METHOD OF RESISTANCE INCREASE OF WEAR OF THREADED SURFACE OF PARTS FROM ALLOY STEEL Russian patent published in 2015 - IPC C25F3/24 C23C14/48 

FIELD: machine building.

SUBSTANCE: method involves surface preparation for coating application and application of wear-resistance coating. Surface preparation for coating application is combined with strengthening treatment, which operations sequence is as follows: a part is placed in electrolyte, gas-vapour envelope is formed around treated part surface, electrical discharge between treated part and electrolyte is allowed by means of electrical potential delivery to the treated part. Mode of electrolytic-plasmatic finishing of threaded surface is performed; after electrolytic-plasmatic finishing of threaded surface, parts are placed in vacuum chamber of the plant for ionic-implantation treatment; ionic cleaning by argon ions is performed at energy of 6-8 keV, as well as ionic-implantation treatment of part surface by ytterbium or nitrogen ions is performed; and then in this plant wear-resistance coating from titanium nitride or zirconium nitride with thickness of 0.5-1.0 micron is applied by ionic-plasmatic method.

EFFECT: improving performance properties of parts threaded surfaces.

22 cl, 1 ex