Copper-based self-fluxing alloy powder

       Alloy elements such as Si, Sn, P, B are added to the copper matrix. Si can significantly reduce the melting point of copper; B can significantly improve the fusion weldability of copper alloys. This kind of alloy has low melting point and good fluidity. It has good wetting ability to base metals such as steel, bearing steel, copper alloy and cast iron, and has good spray welding process performance. The addition of a small amount of B can protect the molten pool from A removal and slag formation, and is especially suitable for flame spray welding. Ni can solidify with Cu infinitely, improve the strength and lining corrosion performance of copper alloy, and may combine with boron in the alloy to form Ni2B hard phase and improve the wear resistance of the alloy. There is limited solid solution in tin and copper to form a+ metallographic structure and improve the wear resistance of copper alloys. The solubility of phosphorus in a copper is very small, and it forms a low melting point eutectic alloy with copper with a melting point of only 714 ° C. The eutectic precipitates hard and brittle Cu3 P, which is dispersed in the copper matrix, which is beneficial to improve the wear resistance of the alloy sex. P is also a strong deoxidizer, which has the ability to deoxidize the solder layer, and can reduce the surface tension of the copper liquid and improve the wettability of the copper liquid to the substrate.



    Copper-based self-fluxing alloy powder, commonly used in powder flame spray welding and plasma spray welding to prepare a spray welding layer with good thermal conductivity, electrical conductivity or corrosion resistance, low friction coefficient, and excellent adhesion, friction and wear resistance, and is easy to cut to low It is mainly used for surface strengthening and repairing of low-pressure valve sealing surfaces, cast iron parts, machine tool guide rails, copper alloy parts and shaft sleeves.

    There are mainly silicon manganese bronze type self-fluxing alloy powder, phosphor bronze type self-fluxing alloy powder and so on. 

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