Four different alloying elements in casting aluminum parts

(1) Aluminum-silicon based alloy, also called silicon-aluminum. Its casting performance and abrasion resistance are very good, not only has a small thermal expansion coefficient, but also a variety of cast aluminum parts, meanwhile, its alloy content is yes, containing 11% to 24% silicon content . Magnesium-containing silicon-aluminum parts are also added at 0.3% to 0.5%, and are widely used in structural parts such as boxes, shells and frames. There are also appropriate amounts of copper and magnesium, which will improve the mechanical properties and heat resistance of the alloy.

(2) Aluminum-copper alloy. Its strengthening effect is 4.6% to 5.2% of copper-containing alloy. If manganese and titanium are added properly, the room temperature, high temperature strength and casting performance can be significantly improved. Generally, it is mainly used in the manufacture of sand castings with large dynamic or static loads and simple shapes.

(3) Aluminum-magnesium alloy, its strengthening effect is yes, not only has a smaller density, but its cast aluminum parts are also strong, at the same time, it contains 12% magnesium. In the atmosphere and seawater, the alloy has good corrosion resistance. At general temperatures, it has good comprehensive mechanical properties and machinability. It is generally used for parts such as propellers and aircraft engine cases. Decoration materials.

(4) Aluminum-zinc alloys, which often contain silicon and magnesium elements, in order to improve its performance. Such alloys have a quenching effect under casting conditions. It generally does not require heat treatment during use. After the modification heat treatment, the strength of the casting will become higher. And after a certain stabilization process, its size is very stable.