When the material of the roadside stone brick is plastically deformed by the pressure in the cavity of the mold, the surface of the cavity flows and slides along the surface of the cavity, causing severe friction between the surface of the cavity and the material, thereby causing the mold to fail due to wear. Therefore, the wear resistance of the material is one of the most basic and important properties of the mold. Hardness is a major factor affecting wear resistance. In general, the higher the hardness of the mold part, the smaller the wear amount, and the better the wear resistance. In order to prevent the mold parts from suddenly breaking during production, the mold must have high strength and toughness. Carbon content and grain size are the criteria for considering the toughness of materials.
The roadside stone brick machine production line is a cyclic process, and the mold often causes fatigue fracture under the long-term effect of cyclic stress. It can be divided into small energy multiple impact fatigue fracture, tensile fatigue fracture, contact fatigue fracture and bending fatigue fracture. The fatigue fracture properties of the mold depend mainly on its strength, toughness, hardness, and the amount of inclusions in the material. When the working temperature of the mold is high, the hardness and strength are lowered, resulting in early wear of the mold or plastic deformation and failure. Therefore, the mold material should have high high temperature resistance to ensure that the mold has high hardness and strength at the working temperature.