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Common methods of copper casting

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Common methods of copper casting

Release date:2019-09-21 14:41 source:Original click:

 Casting copper parts are usually filled into the mould cavity by liquid metal casting at low or high speed. Mould has movable cavity surface. With the cooling process of liquid metal forging under pressure, not only shrinkage defects of the blank are eliminated, but also the internal structure of the blank reaches the broken grains as forged. The comprehensive mechanical properties of the blank have been significantly improved. Then the commonly used methods of casting copper parts are as follows:

  1. In copper alloy casting, metal mould casting is usually used to accelerate the solidification of the alloy, which plays an important role in improving casting quality and reducing casting defects. Metal mold casting can subdivide grains, reduce pore size, improve mechanical properties and air tightness of the alloy. In copper alloys with high lead content, such as lead bronze, metal mold casting can prevent the segregation of copper composition. Because there are many cylindrical parts in copper alloy castings, centrifugal casting method is used more.

  2. Centrifugal casting is the technology and method of injecting liquid metal into the high-speed rotating casting mould to make the liquid metal move centrifugally to fill the casting mould and form the casting. Because of centrifugal movement, liquid metal can fill the mould well in the radial direction and form the free surface of the castings; cylindrical inner holes can be obtained without core; gas and inclusions can be eliminated in liquid metal; metal crystallization process can be affected, thus improving the mechanical and physical properties of the castings.

  In terms of casting methods, besides sand casting, low pressure casting can be used for large-scale copper castings and other non-ferrous alloys in order to improve the density of the alloy and reduce the inclusions in the casting process.

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