Electric conduction roller sprayed with metal ceramic coating and manufacturing method thereof

Abstract

The invention relates to an electric conduction roller sprayed with metal ceramic coating, comprising an electric conduction roller matrix. The electric conduction roller is characterized in that thesurface of the electric conduction roller matrix is sprayed with metal ceramic coating containing one of tungsten carbide, chrome carbide and tungsten-chrome carbide or combination of at least two oftungsten carbide, chrome carbide and tungsten-chrome carbide; wherein tungsten carbide, chrome carbide and tungsten-chrome carbide are taken as hard phase in the metal ceramic coating and account for75-92% of the total weight, nickel, cobalt, CoCr, nickel-chromium are taken as splicing phase of the metal ceramic coating and accounts for 25-8% of the total weight, wherein the thickness of the sprayed metal ceramic coating is more than 0.1mm. The invention adopts a supersonic speed flame device to spray a tungsten carbide or chrome carbide metal ceramic coating on the surface of the electric conduction roller, so that the surface of the electric conduction roller is ground, trimmed and polished, less corrosion and arc spot are produced on the surface of the electric conduction roller, and the service life of the electric conduction roller is prolonged. When the service life of the electric conduction roller comes to the end, the coating is run out and respraying is carried out, the diameter of the electric conduction roller is not reduced, the original matrix can be recycled, and material is saved.

Description

technical field [0001] The invention relates to a conductive roller and a manufacturing method thereof, in particular to a method of utilizing supersonic flame spraying to coat a cermet coating of a conductive roller in electroplating and electrolytic deposition industries and the conductive roller. Background technique [0002] Supersonic flame spraying technology is especially suitable for spraying some cermets due to its advantages of fast flame speed, low temperature, high coating bonding strength and convenience. [0003] The main function of the conductive roller used in the continuous production line of electroplating and electrolytic deposition is to guide the large current to the metal strip (steel strip or copper strip, etc.) It advances evenly in the middle, and the speed is generally around 100rpm. There are more than 6 conductive rollers working continuously on each production line. [0004] At present, the surface of the conductive roller used in the continuou...