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       Surfacing welding is applied to the repair of materials with thick base materials, such as coal mills, cement mills, and roll repairs.



Spray welding is used in the repair or protection of devices with thin base materials or unsuitable for surfacing, such as high-pressure boiler tube wall spraying, fan blade spraying, etc. Spray welding is to reheat the preheated self-dissolving alloy powder coating to 1000-1300 ℃, so that the particles are melted, slag is formed and floated to the surface of the coating, and the generated borides and silicides are dispersed in the coating, so that the particles Good bond with the substrate surface. The final deposit is a dense metal crystalline structure and forms a metallurgical bonding layer of about 0.05-0.1mm with the matrix, and its bonding strength is about 400MPa, with good impact resistance, wear resistance, corrosion resistance, and a mirror-like appearance.



As an economical and rapid process method for surface modification of materials, surfacing welding is more and more widely used in the manufacture and repair of parts in various industrial sectors. In order to play the role of the surfacing layer most effectively, it is hoped that the surfacing method used has less dilution of the base metal, higher deposition rate and excellent performance of the surfacing layer, that is, high-quality, high-efficiency, and low-dilution surfacing welding. Technology.

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