The pressing film and the forging die are all working under high working pressure, and the surface layer of the abrasive tool is subjected to relatively severe powder friction during the work. Therefore, strict regulations should be clearly set for the mold material. The selection of mold materials is related to the quality of the blanks (such as: relative density, fineness, surface smoothness, etc.) and the service life of the abrasive tools and their safe production, production costs, and output rates. Therefore, the key drawing die should consider the following requirements: high toughness, high toughness and high wear resistance, high bending stiffness and small linear expansion coefficient, good quality quenching and tempering treatment characteristics and necessary ductility, good machining characteristic.
In order to increase the service life of abrasive tools, save high-quality alloy steel, and reduce the cost of manufacturing drawing die, abrasive tools for different main purposes, and different handicraft shapes, relative density and powdered raw materials should be used differently. Mold materials: For different mold parts, different mold materials and heat treatment methods are often used because of different working standards.
The female mold is a more critical part of the abrasive tool. Its work standards are very strict, and the production and processing are difficult to manufacture. The key requirements for raw materials are high toughness, high toughness, high wear resistance, fatigue reduction, and vibration resistance. , Usually use tungsten steel, front steel, high-alloy tool steel, low-alloy tool steel and carbon tool steel to manufacture. The core rod and the female mold have roughly the same working standards. They are usually manufactured with the same raw materials as the female mold, but they have good tensile strength and necessary ductility; the heat treatment hardness of the core rod is slightly less than that of the female mold, which is very long. Thin core rods are stipulated to have better ductility than short and thick core rods.
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