How to prepare stainless steel precision casting coating

The preparation of stainless steel precision casting coating is as follows:

Stainless steel precision casting refers to the general term for the process of obtaining precision-sized castings. Compared with the traditional sand casting process, precision casting castings have more accurate dimensions and better surface finish. Including investment casting, ceramic casting, metal casting, pressure casting and disappearing Mold 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 cannot be too high, and the sand should also be finer. The steel bar coating can strengthen the shell and prevent damage to the shell. Therefore , thicker silica powder can be used, the coating viscosity is higher, and the particle size of the sand is also larger.

Preparation method: First, add the dry material into the mixing barrel quantitatively, and add the powder materials one by one under continuous stirring. After adding, continue stirring for more than 15 minutes until the powder material becomes a uniform suspension, and let it stand for a while. Ready to use. Dip coating is generally used for coating.

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