Tungsten Carbide Cutting Tools Coating Material Comparision

Tungsten carbide cutting tools in high-speed cutting, the blade tip temperatures up to 900 ° C, this time tungsten carbide cutting tools cutting tools wear is not only a mechanical friction and wear (behind the main form of tool wear), and adhesive wear, diffusion wear and oxidative wear (mainly in the form of the tool edge wear and crater wear), so that the cutting process can be considered as a process of physical and chemical changes of a micro-region.

Titanium tungsten carbide cutting tools is a high hardness and wear-resistant compound, has a good anti-friction and wear properties; titanium nitride lower hardness, but have a high chemical stability, and can greatly reduce the friction between the tool and the workpiece to be machined factor. From the coating process considerations, both of which are desirable coating material, but regardless of titanium tungsten carbide cutting tools or titanium nitride coating material, a single coating layer are difficult to meet the high-speed cutting tool coatings on integrated requirements. Antioxidant and anti-wear performance diffusion wear, no material can be compared with alumina (Al2O3). However, due to physical and chemical properties of the alumina matrix material with much difference, can not be made of a single alumina coating preferably coated tools. Emergence of multi-layer coatings and related technology, the coating and the substrate material can improve bond strength, while overall performance with a variety of coating materials.



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