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  • What Is The Casting?
    Jun 14, 2018

    What is the Casting?

     

    Castings are metal-molded articles obtained by various casting methods. That is, the smelted liquid metal is injected into a previously prepared mold by casting, injection, inhalation or other casting methods, and after cooling, it is polished and other subsequent processing means. The resulting shape, size and performance of the object.

     

    Foundry Ductile Iron Gray Iron Casting Parts.jpgThere are many classification methods for castings. According to their different metal materials, they can be divided into steel castings, cast iron parts, cast copper parts, cast aluminum parts, cast magnesium parts, cast zinc parts, and titanium casting parts. Each type of casting can be further divided into different types according to its chemical composition or metallographic structure. Such as iron castings can be divided into gray iron castings, ductile iron castings, vermicular cast iron castings, malleable cast iron castings, alloy cast iron castings, etc.; According to the different molding methods, castings can be divided into ordinary sand castings, metal castings, die castings , Centrifugal castings, continuous castings, investment castings, ceramic castings, electroslag remelting castings, bimetal castings, etc. Among them, ordinary sand castings are the most widely used, accounting for about 80% of the total casting output. Non-ferrous metal castings such as aluminum, magnesium, and zinc are mostly die castings.


    However, the liquid metal forming process is numerous and difficult to control precisely, making the casting quality unstable. Compared with the forgings of the same kind of material, due to the loose structure of the liquid molding and the coarse grains, defects such as shrinkage holes, shrinkage, porosity and the like are easily generated inside. Its mechanical properties are low. In addition, labor intensity is great and conditions are poor. With excellent mechanical and physical properties, it can have a variety of different strength, hardness, toughness with the overall performance, but also have one or more special properties, such as wear, high temperature and low temperature, corrosion resistance and so on.

     

    The use of castings is very extensive, and it has been applied to the hardware and the entire machinery and electronics industry, and its use is expanding. Specific use, construction, hardware, equipment, construction machinery and other large machinery, machine tools, ships, aerospace, automobiles, motorcycles, electronics, computers, electrical appliances, lighting and other industries