Automobile heat dissipation fin aluminum foil prepared from aluminum alloy XR348and preparation method of automobile heat dissipation fin aluminum foil

Abstract

The invention relates to an automobile heat dissipation fin aluminum foil prepared from an aluminum alloy XR348. The aluminum alloy XR348 is prepared from the following components: 1.1 to 1.4 weight percent of manganese, 1.0 to 1.2 weight percent of silicon, 0.9 to 1.1 weight percent of iron, 0.8 to 1.0 weight percent of zinc, 0.21 to 0.30 weight percent of zirconium, 0 to 0.05 weight percent of titanium, 0 to 0.03 weight percent of copper, 0 to 0.01 weight percent of magnesium, 0 to 0.03 weight percent of a single unavoidable impurity, 0 to 0.10 weight percent of all unavoidable impurities and the balance of aluminum. The preparation method of the automobile heat dissipation fin aluminum foil comprises a step of performing continuous casting-rolling on the aluminum alloy XR348, so as to obtain the automobile heat dissipation fin aluminum foil. The preparation method disclosed by the invention is short in flow and high in quality; after being subjected to high-temperature soldering, the aluminum foil is extremely high in postwelding strength and high in corrosion resistance; diffusion of silicon atoms on a soldered layer can be prevented, so that the hang-down resistance property of a material is improved; therefore, the aluminum foil and the preparation method which are disclosed by the invention are extremely high in performance.

Description

technical field [0001] The invention relates to an aluminum foil and a preparation method thereof, in particular to an XR348 aluminum alloy aluminum foil for heat dissipation fins of an automobile and a preparation method thereof. Background technique [0002] With the demand of automobile light weight and energy saving and emission reduction, the thickness of heat dissipation fin aluminum foil used for automobile heat exchanger tube-fin structure has been developed from the thinnest 0.08mm to 0.04mm. 3005, 3003+Zn, 3A21+Zn, 6811 and other alloys made of automotive radiator fin aluminum foil, the post-weld strength after brazing at 600±20°C high temperature can no longer meet the collapse resistance of automotive heat exchanger tube-fin structure and corrosion resistance requirements. [0003] In the past, most of the heat sink aluminum foil blanks used in automotive heat exchanger tube-fin structures were produced with composite hot-rolled blanks, such as "a high-strength ...

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Problems solved by technology

[0002] With the demand of automobile light weight and energy saving and emission reduction, the thickness of heat dissipation fin aluminum foil used for automobile heat exchanger tube-fin structure has been developed from the thinnest 0.08mm to 0.04mm. 3005, 3003+Zn, 3A21+Zn, 6811 and other alloys made of automotive radiator fin aluminum foil, the post-weld strength after brazing at 600±20°C high temperature can no longer meet the collapse resistance of automotive heat exchanger tube-fin structure and corrosion resistance requirements