AREAS OF APPLICATION IN CUTTING, TURNING, MILLING, DRILLING AND OTHER PROCESSING METHODS OF HARD ALLOYS

According to the patent and scientific literature on the research topic, the grain size of tungsten carbide determines the processing modes of the material and the presence of grain growth inhibitors containing some rare metals. The structure of the hard alloy, in turn, affects the bending resistance and hardness of the material. The best results were recorded for small-sized tungsten carbide grains. Due to the relatively high cost of tungsten, a group of tungsten-free hard alloys called kermites has been developed. These alloys contain titanium carbides (TiC) and titanium carbonitrides (TiCN) bonded to a nickel-molybdenum base. Their production technology is similar to hard alloys containing tungsten. Compared with tungsten hard alloys, these alloys have lower bending strength and impact strength, are sensitive to temperature changes due to low thermal conductivity, but have the advantages of increased heat resistance (1000 °C) and low adhesion to workpieces