Production process of aluminum alloy profiles:
1. Casting
Ingredients: According to the specific alloy grade to be produced, calculate the addition amount of various alloy components and reasonably mix various raw materials.
Smelting: Add the prepared raw materials into the melting furnace according to the requirements of the process, and remove the slag and gas in the melt by degassing and slagging refining means.
Casting: Under certain casting process conditions, the molten aluminum liquid is cooled and cast into round cast rods of various specifications through a deep-well casting system.
2.Extrusion
Extrusion is a means of profile forming.The mold is first designed and manufactured according to the section of the profile product, and the heated round casting rod is extruded from the mold using an extruder. In the extrusion, an air-cooled quenching process and an artificial aging process are used to complete the heat treatment strengthening. Different grades of heat treatable strengthened alloys have different heat treatment systems.
3.Surface treatment
The extruded aluminum alloy profile does not have a strong surface corrosion resistance. Surface treatment must be performed by anodizing to increase the corrosion resistance, wear resistance and appearance of the aluminum material.
The main process is:
Surface pretreatment: The surface of the profile is cleaned by chemical or physical methods, and the pure matrix is exposed to help obtain a complete and dense artificial oxide film. Mirror or matte (matte) surfaces obtained by mechanical means.
Anodizing: The surface pre-treated profile, under certain process conditions, anodized on the surface of the substrate, resulting in a dense, porous, and strong AL film layer.
Sealing: The pores of the porous oxide film formed after the anodization are closed, so that the anti-pollution, corrosion resistance and wear resistance of the oxide film are enhanced. The oxide film is colorless and transparent. Using the strong adsorption of the oxide film before sealing, some metal salts are adsorbed and deposited in the film holes, which can make the appearance of the profile show many colors other than natural colors, such as: black, bronze, golden yellow and stainless steel. Color etc.
