Tungsten Carbide Cutting Tools Wear Amount Impact-Cutting Speed

When cutting tungsten carbide cutting tools, tungsten carbide cutting tools for cutting the amount of wear has a significant impact, especially in cutting speed. Different cutting speed on the wear of tungsten carbide cutting tools have different variations. In general, the greater the cutting speed, the greater the amount of flank wear, the more severe tools wear. Uncoated tungsten carbide tools in high-speed cutting, the rapid rise in the amount of flank wear, cutting the distance is very short, but the amount is much larger than the amount of wear and wear low-speed cutting. When the cutting speed reaches 100m / min or more, the coating due to friction during cutting off, the substrate is exposed to participate in a cutting tool. Lead to increased wear of tungsten carbide cutting tools, and ultimately failure.

Different grades of tungsten carbide cutting tools wear is as cutting speed increases. Low speed cutting with adhesive wear as the main wear mechanism, high-speed cutting wear and diffusion wear oxide as the main wear mechanism. This is because with the increase in cutting speed and tools - chip contact surface temperature with increasing pressure, knife - contact debris from sliding contact between the adhesive into contact. Under the adhesion force in the tools and workpiece contact surface friction generated by the process, the tools material fine particles from peeling or cutting. When the cutting temperature reaches 800 ~ 900 ℃, decomposition occurs between the workpiece and the tools element and the diffusion element to each other, the strength of the tools is reduced, resulting in tungsten carbide cutting tools wear or breakage failure.




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