Characteristics of Cast Aluminum Alloys

Rising Dragon Stainless Steel Company has always focused on the processing and production of aluminum alloys. It can use aluminum alloy materials to provide customers with services such as doors, windows, and awning production. However, many customers do not understand the characteristics of cast aluminum alloys. Now Rising Dragon Stainless Steel Company popularizes the following cast aluminum alloys‘ features:

Cast aluminum alloy is an aluminum alloy used to directly cast mechanical parts of various shapes. According to the main added elements, they can be divided into Al-Si alloys, Al-Zn alloys and Al-Mg alloys. Each system has its own brand, which is more complicated. [2]

the difference

The fundamental difference between deformed aluminum alloys and cast aluminum alloys can be explained by the phase diagram of aluminum-based binary alloys: alloys with components to the left of point B' belong to deformed aluminum alloys. When heated to a temperature higher than the solid solution line (BD), they Single-phase α solid solution can be obtained, which has good plastic processing properties and is suitable for cold and hot pressure processing. Due to the development of melting and casting technology, the composition of some deformed aluminum alloys has been expanded to point F. Alloys with components to the right of point E are cast aluminum alloys. Because its structure contains low-melting-point eutectic, it has good fluidity and can prevent hot cracking, making it suitable for casting. It can be seen that the component content of cast aluminum alloy is higher than that of deformed aluminum alloy. Aluminum alloys are divided into two categories: those that can be strengthened by heat treatment and those that cannot be strengthened by heat treatment. For alloys with components to the left of point D, the composition of the solid solution does not change with changes in temperature. There is no phase change during heat treatment and no strengthening occurs. It is called a non-heat treatment strengthened alloy. For alloys with alloy components between DF, the solid solution of The composition changes with temperature, that is, there is a phase change during heat treatment, thus strengthening occurs, which is called a heat-treatable strengthened alloy.