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Dewaxing casting is a precision casting with cost-effective production methods. Dewaxing casting is compatible with a wide range of materials, including carbon steel, chromium-molybdenum steel, tool steel, wear-resistant and heat-resistant steel, stainless steel, superalloys like Monel and Hastelloy, nickel-cobalt alloys, high chromium cast iron, aluminum alloys, copper alloys, and titanium alloys. According to international standards, dewaxing casting specifications include dimensions up to 200 × 200 × 300 mm and a maximum weight of 10 kg.
Lost-wax casting, also known as investment casting, is a manufacturing process that uses wax patterns to create complex metal parts. The technology's outstanding dimensional accuracy, smooth surface finish and intricate detail make dewaxing casting ideal for producing complex and high-precision parts. The lost wax process removes the wax pattern, leaving a cavity filled with molten metal to form the final part. This dewaxing casting method is widely used in industries such as aerospace, automotive and marine due to its ability to produce complex and high-quality parts.
The purpose of dewaxing is to remove the wax pattern from the ceramic shell mold before the molten metal is poured in during the casting process.
Traditional casting methods, such as sand casting or die casting, do not typically involve the dewaxing process. In sand casting, a mold is created using a compacted sand mixture that is shaped around a pattern. Once the mold is formed, molten metal is poured directly into the mold cavity, and there is no need to remove any wax. Similarly, in die casting, molten metal is injected under high pressure into a steel mold, and there is no wax pattern involved. In contrast, dewaxing casting specifically refers to the process used in investment casting, also known as the lost wax casting method. In investment casting, a wax pattern is used to create the mold cavity, and the dewaxing process involves removing this wax pattern from the ceramic shell mold before the final casting is made. This dewaxing casting technology allows for the creation of intricate and complex parts with high precision and detail. Therefore, the main difference lies in the use of wax patterns and the need for a dewaxing step in investment casting, which is not a part of traditional casting methods like sand casting or die casting.
The dewaxing casting materials commonly used include Wax; Ceramic slurry; Refractory materials; Crucibles; Investment powder; Binder material; and Metal alloys.
The advantages of dewaxing casting, also known as the lost wax process or investment casting, include Complex shapes; High precision; Material versatility; Reduced need for machining; Design flexibility; Minimal material waste; and Smooth surface finish.
Some industries where dewaxing casting is commonly used include Aerospace; Automotive; Medica; Jewelry; Industrial machinery; and Energy.
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