METHOD FOR TREATING MACHINE AND MECHANISM PARTS BY MEANS OF PULSE ELECTROMAGNETIC FIELD Russian patent published in 2007 - IPC C21D1/04 

FIELD: machine engineering, namely methods for enhancing reliability and useful time period of working organs of submerged equipment of electrically driven centrifugal pumps used in oil production industry.

SUBSTANCE: parts of machines and mechanisms are treated by means of electromagnetic field created with the aid magnetic field inductor during two stages. At first stage parts are subjected to action of pulse electromagnetic field with frequency 10³ - 10⁵ Hz, intensity 10⁵-10⁷ A/m, duration of field action 1 - 10 s. At second stage aperiodic pulse of electromagnetic field with amplitude of field intensity 10⁶ - 10⁷ A/m at pulse rising rate 10⁹ - 10¹¹ A/m/s and pulse duration 100 - 1000mcs is used while number of pulse is in range 10 - 100 and gradient of magnetic field inductor is selected to be no less than 10⁵ A/m/mm.

EFFECT: enhanced set of operational characteristics of parts, namely mechanical physical physical-chemical parameters, decreased adhesion activity of metal surface.

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