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Fine grained aluminum alloy and its preparing method

An aluminum alloy and fine-grain technology, which is applied in the field of fine-grained aluminum alloy and its preparation, can solve the problems of low element recovery rate, large variation, and high cost of intermediate alloys, and achieves the advantages of reducing cost, improving recovery rate and ensuring quality. Effect

Inactive Publication Date: 2009-05-27
DONGHUA UNIV
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  • Application Information

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Problems solved by technology

However, the refinement effect of the master alloy is closely related to its microstructure and varies greatly
Their manufacturing process is not easy to master, and the refinement effect of each batch of alloys is different, which affects the quality of aluminum and aluminum alloy products
In addition, the cost of the master alloy is high, and the recovery rate of each element is low

Method used

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  • Fine grained aluminum alloy and its preparing method

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Embodiment Construction

[0052] Add iron-removing silicon-titanium-alumina ore powder (containing trace boron oxide and rare earth oxide) in the 60KA electrolytic cell. Direct electrolysis in cryolite system electrolyte to produce aluminum alloy containing low titanium, boron, rare earth and silicon. Adjust the chemical composition in the aluminum mixing furnace. The chemical composition of electrolytic ZL101 aluminum-silicon alloy is as follows (mass fraction, %): Si7.24, Mg0.36, Fe0.11, Ti0.11, B0.0001, RE0.036. The average size of α primary dendritic aluminum phase grains is 350 microns ( figure 1 ). The average grain size of ZL101 alloy (0.10-0.15% titanium content) treated with Al-Ti master alloy under the same process conditions is 700 microns.

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Abstract

The invention relates to a refined crystal grain aluminum alloy and the manufacturing method. It is made up from Si 0.2-7.5wt%, Mn 0.05-1.5wt%, Mg 0,05-6.0wt%, Zn 0.03-8.5wt%, Cu 0.05-7.0wt%, Ni 0.1-2.5wt%, Ti 0.01-0.15wt%, RE 0.01-0.3wt%, B 0.0001-0.10wt%, and the rest is Al. The technology feature is that it adds silicon titanium alumina, borax and or rare earth oxide or rare earth carbonate, or titanium oxide, borax and / or rare earth oxide or rare earth carbonate into aluminum cell. Add the manganese oxide, compound of copper or Ni would be also added. Comparing to traditional technology, the refiner is not added, and the refining effect is enhanced and the perdurability is prolonged. It could be used to produce wire, band, tube, panel, aluminum foil, etc.

Description

Technical field [0001] The present invention relates to a fine-grained aluminum alloy and a preparation method thereof, more specifically, adding silicon-titanium-alumina or titanium oxide and borax and / or rare earth oxides or rare earth carbonates (when required It is also possible to add manganese oxide, copper compounds or nickel compounds), directly electrolyze these compounds to obtain fine-grained aluminum alloys containing refining elements titanium, boron and / or rare earths, and then adjust other chemical components in the aluminum mixing furnace . The present invention does not use a master alloy type refiner. Background technique [0002] Fine-grained aluminum alloy with good plasticity and stamping properties is an ideal material for the production of wires, strips, tubes, plates, aluminum foils, engine radiators, beverage cans, and auto parts. [0003] There are three types of methods currently used to refine the grains of aluminum or aluminum alloys: [0004] 1. Chem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C1/00C22C1/03C22B1/02C25C1/02
Inventor 王汝燿杨冠群焦占忠
Owner DONGHUA UNIV
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