Compared with other metal materials, aluminum and aluminum alloy have the following characteristics: 1. Low density The density of aluminum and aluminum alloy is close to 2.7g/, which is about 1/3 of iron or copper. 2. High strength: High strength of aluminum and aluminum alloy. After a certain degree of cold working, the strength of the matrix can be strengthened, and some grades of aluminum alloy can also be strengthened by heat treatment. 3. Good electrical and thermal conductivity The electrical and thermal conductivity of aluminum is second only to silver, copper and gold. 4. The surface of aluminum with good corrosion resistance is easy to naturally produce a dense and firm AL2O3 protective film, which can well protect the substrate from corrosion. Through artificial anodizing and coloring, cast aluminum alloys with good casting properties or deformed aluminum alloys with good plasticity can be obtained. 5. After adding certain alloying elements to easy processing, casting aluminum alloy with good casting performance or deformed aluminum alloy with good plasticity can be obtained.
