The role of white fused alumina in casting coatings is mainly reflected in improving the surface quality of castings, enhancing coating performance and optimizing casting processes, as follows:
1. Improving the surface quality of castings
1. Scraping impurities and unevenness: The high hardness and wear resistance of white corundum enable it to effectively scrape oxides, impurities and unevenness on the surface of the mold, ensuring a smooth and uniform surface of the casting, reducing defects such as pores, inclusions and unevenness.
2. Optimizing surface finish and precision: During the casting process, white corundum particles help purify the metal surface through interaction with the molten metal, reduce the formation of pores and defects, and significantly improve the surface finish and precision of the casting.
2. Enhancing coating performance
1. Improving wear resistance and corrosion resistance: White corundum particles, as coating fillers, can significantly improve the wear resistance and corrosion resistance of the coating and extend the service life of molds and castings.
White corundum
2. Enhance corrosion resistance: White fused alumina has good chemical stability and corrosion resistance at high temperature, can effectively resist the scouring and corrosion of molten metal, and protect the mold surface from damage.
III. Optimize casting process
1. Improve coating fluidity and strength: White fused alumina , as a coating filler, can reduce the gas production of the coating, reduce the expansion coefficient, make the coating more fluid and stronger, thereby optimizing the casting process.
2. Replace high-cost materials: White fused alumina is close to or even better than high-cost materials such as zircon sand in performance, and can replace them to a certain extent, reduce production costs, while maintaining or improving coating performance.
2. Improve casting efficiency and quality: The uniform distribution of white fused alumina particles in the coating helps to form a uniform coating, reduce defects in the casting process, and improve casting efficiency and casting quality.