Foundry chill-molds are a type of casting mold used in metal casting processes to control the solidification rate of molten metal. These molds are made of high thermal conductivity materials such as copper or iron and are placed in specific locations within the sand mold to rapidly cool the molten metal as it solidifies. This rapid cooling process helps to refine the grain structure of the metal, resulting in improved mechanical properties such as increased strength and hardness. The use of foundry chill-molds is particularly important in the production of large, complex castings where uneven cooling rates can result in internal stresses and defects. By strategically placing the chill-molds in critical locations, foundries can ensure that the metal solidifies evenly and without defects. The design of the chill-molds can vary depending on the specific requirements of the casting, and can include features such as fins or channels to increase the cooling rate. While foundry chill-molds are effective in improving the mechanical properties of castings, their use can also result in increased production costs due to the additional materials and labor required. Additionally, improper placement or design of the chill-molds can result in casting defects and scrap, further increasing production costs. In summary, foundry chill-molds are an important tool in metal casting processes for improving the mechanical properties of castings through controlled solidification. Their use requires careful consideration and design to ensure optimal results.
metal casting, solidification rate, thermal conductivity, grain structure, mechanical properties
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