1, is the first process of production of aluminum casting. The main process is:
(1) batching: according to the needs of the production of specific alloy grade, calculated the addition of various alloy ingredients, reasonable collocation of various raw materials.
(2) smelting: the raw material is added into the melting furnace according to the process requirements, and the impurity and gas in the melt can be removed effectively through degassing and slag refining.
(3) casting: molten aluminum liquid, in a certain casting process conditions, through the deep casting system, cooling casting into various specifications of round cast bar.
2, extrusion: extrusion is the method of forming profiles. Firstly, the die is designed and manufactured according to the section of the profile, and the heated round casting bar is extruded out of the die by using an extruder. Commonly used grade 6063 alloy, in the extrusion, also use an air-cooled quenching process and the artificial aging process, to complete the heat treatment strengthening. Different grades of alloy can be treated by heat treatment, and their heat treatment system is different.
3, color (mainly about the oxidation process here first oxidation): extrusion Aluminum Alloy profiles well, its corrosion resistance is not strong, should be to increase the aluminum corrosion resistance, wear resistance and surface by anodic oxidation surface treatment of the appearance of the. The main process is as follows:
(1) surface pretreatment: chemical or physical methods are used to clean the surface of the profile and expose the pure matrix to obtain a complete and compact artificial oxide film. The mirror or non light (Ya Guang) surface can also be obtained by mechanical means.
(2) anodizing: the surface of the pre processed profiles, in a certain process conditions, the substrate surface anodic oxidation, resulting in a dense, porous, strong adsorption of AL203 film. (3) sealing: the pore space of the porous oxide film produced by anodic oxidation is closed, so that the oxidation film is anti pollution, and the corrosion resistance and wear resistance are enhanced. The film is colorless and transparent, with strong adsorption before sealing film, adsorption and deposition of metal salts in some membrane hole, can make the profile appearance character (silver) show many colors, except such as: black, bronze, golden color and stainless steel etc..