FIELD: electric spark treatment processes and equipment, possibly for making cutting tools in different branches of machine engineering.
SUBSTANCE: method comprises steps of applying wear resistant coating onto cutting surface of tool with use of electric spark alloying process; placing tool in special fitting such as master-templates and radiators made of high temperature-conducting materials; applying coating on the whole length of front cutting surface in the form of stripe with width H = (2.0 - 2.5)h from line of thread profile apexes (h - height of thread profile) and with thickness of layer 35 - 70 micrometers while providing increased heat sink from apexes of threaded cutting profiles. Special fitting is made of copper.
EFFECT: lowered material and energy consumption for making tools, increased useful life period of thread cutting tools.
2 cl, 7 dwg, 1 ex
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