Classification of mold materials
According to the different conditions of use, mold materials can be divided into several categories, such as cold working mold materials, hot working mold materials, plastic mold materials and other mold materials, each category is divided into several sub-categories.
Cold working mold materials are widely used, and their main performance requirements are strength, hardness, toughness and wear resistance. In recent years, the use of carbon tool steel has become less and less, and the proportion of high alloy steel molds is high. Cold die steels are mainly high carbon alloy steels, all of which are heat-treated reinforced section steels with a hardness higher than 58HRC. Low-alloy cold-worked die steel, usually 9CrWMn, is generally only used for simple dies and low-impact trial dies for small batch production. Cr12 type high carbon alloy steel is a common material for most molds. This steel has higher strength and wear resistance and lower toughness.
The serialization of hot mold materials is generally not as complete as that of cold mold materials, except for a few types of materials with particularly large amounts. When selecting hot mold materials, mechanics should consider both thermal strength and crack resistance.
Due to the diversity of working conditions, manufacturing methods, precision and durability requirements of plastic molds, the composition of steel for plastic molds is very wide, and various high-quality steels are available, and a wide range of plastic molds have been formed. material series.
Other mold materials include casting mold steel, non-ferrous alloy mold materials, glass mold materials, special new mold materials and so on.
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