Graphite Block For Metal Casting

This chapter presents graphite blocks for metal casting, which have unique properties and are an indispensable core material in the metal casting industry. Its advantages are as follows:

1. Graphite blocks have extremely strong high temperature resistance and can maintain structural stability even at a metal pouring temperature of 1600°C. Therefore, graphite molds made of graphite blocks are not easy to deform or crack. In addition, graphite blocks have a low thermal expansion coefficient and can withstand repeated thermal shocks while maintaining dimensional accuracy. They are suitable for precision castings such as aluminum alloys and high-temperature alloys.

2. Graphite blocks have excellent thermal conductivity, which ensures that the molten metal can be cooled quickly and evenly. In the die-casting process, graphite molds made of graphite blocks can increase the solidification rate in conjunction with a water cooling system, thereby achieving the effect of improving the mechanical properties of the casting. In addition, its excellent self-lubricating property can reduce the use of release agents and reduce the porosity defect rate on the surface of castings.

3. The chemical inertness of graphite blocks can effectively isolate the oxidation of molten metal and reduce metal oxidation loss in copper alloy casting. The high-purity graphite blocks formed by isostatic pressing have a longer service life.

The application value of graphite blocks for metal casting is extremely high, especially in the production of high-end castings such as automobile engine blocks and aviation turbine blades. Its use helps to improve the quality and efficiency of castings.

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