What Materials Are Needed For Investment Casting?

1, Molten metal
The main feature of investment casting is to use low melting point alloys for casting, in order to achieve high-precision casting. Molten metals generally use copper based alloys, aluminum based alloys, nickel based alloys, etc., which are characterized by low melting point, good fluidity, low coefficient of thermal expansion, and high hardness.

2, Molded materials
Investment mold materials are materials used to make investment molds, and their quality directly affects the forming quality of investment casting. The commonly used investment materials include gypsum, silicate, wax, etc. Among them, wax mold is one of the most widely used investment materials in investment casting, with excellent characteristics such as low melting point and high fluidity.

3, Coatings
Coatings are materials used to apply on the surface of investment molds, and their main function is to prevent molten metal from invading the surface of the investment mold and increase its hardness. The commonly used coatings mainly include silicate coatings, persimmon powder coatings, graphite coatings, etc. Among them, silicate coatings have the characteristics of good non adhesion and high temperature resistance, making them one of the most commonly used coatings in investment casting.

Overall, the raw materials of investment casting have characteristics such as low melting point, high fluidity, and low coefficient of thermal expansion, which is also one of the important reasons why investment casting can achieve high-precision casting. In addition, the quality of investment materials and coatings in investment casting is directly related to the quality and forming accuracy of the finished product. Therefore, the selection of materials and coatings is very important in the investment casting process.