METHOD OF SURFACE MODIFICATION OF METAL ARTICLES AND DEVICE FOR METHOD REALIZATION Russian patent published in 2000 - IPC

FIELD: metallurgical and machine building industries; technology of surface modification of metal articles. SUBSTANCE: method includes placing of metal articles to reaction chamber at atmospheric or above atmospheric pressure and treatment of article surface which covers microzone remelting of surface layer by microelectroplasma discharges between positive ions concentrated near article surface in ionized foam-vapor-gas medium and article surface. In this case, ionized foam-vapor-gas medium is produced in sections of preparation of reaction chamber. Device for realization of the method includes reaction chamber with appliances for withdrawal of excessive medium, system of electrolyte recirculation and power source. Reaction chamber is multisectional. The first sections are designed for preparation of foam-vapor-gas medium. Working section in which metal article is accommodated or pulled through it, is designed for modification of article surface. The method and device for modification of article surface combines at the same time and place of processes of cleaning of surface from impurities, scale, rust, oxide films and modification of surface layer, i.e. combination of cleaning and modification in single technological operation. EFFECT: higher strength, corrosion resistance, durability of article surface and higher efficiency of modification with reduction of power consumption. 11 cl, 1 dwg, 2 ex