How to polish the surface of carbon fiber

Rough polished carbon fiber surface

For most carbon fiber products, cast iron discs or less plush fabrics can be used for rough polishing. Take the carbon fiber plate as an example, the carbon fiber plate needs to be accessed, the polishing surface can be parallel to the plane of the polishing disc, and the polishing surface needs to be pressed smoothly on the rotating grinding disc. At the beginning of polishing, the carbon fiber plate moves from the center to the edge, and the pressure should not be too high. At the end, the carbon fiber plate moves from the edge to the center, and the pressure gradually decreases.

Reminder: When rough polishing carbon fiber materials, just add water to cool them, and do not need to add polishing and wear-resistant materials. Generally, the rough polishing time is 2-5 minutes, and the standard is to remove all the scratches caused by polishing on the surface of the carbon fiber plate.

Carbon fiber surface finish polishing

1. Fine polishing of carbon fiber products, the process of fine polishing is generally to use 2.5μm diamond mixed liquid to sprinkle on the woolen cloth with medium level plush, add suitable emulsion lubricant, and the speed ratio is 200-250r/ Polish in a polishing machine for 2-3 minutes until all the scratches caused by rough polishing are removed.

2. Then, when polishing with 1 μm aluminum oxide, distribute the aluminum oxide mixture evenly on the plush velvet cloth, and add appropriate lubricating liquid for polishing. The polishing time is about 3-5min, and the speed ratio of the polishing machine is 100-150r/min. Clean the specimen with tap water or an aqueous solution containing cleaning fluid after polishing.

3. Finally, use metallographic analysis. After fine polishing, the test piece should be bright and free of traces. Under a 100-fold microscope, no tiny scratches can be seen, and there must be no tailing. The porosity is fully displayed and reflects the true appearance. If it does not meet the requirements, it should be polished again.

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