INVESTIGATION OF CUTTING PROPERTIES OF DOMESTIC HARD ALLOYS FOR A UNIFIED TOOL AND SELECTION OF A PAIR OF MATERIALS IN TURNING HEAT-RESISTANT ALLOYS
The article discusses scientifically based technical approaches to the problem of determining feeds and cutting speeds that ensure the minimum intensity of dimensional wear of cutters when turning the working surfaces of machine parts and devices with a unified carbide tool on universal machines, longitudinal turning machines and CNC machines. The technique for assigning feeds and optimal cutting speeds according to the matrix tables of multilevel basic technology created in the primary subsystem, based on the law of constancy of the optimal cutting temperature, providing maximum tool life, the highest machining accuracy at the optimal cutting speed, both for structural, alloyed, and heat-resistant, corrosion-resistant, hardened, titanium and other hard-to-machine materials. The cutting properties and resistance characteristics of series domestic hard alloys for the manufacture of repeatedly regrinded cutting elements of patented unified cutters in the finishing and finishing turning of nickel-based heat-resistant alloys have been studied. These hard alloys were studied in comparison with those recommended by foreign manufacturers of cutters with SMP for similar applications, for example, for turning heat-resistant alloy Inconel 718 (ХН45МВТЮБР).