Patch welding repair method

For graphite copper bushings with localized wear, filler welding is a feasible repair method. The size and shape of the bushing is restored by filling the worn area with welding material. Generally, copper alloy welding rods that match the material of the copper bushing are used for welding. For example, for tin bronze graphite copper bushings, a tin bronze welding rod can be used.

Brush Plating Repair Method

Brush plating is an electrochemical deposition technique. When repairing graphite copper bushings, the graphite copper bushings are used as the cathode, and the metal ions in the plating solution are deposited on the wear parts under the action of electric field, thus restoring the dimensions. This method can precisely control the thickness of the plating layer, and the plating solution can be selected according to the needs, such as for copper bushings can choose copper plating solution.

Metal spraying repair method

Metal spraying is the heating and melting of metal materials, which are atomized and sprayed onto the worn surfaces of graphite copper bushings by means of a high-speed air stream. These sprayed metal particles will solidify quickly after hitting the surface to form a coating. Commonly used metal spraying materials include zinc, aluminum and copper. For example, for copper bushings you can choose a copper-based spray material, which ensures material compatibility.

Replacement of graphite inlays (if applicable)

Some graphite copper bushings are constructed with graphite inlays in the copper bushing matrix. When the graphite is severely worn, but the bushing matrix is lightly damaged, replacement of the graphite inlay may be considered. New graphite inlays will restore the lubrication and friction reduction function of the bushing.