The application of PVD coatings on aluminium alloy workpieces mainly includes the improvement of hardness, wear resistance, corrosion resistance and machining quality.
(1) Improvement of hardness and wear resistance: By depositing a layer of PVD coating on the surface of aluminium alloy, the hardness of the workpiece can be effectively improved, and its anti-scratch and wear resistance can be strengthened. For example, by applying DLC (Diamond Like Carbon) coating on aluminium moulds, the service life of the moulds can be directly increased by 5-10 times.
2) Improved machining quality: PVD coatings can improve the drilling performance of HSS micro drills when drilling aluminium alloys, including improved drilling quality and reduced tool wear. By preparing coatings such as DLC, TiN and AlTiN on HSS micro drills, the wear resistance and machining efficiency of the drill can be significantly improved.
(3) Enhancement of corrosion resistance: PVD coating can not only improve the hardness of aluminium alloy workpiece, but also enhance its corrosion resistance.
In conclusion, the application of PVD coating technology on aluminium alloy workpiece significantly improves the performance and service life of aluminium alloy workpiece by improving the hardness, abrasion resistance, corrosion resistance and optimizing the machining quality.