METHOD OF SUPERSONIC THERMOSHOCK SURFACE PREPARATION AND HIGH-SPEED GAS-DYNAMIC AND THERMODIFFUSION APPLICATION OF PROTECTIVE COATINGS ON ARTICLES AND DEVICE FOR IMPLEMENTATION THEREOF Russian patent published in 2020 - IPC C23C8/60 C23C10/30 C23C12/00 C23C8/40 C23C10/18 

FIELD: technological processes.

SUBSTANCE: invention relates to supersonic thermo-abrasive heat-shock treatment of parts surfaces with subsequent high-speed application of metal or composite protective coatings and can be used in various industries. Disclosed method involves loading articles into a reaction chamber, rotating a reaction chamber, processing articles, opening a working chamber of the reaction chamber and unloading the articles. After the working chamber is filled with articles, the flange is closed. Then, a nozzle of the supersonic apparatus is introduced through the hole in the flange to form controlled and controlled by the parameters of the supersonic jet of combustion products of liquid or gaseous hydrocarbon fuel in the compressed air flow, the speed of the supersonic jet is set within 1–7 Mach. Then the temperature is brought on the surface of workpieces in the reaction chamber in range from 30 to 600 °C for not more than 2 seconds, atmospheric oxygen is squeezed out by the supersonic apparatus from the processed surface of the article, the surface of the articles is cleaned from contaminants, scales and oxides and the surface of the articles is activated. Thereafter, a protective coating is applied on the surface of the articles in a continuous process, where the required powder materials and/or passaging solutions are supplied to the supersonic apparatus. Proposed device comprises reaction chamber with possibility of rotation around frame axis by means of rotation drive for transition to "loading" and "unloading" position, a flange providing closure of the reaction chamber, a supersonic apparatus, a control unit which enables to measure parameters of feeding and dispensing powder materials and control parameters of the supersonic jet of combustion products of liquid or gaseous hydrocarbon fuel in a compressed air flow, sensors of control and fixation of reaction chamber in three positions "loading", "processing", "unloading" and position of supersonic apparatus, system of video monitoring of cavity of reaction chamber and system of combustion products removal, recuperation of materials and dust trapping.

EFFECT: higher quality of cleaning surfaces of parts and application of coating, high efficiency due to intensification of processing, reduced inter-operation transitions and improved environmental friendliness due to exclusion of ingress of dusty and gaseous components into the shop.

6 cl, 1 dwg, 2 ex