Marine aluminum alloy plate selection standard
The ship is an indispensable type of transportation. The load of the ship is the largest mode of transportation. The international cargo is all supported by ships. Marine aluminum alloy is one of the emerging fields of aluminum alloy products, and it is also the key direction for the transformation and upgrading of many aluminum processing enterprises in China.
Marine aluminum alloy material is more strict
The selection of marine aluminum alloy is more stringent. At present, more than 5083 aluminum plate and 6061 aluminum plate are used. In practical applications, the advantages of marine aluminum alloys are very obvious. Firstly, the specific gravity is small, which can reduce the weight of the ship, save energy and increase the load; secondly, it is good in corrosion resistance, reducing the cost of oiling and extending the service life; the third is the welding and processing formability number, which is beneficial to the later processing; The waste is easy to recycle and can be recycled. At the same time, it does not burn and is safe in case of fire.
Marine aluminum alloy has high strength
Marine aluminum alloys must have high specific strength and specific modulus. The structural strength and size of the ship are closely related to the yield strength and elastic modulus of the material. Since the elastic modulus and density of the aluminum alloy are substantially the same, the addition of alloying elements also affects. Very small, so increasing the yield strength within a certain range is effective in reducing the structure of the ship. High-strength 6061 aluminum alloy are often difficult to have both excellent corrosion resistance and weldability. Therefore, marine aluminum alloys are generally medium strength, corrosion resistant weldable alloys.
Welding performance of marine aluminum alloy
Marine aluminum alloys must have excellent welding properties. At present, the main method used in the ship is the automatic argon arc welding method. Good weldability means that the tendency of the aluminum alloy to form cracks during welding is small, that is, the aluminum alloy has good welding crack resistance. The lost weldability cannot be restored by reheating under shipbuilding conditions.
Marine aluminum alloy should have corrosion resistance
Marine aluminum alloys must have excellent corrosion resistance, and the ship's structure is used in many harsh seawater media and marine environments. Therefore, corrosion resistance is one of the main signs of marine alloys. At the same time, marine aluminum alloy has good cold and hot forming properties. Because the ship is manufactured by cold processing and hot processing, the marine aluminum alloy must be easy to process, no crack defects, and can still meet the strength and strength after processing. Corrosion resistance requirements.
In summary, marine aluminum alloys are used in marine vessels and other fields, so they have more stringent process requirements and performance standards than other common aluminum alloy products.
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