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  • Lost form casting processes

    Concepts and Characteristics 1. Introduction to lost form casting EVC technology is a method of bonding foamed plastic models similar in size and shape with the casting into model clusters, brushing refractory coating and drying, burying them in the dry quartz sand for vibration modeling, pouring...
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  • Study on the application of silica sol in investment precision casting

    Study on the application of silica sol in investment precision casting

    In the 1960s, silica sol began to be used in the field of casting, mainly as binder.It has been widely used in foundry industry because of its simple preparation process, low pollution and low cost.At present, silica sol is often used as binder in investment precision casting, which can guarantee...
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  • Analysis of defects of common lost mold casting process

    Analysis of defects of common lost mold casting process

    EPC process is different from traditional casting process and some casting defects are not seen in other molding process.The casting defects should be analyzed according to the characteristics of EPC technology, and the correct countermeasures should be taken. 1. Cast mold damage Mold damage is a...
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  • Causes analysis and prevention of shrinkage cavity and sag defects of cast iron

    Causes analysis and prevention of shrinkage cavity and sag defects of cast iron

    Shrinkage 1. Features: There are many small dispersed shrinkage holes in the casting, the surface is rough, and water seepage occurs during hydrostatic test. 2. Reason analysis: (1) Unreasonable process design.Influence of casting structure, shape and wall thickness.Too many isolated hot spots, t...
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  • Smelting technology of high-strength HT250 gray cast iron

    Smelting technology of high-strength HT250 gray cast iron

    Since its inception, gray cast iron has been widely used in the machinery industry due to its comprehensive performance superior to other materials. In particular, alloyed HT250 is mostly used in engine blocks, cylinder heads, and machine tools where there are special requirements. 1 Determinatio...
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  • Research progress of high strength grey cast iron material for automobile cylinder head

    Research progress of high strength grey cast iron material for automobile cylinder head

    1. Microstructure of high strength gray iron The strength of gray cast iron is mainly determined by its microstructure. Through the analysis of the transformation law of gray cast iron’s microstructure, the microstructure of high strength gray cast iron generally includes the following aspe...
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  • Lost Foam casting borrow cavity for runner study

    Lost Foam casting borrow cavity for runner study

    1. The casting system for the Lost Foam process is of solid foam type. During pouring, liquid metal will pass through quickly in the first place, which will be liquefied into colloidal shape in case of high temperature foam.Foam model gasification takes heat from the liquid metal.The casting temp...
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  • Application of technology to lost foam steel casting

    Application of technology to lost foam steel casting

    Lost Foam casting has the advantages of simple process operation, low material consumption cost, surface gloss knot, high dimensional accuracy, and less environmental pollution, etc., which gained great popularity and application in the late 1990s in China. However, there is not much successful e...
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  • Study on the composite casting process of vacuum lost mold Shell for nodular iron Pipe

    Study on the composite casting process of vacuum lost mold Shell for nodular iron Pipe

    Vacuum lost mold casting, also known as dry sand negative pressure lost mold casting process, or short for lost mold casting process, it is a new process based on the American solid mold casting technology patent in 1958, combined with the later vacuum seal molding technology research and develop...
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  • Current status and development trend of my country’s valve industry

    Current status and development trend of my country’s valve industry

    Valves are one of the indispensable fluid control equipment in all sectors of the national economy. They are used in large quantities, involve a wide range, and are complex in varieties. The quality of their quality and technical level are directly related to the safe production, economic benefit...
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  • Effect of Mixed Rare Earth on the Microstructure and Properties of Gray Cast Iron

    Effect of Mixed Rare Earth on the Microstructure and Properties of Gray Cast Iron

    Gray cast iron has good casting and many other excellent properties, but its mechanical properties are low. Adding rare earth elements to gray cast iron can improve the mechanical properties of gray cast iron, such as tensile strength, wear resistance, and hardness. At the same time, rare earth e...
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  • Production technology of high-quality gray cast iron

    Production technology of high-quality gray cast iron

    High-quality gray cast iron not only has high strength and hardness, but also has good cutting performance. The organization should be as uniform as possible, that is, evenly distributed, medium-sized A-type graphite; evenly distributed, medium or medium-fine pearlite matrix; as few inclusion par...
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