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Application of cast aluminum magnesium (Al-Mg) alloy

2015年10月18日 字體:
Application of cast aluminum magnesium (Al-Mg) alloy

The mass fraction of Mg in Al-Mg alloy is 4%~11%, the system has small density, and has high mechanical properties, excellent corrosion resistance, good machining performance, and bright and beautiful surface. However, due to the complexity of the alloy melting and casting process, in addition to used as a corrosion resistant alloy, it is also used as decorative alloy. The characteristics and applications of common cast Al-Mg alloys are as follows.

(1) ZL301 alloy ZL301 alloy with high strength, good elongation, excellent cutting performance, good welding, can be positive, in the earthquake, the shortcomings of the ZL301 alloy is a high load, working temperature at 150 degrees Celsius, and in the atmosphere and sea water corrosion resistance of high parts, such as frame, bearing, rod and accessories, etc..

(2) of zl303 alloy zl303 alloy resistant corrosion resistance, good weldability, good cutting performance, easy polishing, casting performance passable, low mechanical properties, cannot be strengthened by heat treatment, shrinkage hole inclination, widely used in die casting. This kind of alloy is mainly used for in cold air and the operating temperature does not exceed 200 degrees Celsius degrees in corrosion medium load parts or parts, such as sea wheel parts and machine shell.

(3) ZL305 alloy ZL305 alloy is added to Al-Mg alloy on the basis of Zn, which can improve the mechanical properties of the alloy and reduce the oxidation, porosity and porosity of the alloy. At present, this kind of alloy is mainly used to bear high load, working temperature at 100 degrees Celsius, and in the atmosphere or water in the work of the requirements of high corrosive parts, such as parts in marine vessels.

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