High-efficiency low-strontium-consumption 4004 aluminum alloy modification method

A technology of aluminum alloy and aluminum alloy melt, which is applied in the field of aluminum alloy preparation, can solve the problems of 4004 aluminum alloy such as coarse silicon phase, unstable modification effect, and high strontium residue, and achieve stable modification effect, easy operation, and low strontium residue low effect
CN114752802APending Publication Date: 2022-07-15DALISHEN ALUMINUM
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
DALISHEN ALUMINUM
Publication Date
2022-07-15

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Abstract

The invention discloses a high-efficiency low-strontium-consumption 4004 aluminum alloy modification method, which comprises the following steps that a blocky aluminum-strontium intermediate alloy is adopted as a modifier to be added into a 4004 aluminum alloy melt, and the adding amount of the strontium element is 0.008-0.01 wt%, so that the residual quantity of strontium is 0.001-0.003 wt% before casting, aiming at a high-silicon aluminum alloy, the adding amount of Sr and the refining time during smelting are controlled, and the content of strontium in the high-silicon aluminum alloy is controlled. The purpose of alloy structure modification is achieved, a silicon phase is prevented from being in a thick sheet shape or a needle shape, the line size of the silicon phase is controlled to be within 50 microns, a serious cutting effect on a matrix is prevented, the mechanical property of the alloy is improved, and the defects in the composite rolling process are avoided, so that the ideal modification effect is achieved.
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Description

technical field

[0001] The invention is a 4004 aluminum alloy modification method with high efficiency and low strontium consumption, and belongs to the technical field of aluminum alloy preparation. Background technique

[0002] 4004 aluminum alloy is used as the cladding layer of composite aluminum foil with low melting point and good fluidity, and can be used as brazing material under certain temperature conditions. In the process of producing 4004 alloy ingots, due to the high content of silicon in the alloy, the silicon phase is in the form of coarse flakes or needles, which has a serious splitting effect on the matrix and reduces the mechanical properties of the alloy, especially the plasticity, resulting in rolling There are many defects in production. The use of modifiers to refine the silicon phase can avoid the above problems, and sodium salts and Cu-P master alloys are commonly used in the industry for modification. However, the sodium modifier will increase the...

Claims

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