Production process of aluminium alloy specially used for automobile hubs in salt damage regions

Abstract

A production process of aluminium alloy specially used for automobile hubs in salt damage regions. The aluminium alloy comprises the following components by weight: 6.8-7.4% of Si, 0.32-0.40% of Mg, 0.08-0.13% of Ti, not more than 0.13% of Fe, not more than 0.01% of Zn, not more than 0.03% of Ca, not more than 0.01% of Cu, not more than 0.05% of Mn, not more than 0.01% of P, not more than 0.05% of Ni, not more than 0.05% of Cr, not more than 0.01% of Sn, not more than 0.05% of Pb, and the balance of raw aluminum ingots. The process comprises the following steps: melting the components of Si, Ti, Fe, Zn, Ca, Cu, Mn, P, Ni, Cr, Sn, Pb, and raw aluminum ingots in a melting furnace according to the weight ratios, when the temperature reaches 750-820 DEG C, uniformly stirring the melt, adding Mg according to the weight ratio, uniformly stirring, removing slag to obtain aluminium alloy melt; introducing the aluminium alloy melt into a standing furnace, spraying a refining agent with argon or nitrogen into the aluminium alloy melt for refining; when the refining process completes, removing slag, allowing the aluminium alloy melt to stand in the standing furnace for 30 min; performing casting molding of the aluminium alloy melt after standing by an automatic casting machine, stacking and packaging to obtain the aluminium alloy specially used for automobile hubs in salt damage regions.

Description

technical field [0001] The invention relates to forging special aluminum alloys for automobile wheel hubs in salt-damaged areas, in particular to a production technology for special aluminum alloy materials specially used for Honda brand automobile wheel hubs, and belongs to the technical field of aluminum alloy wheel hub material production. Background technique [0002] The wheel hub is an important part of the car, and its quality directly affects the performance and aesthetics of the car. Due to the light weight, high strength and good toughness of aluminum alloy, many automobile wheels at home and abroad are made of aluminum alloy materials. [0003] The production process of automobile wheels requires very strict requirements on the performance of the wheel materials. The produced wheels not only require high strength, corrosion resistance, excellent impact toughness, fatigue resistance and good wear resistance, but also Must have a good finish to enhance the aestheti...

AI Technical Summary

Problems solved by technology

[0004] In recent years, with the rapid development of the automobile industry, the use of aluminum alloy materials to manufacture automobile wheels has become a common phenomenon. During the use of ordinary A356 aluminum alloy automobile wheels, especially in the salt-damaged areas of North America, the air has high humidity and salt The composition is high, and there are many corrosive ions in the air. Long-term use of A356 aluminum alloy wheels in this environment will cause the surface of the aluminum alloy wheels to be corroded

Because impurities such as Cu and Zn in the aluminum alloy are different from the electrode potential of aluminum, once encountering an air environment with more corrosive ions, it will intensify the corrosion of the aluminum alloy, damage the automobile hub, and cause the surface of the aluminum alloy hub to become black. , or black spots appear, not only will affect the appearance of the car wheel, but also reduce the strength and performance of the aluminum alloy wheel, shorten the service life of the car wheel, and reduce the safety of the car