Aluminum alloy material special for die-casting aluminum alloy heat radiator and preparation method of aluminum alloy material

Abstract

The invention relates to an aluminum alloy material special for a die-casting aluminum alloy heat radiator. The material is prepared from, by mass percent, 9.0%-9.4% of Si, 0.5%-0.75% of Cu, 0.35%-0.42% of Mg, 0.1%-0.25% of Mn, 0.01%-0.023% of Sn, 0.03%-0.05% of Ni, 0.07%-0.1% of Ti, 0.9%-1.2% of Zn, 0.9%-1.0% of Fe, 0.03%-0.04% of Pb, 0.0025%-0.003% of Hg, 0.001%-0.0015% of Cd, 0.002%-0.025% of the rare earth element RE, 0.15%-0.20% of Zr and the balance Al. According to the technical scheme, the contents of silicon, magnesium, iron, copper and zinc in an aluminum alloy are optimized, a deep-cavity thin-wall die-casting piece of the aluminum alloy in the heat radiator is easy to form, sticky molds are reduced, and the corrosion resisting property is enhanced; and the rare earth element and the zirconium element are added in the aluminum alloy, harmful elements and gas are removed, molten aluminum is purified, and the strength, plasticity and pressure resistance of the aluminum alloy are improved.

Description

technical field [0001] The invention relates to an aluminum alloy material and a preparation method thereof, in particular to a special aluminum alloy material for a die-casting aluminum alloy radiator and a preparation method thereof. Background technique [0002] Traditional radiators are mostly made of cast iron and steel, which have poor thermal conductivity, heavy weight, large volume, small heat dissipation surface area, and low heat dissipation efficiency. In order to increase heat dissipation, the heat dissipation surface area is often increased by increasing the number of heat dissipation units , this not only needs to increase the cost, but also increases the volume of the radiator, resulting in an increase in the space for installing the radiator. In addition, the radiator made of cast iron has a rough surface and is difficult to surface treatment, and the radiator made of steel has many solder joints. The loss is large, the production efficiency is low, the appea...

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Problems solved by technology

[0007] 5. The product is severely deformed due to the rapid cooling of the blank during the mold opening process after die-casting, which seriously affects the appearance of the finished product and subsequent processing

[0010] In terms of production technology and process, there are many manufacturers of die-casting aluminum alloy heating radiators in my country, with large differences in level, but common problems include large differences in aluminum alloy elements, poor molding of side fins during the die-casting process, and high scrap rate