FIELD: metal working industry branches, namely processes for cutting metals in metal cutting machine tools. SUBSTANCE: method comprises steps of heating worked surface by means of acetylene-oxygen burner with controlled temperature of flame; sustaining temperature of flame torch in points of flame touching of part surface equal to (800-1000)C; keeping spacing from center of heated spot before starting metal cutting until achieving in cut layer softening temperature (550-600)C; placing burner tangentially relative to surface of heated part. EFFECT: significantly enhanced cutting efficiency, improved quality of worked parts. 2 cl, 2 dwg
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