Classification Of Cast Aluminum Alloys

Classification of cast aluminum alloys
The process of casting aluminum alloy can directly obtain the aluminum alloy of a component. In this case, the content of alloy elements in this type is generally higher than that of deformed aluminum alloys. So what is the specific situation regarding the classification of cast aluminum alloys?
The main research content is as follows:
1. Al Si alloy, also known as "Si Al" or "Si Al". In the cast aluminum alloy, the casting performance and wear resistance are good, the type and amount of coefficient of thermal expansion small alloy are large, and the silicon content is 4%~13%. Sometimes 0.2% to 0.6% magnesium is added to silicon aluminum alloy, which is widely used in structural components such as shells, cylinders, boxes, and frames. Sometimes copper and magnesium are added to improve the mechanical properties and heat resistance of the alloy. This alloy is widely used in the manufacturing of components such as pistons.
2. Aluminum copper alloy and copper alloy with a content of 4.5%~5.3% have excellent strengthening effects. Proper addition of manganese and titanium can improve room temperature, high-temperature strength, and casting performance. Mainly used for manufacturing sand castings with large dynamic and static loads and simple shapes.
3. Aluminum magnesium alloy, a cast aluminum alloy with low density (2.55g/u002Fcm3) and high strength (about 355MPa), containing 12% magnesium, with good strengthening effect. This alloy has good corrosion resistance in the atmosphere and seawater, and has good comprehensive mechanical properties and processability at room temperature. It can be used as parts such as radar bases, aircraft engine shells, propellers, landing gears, and also as decorative materials.
4. Al Zn alloy is often added with silicon and magnesium to improve its working performance, which is often called "zinc Silumin". Under the conditions of casting technology, this alloy has the main function of quenching, that is, "self quenching". Castings can be used without heat treatment methods to achieve high strength after modification and heat treatment. After stabilization treatment, the size is relatively stable and is commonly used for designing and making models, templates, and equipment problem brackets.
In addition to strain strengthening, cast aluminum alloys have the same alloy system and strengthening mechanism as deformed aluminum alloys. The main difference between them is that the high content of alloy element silicon in cast aluminum alloys exceeds that in most forged aluminum alloys. In addition to enhancing elements, cast aluminum alloys should contain sufficient eutectic elements, usually silicon, to provide an alloy with sufficient fluidity to fill the shrinkage gap of the casting. At present, there are only 6 basic types of alloys; 1ai cu alloy, 2ai cu si alloy, 3ai si alloy, 4ai mg alloy, 5ai zinc mg alloy, 6Ai sn alloy.