Aluminum production in nonferrous metal is going to occupy the first place, and the inferior to steel production. Aluminum so widely used, in addition to having rich reserves (about 8.2% for the crust quality, the most widely distributed metal elements in smelting), more convenient, more important is the aluminum has a series of excellent properties.
Extruded aluminium heatsink
The advantages and disadvantages of extruded aluminium heatsink in alkali corrosion of distinction, such as alkali corrosion parts surface have too much black film, or red membrane. The extruded aluminium heatsink is necessarily containing silicon or copper containing high aluminum, the aluminum chemical conversion film on the shortening of time, otherwise the film is difficult to meet the electrical requirements. Therefore, according to different oxidation of aluminum, it masters different. To do this, different types of aluminum parts are not allowed in the same string banding, lest it cannot control their proper oxidation time. Different types of aluminum by conductive chemical conversion treatment, exterior color difference formula is different than other the oxide film differences are more significant. High purity aluminum, film forming speed is slow; aluminum purity low, contrary.
Effect of cold deformation on aluminum profile
After cold deformation, due to crystal and crystal appeared between the microscopic cracks or macro crack, fissure cavity defects, so that aluminum density. Intergranular substances which damage the grain direct contact, the grain orientation of ordering, intergranular and intragranular fracture, the resistance variation has obvious effect. The aluminium profile makes resistance with the degree of deformation increases, the latter. After cold deformation, material can be increased, so that its chemical properties more unstable and prone to corrosion, especially prone to stress corrosion. Aluminum by cold deformation, due to the occurrence of grains and intergranular failure, lattice distortion and appeared to have second kinds of residual stress, the plasticity index decreased dramatically, under extreme conditions may be close to complete brittle state; on the other hand, because of the lattice distortion, dislocation, grain was increased the elongated thinning and the emergence of structure, and its intensity index is improved, namely the work-hardening. Aluminum by the relatively large deformation, due to the appearance of the material exhibits anisotropic texture. For example, aluminum alloy sheet in deep drawing is easy to appear the obvious earing. Should reasonable control of processing conditions in order to make full use of the favorable aspects of texture and anisotropy, and avoid or eliminate its negative aspects.
www.aluminiumsupplier.com.cn was established in 1984. As one of the earliest enterprises engaged in aluminium profile in Mainland China, the Company has become a famous and large-scaled enterprise specialized in production of aluminium profiles for both architecture and industry, with its yearly capacity of 150,000 tons.
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