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 Brief introduction to alloy in the casting manufacturing

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megan2008
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Number of posts : 20
Registration date : 2013-10-26

PostSubject: Brief introduction to alloy in the casting manufacturing   Mon Nov 04, 2013 11:05 am

Alloy casting is a technoloy widely used in the investment casting manufacturers,grey iron casting manufacturers,steel casting manufacturers and so on.

An alloy is a mixture or solid solution composed ofmetals. An alloy will contain one or more of the three: a solid solution of the elements (a single phase); a mixture of metallic phases (two or more solutions); an intermetallic compound with no distinct boundary between the phases. Solid solution alloys give a single solid phase microstructure, while partial solutions give two or more phases that may or may not be homogeneous in distribution, depending on the thermal (heat treatment) history of the material. An intermetallic compound will have another alloy or pure metal embedded within another pure metal.

Alloys are used in some applications as their properties are superior to those of the pure component elements for those applications. Examples of alloys are solder, brass, pewter,phosphor bronze and amalgam.

Each of the metal alloys available for die casting offer particular advantages for the completed part.

Zinc - The easiest alloy to cast, it offers high ductility, high impact strength and is easily plated. Zinc is economical for small parts, has a low melting point and promotes long die life.

Aluminum - This alloy is lightweight, while possessing high dimensional stability for complex shapes and thin walls. Aluminum has good corrosion resistance and mechanical properties, high thermal and electrical conductivity, as well as strength at high temperatures.

Magnesium - The easiest alloy to machine, magnesium has an excellent strength-to-weight ratio and is the lightest alloy commonly die cast.

Copper - This alloy possesses high hardness, high corrosion resistance and the highest mechanical properties of alloys cast. It offers excellent wear resistance and dimensional stability, with strength approaching that of steel parts.

Lead and Tin - These alloys offer high density and are capable of producing parts with extremely close dimensions. They are also used for special forms of corrosion resistance.

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