The main functions of casting materials include the following aspects:
Improving the performance of refractory materials: Some components in casting materials, such as plate-shaped corundum, are often used to manufacture refractory bricks such as aluminum carbon and aluminum magnesium carbon due to their excellent physical properties (such as coarse crystals, well-developed α-Al₂O₃ crystal structure, high purity and good volume stability), thereby improving the performance and service life of refractory materials.
Improving mold life: Plate-shaped corundum has high hardness and wear resistance, and is often used to manufacture key components of casting molds, such as sprue sleeves and runner plates. These components need to withstand the scouring and erosion of high-temperature molten metal during the casting process. The use of plate-shaped corundum can significantly improve the wear resistance and service life of the mold, thereby reducing production costs.
Optimizing the casting process: Plate-shaped corundum has high thermal conductivity and low thermal expansion coefficient, which helps to quickly dissipate heat and reduce thermal stress during the casting process, thereby reducing casting defects (such as pores, shrinkage holes and cracks) and improving the quality and yield rate of castings.
Manufacturing casting auxiliary materials: Plate-shaped corundum is often used to manufacture casting auxiliary materials such as sliding nozzles and breathable bricks due to its excellent thermal shock resistance and erosion resistance. These auxiliary materials can ensure the smooth flow and discharge of molten metal during the casting process, while preventing defects such as pores and inclusions in the castings, thereby improving the quality of the castings.
Preventing sand from sticking to the surface of castings: Chromium ore sand is used to prevent sand from sticking to the surface of castings during casting. It has a good alkaline slag resistance and can effectively prevent the penetration of molten metal, thereby improving the quality of castings.
Enhancing the refractory performance of coatings: After grinding, chromium ore sand can be used as a refractory aggregate for casting coatings, significantly enhancing the refractory performance of coatings and ensuring the stability and safety of castings in high temperature environments.
Increasing the cooling rate: As a chilling material, chromium ore sand can increase the cooling rate of castings and prevent casting defects such as cracks and pores. It is particularly suitable for the manufacture of high-precision and high-performance castings.
