A kind of multi-component master alloy for aluminum alloy and preparation method thereof

An intermediate alloy and multi-component technology, applied in the field of aluminum alloys, can solve the problems of increasing the input amount of scandium oxide, uneven zirconium composition, and increasing production costs, and achieves good metamorphic strengthening effect, uniform distribution, and reduced content.

Active Publication Date: 2020-03-31
HUNAN ORIENTAL SCANDIUM
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  • Application Information

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Problems solved by technology

[0005] In the actual production process of Al-Sc (2%) master alloy, the molten salt aluminum reduction method is adopted. For high-content scandium alloys, the higher the scandium, the more difficult the production is limited by this method. In order to achieve 2% Sc content, It is necessary to increase the input amount of scandium oxide, which leads to an increase in the production cost of Al-Sc (2%), which reduces the low yield of scandium and large component segregation (the solid solubility of scandium in aluminum is low, resulting in segregation), while Al- Zr (5%) also has the problem of uneven zirconium composition and large deviation

Method used

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  • A kind of multi-component master alloy for aluminum alloy and preparation method thereof

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Experimental program
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Embodiment 1

[0024] Embodiment 1: In a 200kg intermediate frequency electric furnace, 95kg of aluminum is put into a graphite crucible, and 5.17kg of molten salt (wherein: Sc 2 o 3 1.07kg, ZrO 2 0.4kg, NH 4 F 2.0kg, NaF 0.25kg, KCl 1.3kg, MgCl 2 0.15kg). Heat to 950°C and keep warm for 40 minutes. Stir and remove slag, then lower the temperature to 760°C, add 0.4kg of manganese and 5.6kg of magnesium, and stir evenly. After 10 minutes, charge Ar / N 2 Degassing, sample analysis, cooling to 710°C, water-cooled mold ingot, about 100kg ingot, composition analysis of ingot, Mg4.9%, Mn0.4%, Sc0.71%, Zr0.3%, balance Al.

Embodiment 2

[0025] Embodiment 2: In a 200kg intermediate frequency electric furnace, 100kg of Al is put into a graphite crucible, and 6.0kg of molten salt (wherein: Sc 2 o 3 1.2kg, ZrO 2 0.5kg, NH 4 F 2.3kg, NaF 0.3kg, KCl 1.5kg, MgCl 2 0.2kg). Heat to 900°C and keep warm for 1hr. Stir evenly, remove slag, then lower the temperature to 740°C, add 0.6 kg of manganese metal and 5.5 kg of metal magnesium, and stir evenly. After 15 minutes, charge Ar / N 2 Degassing, sample analysis, cooling to 720°C, water-cooled mold ingot, about 106kg ingot, ingot composition analysis: Mg5.0%, Mn 0.56%, Sc 0.75%, Zr 0.35%, balance Al.

Embodiment 3

[0026] Embodiment 3: In a 200kg intermediate frequency electric furnace, 100kg of Al is put into a graphite crucible, and 3.0kg of molten salt (wherein: Sc 2 o 3 0.6kg, ZrO 2 0.25kg, NH 4 F 1.15kg, NaF 0.15kg, KCl 0.75kg, MgCl 2 0.1kg). Heat to 900°C and keep warm for 1hr. Stir evenly, remove slag, then lower the temperature to 740°C, add 0.21kg of metal manganese and 2.5kg of metal magnesium, and stir evenly. After 15 minutes, charge Ar / N 2 Degassing, sample analysis, cooling to 720°C, water-cooled mold ingot, about 102kg ingot, ingot composition analysis: Mg2.2%, Mn 0.2%, Sc 0.37%, Zr 0.17%, balance Al.

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Abstract

The invention discloses a multi-element intermediate alloy for an aluminum alloy and a preparing method of the multi-element intermediate alloy. The multi-element intermediate alloy comprises, by mass, 2%-6% of Mg, 0.2%-0.8% of Mn, 0.08%-0.8% of Sc, 0.08%-0.4% of Zr and the balance Al. a fused salt aluminothermic reducing method is adopted for alloy preparation. By means of the multi-element intermediate alloy and the preparing method, the content of scandium and zirconium in the intermediate alloy is greatly reduced, the reducing yield of the scandium and zirconium is improved, and the production cost of a scandium and zirconium contained alloy is reduced; and meanwhile, magnesium and manganese are used in an assisted manner for strengthening, and the multi-element intermediate alloy is good in comprehensive performance and has the very good intensified metamorphism effect.

Description

technical field [0001] The invention relates to a multi-component master alloy for aluminum alloys and a preparation method thereof, belonging to the technical field of aluminum alloys. Background technique [0002] The lightweight of aerospace, high-speed rail and automobiles has greatly promoted the development of wrought aluminum alloys, and lightweight high-strength aluminum alloys have been widely used. In the production of deformed aluminum alloy materials, the addition of metal scandium can significantly improve the performance of aluminum alloys, thus promoting the application of scandium in aluminum alloys. [0003] Due to the high price of scandium, the addition of a large amount of scandium will increase the cost of aluminum alloys. Therefore, on the one hand, it is necessary to seek alloying elements to replace metal scandium. The Chinese invention patent discloses an aluminum-scandium-zirconium master alloy for aluminum alloys and its production method (applica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/06C22C1/03C22C1/02
CPCC22C1/026C22C1/03C22C21/06
Inventor 陈卫平兰天翔柳术平王晓平胡双王力
Owner HUNAN ORIENTAL SCANDIUM
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