Coated Tungsten Carbide Cutting Tools Surface Characteristics

Since the hardness and wear resistance of tungsten carbide cutting tools better, but poor toughness, can be obtained by the cemented tungsten carbide substrate, using CVD (chemical vapor deposition), PVD (physical vapor deposition), HVOF and other methods, a coating layer wear TiC, TiAlN, A12O3 and other thin layer (5 ~ 12μm), forming a surface coated tungsten carbide cutting tools, so that both high surface hardness and high wear resistance, but also tough matrix, can improve the tool life and processing efficiency.

Coated tungsten carbide cutting tools higher than the matrix hardness and wear resistance, high heat resistance (up to 800 ~ 1000 ℃). Such as hardness at normal temperature for HV2000, at 1000 ℃ still maintain HV1000, without coated tungsten carbide cutting tools fell to HV500. Coated tungsten carbide cutting tools than uncoated tungsten carbide high durability (generally 1 to 3 times increase, high up 5 to 10 times), high cutting speed, feed rate and cutting depth larger. These characteristics determine the coated tungsten carbide cutting tools especially for FMS, CIMS (Computer Integrated Manufacturing System) and other automated processing equipment. Coated tungsten carbide is one of the greatest achievements made in recent years in the field of tungsten carbide is another change cutting tool development.

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