METHOD OF DEPOSITION OF A COATING ON INTERNAL SURFACES OF SMALL SIZE PARTS AND ON PARTS MADE OUT OF MATERIALS WITH HIGH HEAT CONDUCTIVITY Russian patent published in 2005 - IPC

FIELD: aircraft building; mechanical engineering; power engineering; methods of gas-thermal deposition.

SUBSTANCE: the invention is dealt with a method of gas-thermal deposition and may be used for deposition of heat-resisting coatings on internal surfaces of small-size parts and parts made out of materials with high heat conductivity used in aircrafts engines, mechanical engineering, power engineering and at recovery of a worn surface of parts. Plasma deposition is used for production of a multilayer coating consisting of metal and ceramic layers using a powder material. Before the deposition it is necessary to conduct investigation of geometric parameters of a metallized roller, which is exposed to deposition in operational modes at absence of longitudinal motion of the plasmatron. The way the width of a metallized figure is produced. Deposition is conducted at rotation of a part. At first they deposit initial metal and ceramic layers of 20-30 microns thick at motion of the plasmatron per one revolution of the part by at least of 0.5 of the width of the metallized figure, at an amperage of 530-550А and an invariable dosing of the powdered material. Then the deposition up to the given width of the coating is conducted with a step of motion of the plasmatron of 3-5 mm/rev and the amperage of 450-480А. The technical result is a high quality of produced coatings, that is the high adhesive and cohesive strength.

EFFECT: the invention ensures a high quality of produced coatings, that is the high adhesive and cohesive strength.

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