FIELD: metal cutting processes and equipment. SUBSTANCE: method comprises steps of short time period standard testing of sample hardness at different temperature values; determining temperature of cutting at different cutting speeds and drawing respective plots; in order to lower labor consumption at determining optimal cutting speed on base of short time period standard testing, taking hard-alloy samples and determining temperature corresponding to maximum working capacity of hard alloy; using said temperature for determining optimal cutting speed with the aid of drawn plots. EFFECT: enhanced reliability and accuracy of method. 3 dwg, 1 ex
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