tools such as drill bits, rolling cutters, taps, and milling cutters. Hard coatings act as barriers to chemical diffusion and thermal conduction, slowing down the wear rate of cutting tools during cutting, and increasing the lifespan of coated blades by approximately 1-3 times compared to uncoated ones.
