How to prepare stainless steel precision casting coating

The following is the formulation of stainless steel precision casting coating:

Stainless steel precision casting refers to the general term for the process of obtaining castings with precise dimensions. Compared with the traditional sand casting process, precision casting obtains castings with more accurate dimensions and better surface finish. It includes investment casting, ceramic casting, metal casting, and pressure casting and lost foam casting.

The surface coating of stainless steel precision casting determines the surface quality of the casting, so the coating quality is required, the silicon powder is fine, the coating viscosity should not be too high, and the sand removal should be refined. The reinforcement layer coating can strengthen the shell and prevent damage to the shell. Therefore, Thicker silica powder can be used, the paint viscosity is high, and the sand removal granularity is large.

Preparation method: First, add the dry materials quantitatively into the mixing barrel, and then stir continuously. Add the human body powder materials one by one. After adding, continue stirring for more than 15 minutes until the powder materials become a uniform suspension and let it stand. It can be used after a period of time. Coating paint generally adopts dip coating method.

According to the different layers of the mold shell, the coating can be divided into a surface layer and a reinforcement layer. The refractory coating for stainless steel precision casting is a suspension made of powdered refractory materials (silica powder, corundum powder), ethyl silicate hydrolyzate or water glass solution. liquid.