Multi-element micro-alloyed high-strength aluminum-manganese alloy and preparation method thereof

Abstract

The invention discloses a multi-element micro-alloyed high-strength aluminum-manganese alloy and a preparation method thereof. The multi-element micro-alloyed high-strength aluminum-manganese alloy contains 0.1-0.5% of Mg, 0.3-1.5% of Si, 0.9-1.7% of Mn, 0.1-1.6% of Zn, 0.05-0.2% of Cu and the balance of aluminum, micro-alloying elements and inevitable impurities, wherein the micro-alloying elements preferably comprise one or more of 0.05-0.3% of Ti, 0.05-0.1% of B or 0.05-0.3% of Zr; and a rare earth element selected from one or two of Ce, La, Y, Er or Nd, and the content of each rare earth element is 0.05-0.3%. The multi-element micro-alloyed high-strength aluminum-manganese alloy disclosed by the invention has higher tensile strength and yield strength after a brazing process is performed, the tensile strength after brazing can achieve above 160MPa, and the yield strength can achieve about 60MPa; and furthermore, the corrosion resistance is great.

Description

technical field [0001] The invention relates to the field of aluminum alloys, in particular to a multi-component micro-alloyed high-strength aluminum-manganese alloy and a preparation method thereof, in particular to a multi-component micro-alloyed high-strength aluminum-manganese alloy for heat exchangers and a preparation method thereof. Background technique [0002] The lightweight of automobiles and other means of transportation has become a major project for the strategic development of my country's manufacturing industry. It has the strategic significance of driving the overall development of my country's manufacturing industry and realizing the modernization and high-tech of the manufacturing industry. The weight of the car itself is reduced by 10%, the fuel consumption can be reduced by 6-8%, and the fuel efficiency can be increased by 5-8%. For every 100 kg weight reduction, the fuel consumption can be reduced by 0.7L. Weight reduction and energy saving are one of ...

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Problems solved by technology

[0005] The first purpose of the present invention is to provide a multi-component micro-alloyed high-strength aluminum-manganese alloy to solve the defect that the strength of the aluminum alloy in the prior art is not high enough to meet the continuous thinning and lightweight requirements of the automobile industry

[0006] The second object of the present invention is to provide the above-mentioned preparation method of multi-element microalloyed high-strength aluminum-manganese alloy, so as to solve the defects in the prior art that the strength of aluminum alloy is not high enough to meet the continuous thinning and lightweight requirements of the automobile industry

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