Aluminium alloy is the most widely used in industry of a class of non-ferrous metal structure material, in aviation, aerospace, automotive, machinery manufacturing, shipping and the chemical industry has a large application. The density of pure aluminum small (ρ = 2.7 g/cm3), low melting point (660 ℃), aluminum is face heart cubic structure, it has high plastic (delta: 32 ~ 40%, ψ: 70 ~ 90%), easy processing, can be made into all profiles, the plank. Corrosion properties is good; But the strength of the pure aluminum is very low, annealing state sigma b value is about 8 KGF /, it should not be as was the structural materials. Through the long-term production practice and scientific experiments, people gradually to join alloy element and using the method such as heat treatment is to strengthen the aluminum, this will be a series of aluminum alloy.
The aluminum alloy material preparation, added 8% Cu as metal, after 11 hours into solid solution treatment; Test hardness in again after play 2-9 hours, finally obtained the aging treatment of the test samples. Through the test its hardness, get the sample aging treatment time and hardness relations; And then after the polishing and grinding smooth, get observable corrosion treatment the microstructure of samples, observe the analysis of metallographic organization structure, can be concluded that the internal organization; And get the related properties of the conclusion.【这个可能会专业点、】