Difference between wrought aluminum alloy and cast aluminum alloy
Jan 13,2023
The fundamental difference between wrought aluminum alloy and cast aluminum alloy can be explained by the phase diagram of aluminum base binary alloy: the alloy with composition to the left of point B 'belongs to wrought aluminum alloy. When heated to a temperature higher than the solution line (BD), it can obtain single-phase α Solid solution, with good plasticity, 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 expanded to F point. The alloy with composition to the right of point E belongs to cast aluminum alloy. Because its structure contains eutectic with low melting point and good fluidity, it can prevent hot cracking and is suitable for casting. It can be seen that the composition content of cast aluminum alloy is higher than that of deformed aluminum alloy. Aluminum alloys can be divided into two types, which can be strengthened by heat treatment and can not be strengthened by heat treatment. The alloy with composition to the left of point D, whose solid solution composition does not change with temperature, has no phase change during heat treatment and does not undergo strengthening, is called non-heat treatment strengthened alloy; For the alloy with alloy composition between DF, the composition of its solid solution changes with temperature, that is, there is phase change during heat treatment, thus strengthening occurs, which is called heat-treatable strengthening alloy.
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