The aluminum rod is melted and extruded to obtain aluminum materials with different cross-sectional shapes. The production process of aluminum profiles mainly includes three processes: casting, extrusion and coloring. Among them, the coloring mainly includes: oxidation, electrophoretic coating, fluorocarbon spraying, powder spraying, wood grain transfer and other processes.
Aluminum profile features:
(1) Corrosion resistance;
The density of aluminum profile is only 2.7g/cm3, which is about 1/3 of the density of steel, copper or brass (7.83g/cm3, 8.93g/cm3, respectively). Under most environmental conditions, including air, water (or salt water), petrochemicals and many chemical systems, aluminum can show excellent corrosion resistance.
(2) Conductivity;
Aluminum profile is often selected because of its excellent electrical conductivity. On the basis of equal weight, the conductivity of aluminum is nearly twice that of copper.
(3) Thermal conductivity rate;
The thermal conductivity of aluminum alloy is about 50-60% of copper, which is beneficial to the manufacture of heat exchangers, evaporators, heating appliances, cooking utensils, and automobile cylinder heads and radiators.
(4) Non-ferromagnetic;
Aluminum profiles are non-ferromagnetic, which is an important feature for the electrical and electronic industries. Aluminum profiles are not spontaneously combustible, which is important for applications involving handling or contact with flammable and explosive materials.
(5) Machinability;
The machinability of the aluminum profile is excellent. In various deformed aluminum alloys and cast aluminum alloys, as well as in the various states these alloys have after being produced, the machining characteristics vary considerably, which requires special machine tools or technologies.
(6) Formability;
The specific tensile strength, yield strength, ductility and corresponding work hardening rate dominate the change in allowable deformation.
(7) Recyclability;
Aluminum has extremely high recyclability, and the characteristics of recycled aluminum are almost the same as primary aluminum.