FIELD: tube rolling.
SUBSTANCE: method includes casting of blanks out of alloy with contents of carbon 1.8-3.2% and chromium 30.0-35.0%, thermal aging, machining of surface of the blank to rough and finishing dimensions with a cutting tool, combining machining with heating of a machined portion; at that the surface of the machined potion is heated up to 600-800° C at a length of 3.0-3.5 mm with a plasma arc of current 60-160 A and power 12 kilowatt; the center of the heated portion is located in front of the cutting tool edge at a distance of not more, than 20 mm.
EFFECT: reduction of labour input at machining, upgraded accuracy of both geometric dimensions of a finished product and of micro hardness of the surface layer, and increased wear resistance of work holders not less, than two times.
1 dwg
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