FIELD: working metals by cutting, working carbonaceous and alloyed steels and refractory alloys. SUBSTANCE: method comprises steps of determining temperature of maximum workability of hard alloy and dependence of cutting temperature from cutting speed. In order to lower labor consumption, setting temperature of maximum efficiency according to temperature of beginning of fracture zone in dependence "temperature - shock ductility of hard alloy". EFFECT: enhanced accuracy of method. 3 dwg
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