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Factors Influencing the Appearance Quality and Internal Qual

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Factors Influencing the Appearance Quality and Internal Qual

Release date:2019-09-19 13:52 source:Original click:

  The first is to have a reasonable casting process. That is to say, according to the structure, weight and size of copper castings, casting alloy characteristics and production conditions, proper parting surface and moulding and core-making methods are selected, and casting bars, chills, risers and gating systems are reasonably set up. To ensure the quality of castings.

  The design technicality of the second copper castings. In order to avoid or reduce the composition of copper castings, the rationality of design must be considered from the point of view of casting alloy and casting process characteristics, i.e. obvious size effect, solidification, shrinkage and stress, in addition to determining the geometrical shape and size of castings according to working conditions and properties of metal materials. Defects such as segregation, deformation and cracking occur.

  The third is the quality of raw materials for foundry. Metal furnace charge, refractory material, fuel, flux, modifier, casting sand, moulding sand binder, paint and other materials are not up to standard, which will cause defects such as porosity, pinholes, slag inclusion, sand bonding and so on, which will affect the appearance and internal quality of copper castings, and will cause castings to be scrapped in serious cases.

  Fourthly, the process operation should be formulated to improve the technical level of workers so that the process regulations can be implemented correctly.

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