Special aluminum alloy material for steel-aluminum composite radiator and preparation method thereof

Abstract

The invention relates to a special aluminum alloy material for a steel-aluminum composite radiator. The special aluminum alloy material is characterized by comprising, by mass, 12.2 to 13.3% of Si, 2.6 to 2.8% of Cu, 0.4 to 0.5% of Mg, 0.1 to 0.25% of Mn, 0.01 to 0.023% of Sn, 0.03 to 0.05% of Ni, 0.07 to 0.1% of Ti, 0.7 to 1.1% of Zn, 0.8 to 0.95% of Fe, 0.03 to 0.04% of Pb, 0.0025 to 0.003% of Hg, 0.001 to 0.0015% of Cd, 0.015 to 0.023% of rare earth elements (RE) and 0.1 to 0.15% of Zr, with the balance being Al. According to a technical scheme in the invention, the contents of silicon, magnesium, iron and copper in the aluminum alloy are optimized, so aluminum alloy for a deep-cavity thin-wall die casting of the radiator is easy to mold, reduced in the phenomenon of mold sticking and improved in corrosion resistance; and the rare earth elements and elemental zirconium are added into the aluminum alloy, so harmful elements and gases 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 steel-aluminum composite 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 number of heat dissipation units is often increased by increasing the heat dissipation surface area. , which not only increases the cost, but also increases the volume of the radiator, which leads to an increase in the space for installing the radiator. In addition, the surface of the radiator made of cast iron is rough, the surface treatment is difficult, and the radiator made of steel has many solder joints. The loss is large, the production efficiency is low, the appearanc...

AI Technical Summary

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