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                                                         Investment  precision casting process and advantages









Investment precision casting process: firstly, it is necessary to select the appropriate investment material to make the investment mold; then repeat the refractory coating and the refractory sand process on the investment mold, harden the shell and dry; then melt the internal melting mold to obtain Cavity; calcined shell to obtain sufficient strength, and burn off residual investment material; cast the required metal material; solidification and cooling, sanding after shelling, to obtain high-precision finished products. The advantages of investment precision casting process: it is not only suitable for casting of various types and various alloys, but also produces castings with dimensional accuracy and surface quality higher than other casting methods, and even other casting methods are difficult to cast complex and resistant. Castings that are high-temperature and not easy to process can be cast with good investment castings.

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                                                                   Factors affecting the surface roughness of stainless steel castings Surface roughness is another major quality indicator for stainless steel castings , generally less than 3.2 μm, between 0.8 and 3.2 μm. There are many factors affecting the surface roughness of castings, such as the pressure type, the surface quality of the investment and stainless steel, the casting process, the type of alloy and other factors. (1) Profile and investment surface quality. The surface roughness of the investment mold is the most important part affecting the surface roughness of the casting, and it is related to the surface quality of the molding, the compression molding method and the pressing process parameters. (2) Stainless steel surface quality. Stainless steel is a columnar columnar structure network, and refractory materials, additives, and water are filled in the middle, so that there are pores of different sizes on the su
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