Tungsten Carbide Cutting Tool Coating Technology Introduction
- Details
- Category: Tungsten Information
- Published on Wednesday, 29 October 2014 18:16
During machining, the cutting tool property has decisive impact on the cutting efficiency, precision, and surface quality. Two essential dictators of tungsten carbide tool property are hardness and intensity, which, however, are always contradictory to each other. Materials with high hardness are often at the expense of their intensity, while increased intensity always results in decreased hardness. In order to settle this kind of contradiction and improve cutting tool property, one effective solution is by taking coating technology. Coatings are materials put on the surface of tungsten carbide cutting tools through coating technology and they are of high hardness and high abrasion resistance. The tungsten carbide cutting tool coating, like a chemical and thermal barrier, can reduce crater wear of the tools and thus significantly improve machining efficiency and precision, extend tool life and reduce cost.
Tungsten carbide cutting tool coatings help improve tool's abrasion resistance but at the same time maintain tool intensity and reduce friction between tools and work pieces, so the tool life is thus extended. In addition, because the coefficient of heat conduction of coatings is much lower than that of tools and materials being processed, it can contribute to reducing heat caused by friction. It forms a thermal barrier and change the ways of heat lost, and thus reducing the thermal and force impact from the friction and effectively improve the tool property.
Main functions of tungsten carbide cutting tool coatings are as follows:
I. To form a isolated layer between tools and materials being processed.
II. To reduce thermal impact through inhibiting heat conduction from cutting area to blades.
III. To effectively reduce friction and heat caused by friction.

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