INCREASING THE STABILITY OF HARD ALLOY CUTTING TOOLS BY ADDITIONAL CHEMICAL TREATMENT

Abstract

A method for increasing the wear resistance of cutting plates made of hard alloys T15K6 and T5K10 has been developed by chemical treatment (passivation) in order to create a solid surface layer of WC, (Ti, W)C carbides with a high-precision level of discreteness, which is firmly connected to the tool base. During chemical treatment, cobalt is partially removed from the surface layer of the tool with the formation of tightly bonded to the carbide skeleton of the alloy of salts of refractory metals cobalt, tungsten and titanium, which can serve as antifriction additives and inhibit the setting process. When cutting hardened steel with machined carbide plates, the energy of cutting is dissipated (scattered) by the destruction of many etched boundaries of the WC-WC surface and the formation of microcracks tangential to the surface.