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  • Solving the common defects of sand and slag in vanishing mold

    Solving the common defects of sand and slag in vanishing mold

    In vanishing mold products, common defects mainly include sand inclusion and slag inclusion. In order to solve the defects of sand inclusion and slag inclusion, it is necessary to systematically and comprehensively analyze the causes of the defects, so as to better develop corresponding measures....
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  • Analysis of Defects of Investment Casting

    Analysis of Defects of Investment Casting

    Investment casting is characterized by complex process, many processes, many factors affecting casting quality and various raw and auxiliary materials. It is not easy to control the quality of investment casting and affects the quality of casting to different degrees. 1. Casting dimension is out ...
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  • Discussion on common defects of steel castings in EPC and prevention measures

    Discussion on common defects of steel castings in EPC and prevention measures

    1. Carburization defect Produces the main reason for the increased carbon defects: bubble shape material is mainly composed of carbon and hydrogen, sharp break down under the high temperature liquid steel, hydrogen and free of carbon, due to the strong affinity ability is carbon, hydrogen and oxy...
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  • Causes and preventive measures of porosity defects in castings

    Causes and preventive measures of porosity defects in castings

    Bore hole is a common casting defect, its shape is generally spherical, oblate or strip.The reason for the formation of pores is that the local gas pressure in a certain part of the casting exceeds the metal pressure when the metal liquid solidifies.Gas always flows along the path of least resist...
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  • The process research and effect comparison of EPC and sand casting are analyzed

    The process research and effect comparison of EPC and sand casting are analyzed

    1. Process, effect and prospect of EPC (1) What is lost mold casting process: lost mold casting process is known as solid mold casting, vaporization mold manufacturing, invented by the United States Sroll and obtained a patent in 1958, at the beginning of the process for the production of arts an...
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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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