1) Excellent hardness and wear resistance At room temperature, the hardness of cemented carbide can reach 8693HRA, which is equivalent to 6981HRC. It has a high hardness of 900-1000°C and good wear resistance. The cutting speed can be 4-7 times faster than high-speed tool steel, the service life can be extended by 5-80 times, and it can cut hard materials with a hardness up to 50HRC. 2) High strength, high elasticity The compressive strength of cemented carbide is as high as 6000MPa, and the modulus of elasticity is (4-7)×105MPa, which is greater than that of high-speed steel. However, its flexural strength is moderate, ranging from 1000 to 3000 MPa. 3) Excellent corrosion resistance and oxidation resistance Resistant to air, acid, alkali and other corrosion, not easy to oxidize. 4) Low coefficient of linear expansion During operation, the shape and size remain stable. 5) No further processing or regrinding of molded items. Due to the extremely high hardness and brittleness of cemented carbide, it cannot be cut or reground after powder metallurgy forming and sintering. When rework is absolutely necessary, only electric discharge machining, wire cutting, electrolytic grinding, etc. or special grinding wheel grinding can be used. Dimensions, usually made of cemented carbide, are brazed, glued, or mechanically clamped to the tool body or die
Post time: Aug-15-2023
