STRENGTHENING OF THE CARBIDE ALLOY OF WOOD CUTTING SAWS WITH COMPOSITE MATERIALS

Abstract

The article covers issues related to the strengthening of solid tungsten-cobalt alloy plates of wood-cutting disc saws with new tungsten-free composite materials. It is shown that the domestic hard alloy is significantly inferior to the similar hard alloy of foreign production. This is primarily related to the technology of its production (the imperfection of the equipment for grinding tungsten, which does not make it possible to obtain the required dispersion and the method of sintering). It is noted that one of the ways to solve these problems is the development of a technology for strengthening hard alloy plates, which will make it possible to increase the stability indicators of the tool. Wear resistance can be increased by special surface treatment with the help of new composite materials, which changes such properties of the main material as hardness, corrosion and operational wear resistance, and strength. The problem of surface strengthening of wood-cutting tools with the use of wear-resistant coatings is quite urgent, as it opens wide opportunities for the creation of new special materials with fundamentally new physico-mechanical and physico-chemical properties. Advanced technologies for obtaining such coatings include the method of their formation under the action of concentrated energy flows with the use of electrospark alloying. The main advantage of the surface treatment of materials is that despite the high hardness and strength of the surface layer, the high plasticity and viscosity of the base is preserved. That is why research aimed at strengthening wood-cutting saws with new materials using the electrospark alloying method is relevant. The purpose of the research is to increase the service life of the wood-cutting tool by electrospark alloying of hard alloy with new composite materials and to reduce the shortage of hard alloys. The research results showed that dusts with strengthening treatment of teeth with a material based on titanium carbide КТФХ have the greatest resistance.