Strength and toughness.

    Mold working conditions are mostly very poor, some often bear a greater impact load, leading to brittle fracture. To prevent mold mold mold parts stop working when suddenly brittle fracture, die to have a high strength and toughness. Mold toughness depends on the carbon content of the material mold mold mold, grain size and organizational status.

    Corrosion resistance.

    Substance has physical and chemical properties of the chemical structure is by its own decision, as a rubber polymer material as well. Corrosion resistance depends entirely on the molecular structure of rubber and rubber nature of the substituent groups. Chemically aggressive media chemical structure can cause the rubber to react irreversibly, through addition, substitution or even a series of degradation reactions, decomposition of the rubber molecular structure, as well as the high loss of elasticity, loss of use value.

    All rubber at room temperature below 60% concentration of sulfuric acid have better resistance to. If the temperature reaches 70 ℃, sulfuric acid concentration of 70%, natural rubber, butyl rubber, chlorosulfonated polyethylene rubber, ethylene propylene rubber, and fluorine rubber are relatively stable. In addition to other types of plastic is not stable. If the rubber is in contact with more than 98% concentrated sulfuric acid or more than 80% of high-temperature sulfuric acid, the oxidation is fierce, this time only Viton relatively stable.

    Wear resistance.

    When the plastic deformation of the blank in the mold cavity, the cavity surface along both the flow and slide, so that the cavity surface of the blank generated intense friction between, which tends to lead to failure. Therefore, the wear resistance of the mold is the most basic, one of the most important performance.

    Hardness is a major factor affecting wear resistance. In general, the higher the hardness of the mold parts, the smaller the amount of wear, the better the wear resistance. In addition, the wear resistance of the material type, quantity, shape, size and distribution of carbides related.