Process for spraying and coating bronze at steel and iron surface using oxygen-acetylene subsonic flame

Abstract

The invention discloses a technique process which utilizes oxygen-acetylene subsonic flame to spray bronze alloy on steel surface, belonging to the technical field of the spraying of material surface. Firstly, the surface of a steel member is proceeded the treatment of deoiling, derusting and surface roughening, the surface of the steel member is preheated by the oxygen-acetylene subsonic flame, the oxygen-acetylene is employed as combustion flame, compressed air is utilized as powder-feeding air and speed up air, and atomizing particle flow is high-speed sprayed to the member surface by a subsonic spray gun and a compress-swelling spraying nozzle with the structure of spiral gas mixing and spraying-absorbing air inletting. The surface of steel member is firstly sprayed with nickel coated aluminum composite powder which is used to be base coat, then the base coat is sprayed with aluminum bronze layer, and hole-seal treatment is instantly proceeded after being sprayed. The invention has the advantages of high spraying efficiency, high binding intensity of an interface, perfect corrosion resistance, simple operation, beautiful formation of the appearance, low cost, easy popularization and application, and the like. In addition, the technique is in particular adaptable for spraying the surfaces of outdoor large-scale formations or statues.

Description

1. Technical field [0001] The invention relates to a method for spraying bronze, in particular to a method for spraying bronze on a steel surface with an oxygen-acetylene subsonic flame, and belongs to the technical field of surface spraying of material science and engineering. 2. Technical background [0002] Material surface cladding methods (such as surfacing, brush plating, spraying, etc.) and their combined processes are often limited by the size of the parts, structural form and use environment. For example, large iron castings with complex structures are difficult to use surfacing welding or brush plating methods for surface treatment. In recent years, with the development and application of spraying technology, the technology of preparing coatings on material substrates has been widely used. Among them, oxy-acetylene flame spraying has attracted attention because of its low cost, high spraying efficiency, easy operation and wide application range. This technology h...

AI Technical Summary

Problems solved by technology

The second is to add a surfactant to the bronze alloy to modify it to form a low-nickel (or nickel-free), low-boron, and silicon-free bronze-based alloy powder, and then spray it. This method changes the quality of the bronze alloy. The original composition of the layer, which will reduce the performance of the bronze alloy coating

After searching, the method of spraying bronze on the surface of iron and steel materials by subsonic flame spraying technology has not been reported yet.