Production process of aluminium alloy casting rod specially used for rotary-swaged D061 wheel-type automobile hub

Abstract

An aluminium alloy casting rod specially used for rotary-swaged D061 wheel-type automobile hubs comprises the following components by weight: 0.70-0.80% of Si, 0.20-0.3% of Fe, 0.20-0.30% of Cu, 0.06-0.10% of Mn, 0.90-1.20% of Mg, 0.05-0.15% of Cr, not more than 0.05% of Zn, not more than 0.05% of Ti, and the balance of Al. The process comprises the following steps: weighing the components of Si, Fe, Cu, Mn, Cr, Zn, Ti, and Al, melting the components in a melting furnace, when the temperature reaches 735+ / -5 DEG C, removing scum, adding Mg according to the weight ratio, uniformly stirring, and removing slag to prepare aluminium alloy melt; introducing the aluminium alloy melt into a standing furnace, when the temperature reaches 735+ / -5 DEG C, adding refining powder and performing slag removing and refining; degassing with argon and an Al-Ti-B rod, and refining; putting the refined aluminium alloy melt into a standing furnace at a temperature of 730 DEG C-740 DEG C, standing for 30 min, performing casting molding by a hot-top casting machine, treating the cast aluminium alloy casting rod, performing uniform annealing treatment and cooling treatment, and performing detection to obtain the aluminium alloy casting rod specially used for rotary-swaged D061 wheel-type automobile hubs when detection shows that the product is qualified.

Description

technical field [0001] The invention relates to a production process of aluminum alloy casting rods specially used for forging and spinning D061 wheel hubs, in particular to a production process of aluminum alloy casting rods specially used for manufacturing automobile hubs (D061 type hubs), and belongs to the technical field of aluminum alloys . Background technique [0002] In recent years, with the rapid development of the automobile industry, the performance requirements of the automobile are getting higher and higher; the wheel hub is an important part of the automobile, and its quality will directly affect the performance and aesthetics of the automobile. Because aluminum alloy has the advantages of light weight, high strength and good toughness, many high-end automobile wheels at home and abroad are made of aluminum alloy materials. [0003] When using aluminum alloy materials to manufacture automobile wheels, most of them adopt die casting method. Since the aluminum...

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Problems solved by technology

[0003] When using aluminum alloy materials to manufacture automobile wheels, most of them adopt die casting method. Since the aluminum alloy wheels produced by this method are one-time casting molding, there is no reprocessing, the metal structure does not change, and there is a problem of low mechanical properties. Therefore, people in the industry have developed the forging method to produce aluminum alloy cast rods. The automobile wheel hubs made of aluminum alloy cast rods produced by the forging method have high strength and good mechanical properties, so they are favored by some high-end automobile manufacturers.

However, the aluminum alloy cast rod produced by the existing forging and spinning aluminum alloy casting rod production process has poor forgeability and plasticity, and is not suitable for manufacturing heavy vehicle wheels.