Aluminum alloy radiating fin for heat exchanger

Abstract

The invention relates to an aluminum alloy radiating fin for a heat exchanger. The aluminum alloy radiating fin comprises the composition by the weight percentage: 0.3-0.5% of silicon, 1.8-2.0% of manganese, 0.05-0.08% of nickel, 0.3-0.5% of copper, 0.01-0.03% of magnesium, 0.1-0.3% of iron, 1.5-2.0% of zinc, 0.001-0.0015% of yttrium, 0.01-0.03% of titanium, 0.0001-0.00015% of boron, and the balance being aluminum and inevitable impurities. Wall thinning and weight lightening of the aluminum alloy radiating fin for the heat exchanger become possible, and in addition, the reliability of a heat radiating fin material and the heat exchanger is improved.

Description

technical field [0001] The invention belongs to the field of metal materials, and specifically refers to an aluminum alloy cooling fin for a heat exchanger. Background technique [0002] Due to the weight reduction of automobiles, heat exchangers for automobiles are also required to be light in weight, and correspondingly, heat dissipation sheets are required to be thinner and stronger. As a heat radiation sheet for a heat exchanger, the strength after brazing is insufficient, and the strength is insufficient in the process of thinning the heat radiation sheet. [0003] In order to improve the strength of the brazed heat dissipation sheet, an aluminum alloy heat dissipation sheet for heat exchangers composed of an aluminum alloy with Zn added to the Al-Mn-Si-Ni system has been proposed, but since the Ni content exceeds 1 % but less than 5%, so when Mn is set to a high content, the Al-Mn-Ni intermetallic compound tends to coarsen when casting a heat dissipation sheet, and th...

AI Technical Summary

Problems solved by technology

As a radiator sheet for heat exchangers, the strength after brazing is insufficient, and the strength is insufficient in the process of thinning the radiator sheet

[0003] In order to improve the strength of the brazed heat dissipation sheet, an aluminum alloy heat dissipation sheet for heat exchangers composed of an aluminum alloy with Zn added to the Al-Mn-Si-Ni system has been proposed, but since the Ni content exceeds 1 % but less than 5%, so when Mn is set to a high content, the intermetallic compound of the Al-Mn-Ni system is easy to coarsen when casting the heat dissipation sheet, and the processability of the heat dissipation sheet is reduced.