Langfang DingYang

Production Technology of Alloy Steel Flange

fittingflange | 13 December, 2018 16:25

Before the production of aluminium alloy steel flange , according to the size of the drawings, a rigorous and meticulous calculation and analysis were carried out to obtain the corresponding theoretical weight of the flange. Finally, the following technological route was adopted: cutting - - - electric furnace heating - - - forging - - - melting - - - forming - - - lathe processing - - - finished products. 1. Casting is the first process in the production of aluminium pipe fittings . A. Ingredients: According to the specific alloy grades produced according to the needs, the amount of additions of various alloy components can be calculated, and various raw materials can be rationally matched. B. Melting: The raw materials are added to the smelting furnace to melt according to the technological requirements, and the impurities and gases in the melt are effectively removed by means of degassing and slag removal refining. C. Zirconium casting: The melted liquid aluminium is cooled and cast into round rods of various specifications under certain casting conditions through deep well casting system. 2. Extrusion: Extrusion is the means of forming profiles. First, the die is designed and manufactured according to the section of profiles. The heated round casting rod is extruded from the die by extrusion. 3. Coloring. A. Surface pretreatment: Clean the profile surface by chemical or physical methods, expose the pure matrix, in order to obtain a complete and compact artificial oxide film. Mirror or matte surfaces can also be obtained by mechanical means. B. Anodic oxidation: A dense, porous and strong adsorptive layer of AL203 film is formed on the surface of the profile after surface pretreatment under certain technological conditions. C. Sealing: The pore of porous oxide film formed after anodic oxidation is sealed to enhance the anti-pollution, anti-corrosion and wear resistance of the oxide film. The oxide film is colorless and transparent. It can absorb and deposit some metal salts in the pore of the film by using the strong adsorption of the oxide film before sealing. Many colors other than the true color can be displayed on the surface of the profile.


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