Layering thickness of as influenced by the surface quality, precision casting surface quality of the product along with the peak, with the decrease of the thickness of layered surface quality began to decline, reduced to roughness.Reason analysis, it is because of its high layer thickness, the decrease of the thickness of layered weaken the unit cell to longitudinal bonding silhouette of the phenomenon of "sawtooth", so as to improve the surface quality of the precision casting von berg systeme;And layer thickness is small, continue to reduce would have resulted in a unit cell adhesive lateral diffusion, it reduces the surface quality of von berg systeme.Therefore, must be guaranteed under the premise of necessary strength, choose suitable thickness of layered, von berg systeme surface quality of the best.