Dry pressing powder mold in the process of work in addition to requiring its matrix with its high enough strength and toughness with a reasonable combination of its performance when used in the surface of its mold performance and service life is very important, Mold surface properties mainly refers to the wear resistance, corrosion resistance, friction coefficient, fatigue properties.
The improvement of the surface properties of the dry-pressed mold can be simply dependent on the improvement and improvement of the base material during the operation, and it is often possible to obtain a multiplier effect by the surface treatment technique during use, which is also Surface treatment technology is the rapid development of the reason.
The surface treatment technology of the dry pressed powder mold can pass the surface coating, the surface modification and the composite processing technology when it is used, so that it can effectively change the shape, chemical composition, organizational structure and mold surface of the mold surface to a certain extent Stress state, so that you can get to a certain extent, the required surface properties of systems engineering.
Dry pressed powder from the surface treatment methods, but also can be divided into: chemical methods, physical methods, physical and chemical methods and mechanical methods. Although new processing techniques are being developed to improve the surface properties of molds, nitrided, carburized and hardened film depositions are mostly used in mold making.
Dry powder pressed into the mold design is reasonable to increase the durability of the foundation. Therefore, in the design process of product forming in the adverse conditions to take effective measures to improve the durability of the mold, such as the design of small holes die life is often reflected in punching punches. For such molds, in the design should make small punch as short as possible to increase its length, while also using the guide sleeve method to strengthen the small punch to protect.