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  • Optimization design of large ductile iron casting process

    Optimization design of large ductile iron casting process

    1 Casting defects of large ductile iron parts Shrinkage hole, shrinkage porosity, slag inclusion, air hole, peeling, deformation and so on are common casting defects in sand casting of large ductile iron. These common casting defects are usually affected by the following factors. For large du...
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  • Mechanism and prevention of carbon increase on the surface of lost die casting steel

    Mechanism and prevention of carbon increase on the surface of lost die casting steel

    Surface carburization of steel castings by EPC has always been a controversial topic. A lot of experiments have been carried out on whether EPC is suitable for producing steel castings, especially low carbon steel castings. (1) the phenomenon and mechanism of carburization Surface carburization ...
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  • Application of rapid prototyping technology in investment precision casting

    Application of rapid prototyping technology in investment precision casting

    In recent years, with the gradual improvement of China’s market economy system and the rapid improvement of the country’s comprehensive strength, aerospace and national defense science and technology began to become the national key development industry. Space exploration, national d...
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  • Preventing methods of common casting defects of cast iron

    Preventing methods of common casting defects of cast iron

    1 Air hole Characteristics: The pores in the casting are the smooth holes of different sizes that exist on or near the surface of the casting. 1.1 Intrusive stomata The number of these pores is small and the size is large. They are pear shaped or spherical in some parts of the outer surface of th...
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  • Common defects and prevention methods of foaming mold used in EPC casting

    Common defects and prevention methods of foaming mold used in EPC casting

    In order to obtain high quality castings in EPC, it is necessary to have high quality EPC. The causes and prevention methods of common defects in foaming patterns are introduced. 1. The appearance is not complete and the outline is not clear Causes: (1) Insufficient bead quantity, incomplete fill...
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  • Preliminary study on lost mold casting technology

    Preliminary study on lost mold casting technology

    EPC technology, referred to as “the EPC, also known as gasification casting or mold casting, is the traditional wooden and other regular shape to switch to plastic foam shape instead of an entity, a firm of modelling, this kind of casting method, after making good blank, don’t remove ...
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  • New development of feeding riser for ductile iron

    New development of feeding riser for ductile iron

    The performance of ductile iron castings depends on the properties determined by the microstructure on the one hand, such as the number of graphite spheres, the rate of spheroidization and the metal matrix, and on the presence of macroscopic and microscopic shrinkage holes in the castings on the ...
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  • Process control of silica sol casting

    Process control of silica sol casting

    Silica sol casting refers to the casting method that is made of fusible material, coated with several layers of refractory material to make molded shell, melted out of shape after high temperature roasting, and can be cast. The process of silica sol casting: 1. Mold Manufacturing A die is a mold ...
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  • Microstructure analysis of silicon sol investment casting shell

    Microstructure analysis of silicon sol investment casting shell

    High quality precision castings with smooth surface and clear edges and corners need to be manufactured by high quality investment casting shell.In the process of investment casting shell making, silica sol has become a common water-based binder in investment casting because it does not need chem...
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  • Application of silica sol in precision casting

    Application of silica sol in precision casting

    Precision casting is the development direction of modern industrial forging, no cutting, high surface finish, high precision and other complex parts and assemblies that are difficult to process The manufacturing technology has created a broad application prospect;The military and aerospace produc...
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  • Quality control of silica sol coating for investment precision casting

    Quality control of silica sol coating for investment precision casting

    In the process of ensuring casting quality, in addition to the formulation of reasonable and scientific manufacturing technology, it is more important to strictly control the quality of silica sol coating, so as to ensure the quality of casting.Through the strict control of coating parameters, co...
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  • Application of precision casting technology in production

    Application of precision casting technology in production

    There are many kinds of precision casting process, mainly including investment casting technology, metal mold casting technology, pressure mold casting technology, lost mold casting technology, etc., but the most commonly used is investment casting technology.Through the comparison and analysis o...
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