Method for cladding a hollow electrode nitrogen ion

Abstract

The invention relates to a method for cladding a hollow electrode nitrogen ion, which effectively solves the problems of large mechanical field restoration with convenience, flexibility, good quality, low cost and non pollution, and surface reinforcement of anti-wear anti-corrosion anti-impact thick coating. The technical proposal solving the problems is that: the surface of a metal component to be treated is subjected to decontamination treatment; the upper end of a hollow electrode is provided with a wind-cooling conductive powder feed electrode seat; the wind-cooling conductive powder feed electrode seat and the clad metal component are connected with two electrodes of a direct current welding machine, and the positive electrode and the negative electrode can be switched; a powder feeder is connected, so that alloy powder and nitrogen enter the center hole of the hollow electrode, and are sprayed from the lower end of the hollow electrode; the lower end of the hollow electrode and the surface of clad and reinforced metal component are contacted with a starting arc; the surface metal of the treated metal component is quickly melted by high temperature of an electric arc, and forms alloy melt with the alloy powder; the alloy melt is solidified in sequence along with forward movement of the hollow electrode to form a thick coating with metal substrate in metallurgical bonding. The method has the advantages of easy operation, low cost, non pollution and enormous economical and social benefit.

Description

1. Technical field [0001] The invention relates to mechanical processing, in particular to a hollow electrode nitrogen ion cladding method for on-site repair of large-scale mechanical equipment and surface wear-resistant, corrosion-resistant and impact-resistant thick coating reinforcement. 2. Background technology [0002] At present, the large-scale mechanical equipment repair and surface wear-resistant, corrosion-resistant and impact-resistant thick coating strengthening methods in industry include wear-resistant electrode surfacing, laser cladding, thermal spraying, flux-cored wire hard-facing surfacing, plasma beam surface metallurgy, etc. Among them, wear-resistant electrode surfacing is only suitable for partial repair and strengthening of mechanical parts with low technical requirements due to the waste of alloy elements, harmful welding fumes, low efficiency, and poor quality of surfacing layers; laser cladding can obtain high-quality Wear-resistant, corrosion-resis...

AI Technical Summary

Problems solved by technology

[0004] In view of the above situation, in order to overcome the defects of the existing technology, the purpose of the present invention is to provide a hollow electrode nitrogen ion cladding method, which can effectively solve the on-site repair and surface wear resistance of large-scale machinery that is convenient, flexible, good in quality, low in cost, and pollution-free. The technical solution to the problem of strengthening the corrosion-resistant and impact-resistant thick coating is to decontaminate the treated surface of the metal parts. Connect the two poles of the DC welding machine with the metal parts to be clad, and the positive and negative poles can be switched; connect the powder feeder, so that the alloy powder and nitrogen enter the center hole of the hollow electrode through the air-cooled powder feeding electrode seat, and spray out from the lower end The arc is struck by contacting the lower end of the hollow electrode with the surface of the metal part strengthened by cladding. The high temperature of the arc rapidly melts the surface metal of the metal part to be processed, and forms an alloy melt with the alloy powder. As the hollow electrode moves forward, the alloy melt Sequentially solidify to form a thick coating with high hardness and impact resistance that is metallurgically combined with the metal substrate. The method of the present invention is unique, easy to operate, low in cost, safe, good in product quality, high in production efficiency, pollution-free, and has huge economic and social benefits

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