METHOD OF APPLICATION OF COATING BY SURFACE WELDING OF SOLDER ON STRUCTURAL STEEL SURFACE Russian patent published in 2005 - IPC

FIELD: mechanical engineering; surface welding.

SUBSTANCE: invention can be used for application of wear resistant coating onto working surfaces of cutting tools, for instance, abrasive coating into surface of milling cutter. Surface to be treated is milled and degreased with organic solvent. Prior to application of solder, flux is applied in layers. Used as flux is saturated water solution of mixture of boric acid, 30%, and sodium tetraborate, 70%. In process of application, flux is head to 300-350°C to completely evaporate water and form solid layer of flux on surface of steel and subsequent porous layer of flux. Solder is applied to flux coated surface of steel with simultaneous delivery of flux of preliminarily dehydrate mixture of boric acid, 30% and sodium tetraborate, 70%, to zone of welding with provision of filling of pores in coating with molten flux. Coating is composite material containing metal solder, particles of hard alloy and glass solder. Glass solder, as viscous component, restrains grows and development of cracks formed in operation of cutting tool.

EFFECT: improved quality of working surface of cutting tools.

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