COATING METHOD Russian patent published in 2003 - IPC

FIELD: mechanical engineering. SUBSTANCE: method involves preliminarily heating and supplying pressurized air into supersonic nozzle; forming supersonic air flow in said nozzle; feeding powder material into air flow; accelerating powder material in nozzle by air flow and directing accelerated powder material onto article surface, with abrasive powder material having 30-300 micron size particles being initially fed with following feeding of powder for forming coating. Surface preparing stage and coating deposition stage are practically not separated in time to maintain increased activation extent and purity of surface to be coated. It is of importance that article or part to be coated is not substantially subjected to total heating process, with only part surface requiring coating being heated. Method may be used in recovering shape and sizes of metal parts, as well as in manufacture or repair of articles requiring improved sealing, increased corrosion resistance, fire resistance and other properties. EFFECT: wider operational capabilities, intensified coating process, improved quality of coating, reduced production costs by using the same equipment for different types of coatings. 8 cl, 1 dwg