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Preparation method of ultra-large-specification high-Mg aluminum alloy round ingot

An ultra-large-sized, aluminum alloy technology, which is applied in the field of preparation of ultra-large-sized high-Mg aluminum alloy ingots, can solve the problems of poor quality of aluminum alloy ingots, high production costs, low production qualification rate, etc. The probability of ingot cracking and the effect of improving production qualification rate

Active Publication Date: 2018-10-26
广西南南铝加工有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] The typical production process of magnesium-aluminum alloy round ingots is as follows: batching→smelting→refining→online degassing / filtration→casting→homogenization annealing. There are often the following disadvantages: (1) ingots are prone to cracks; (2) the quality of aluminum alloy ingots is poor, with high hydrogen content and high alkali metal content
However, the above-mentioned shortcomings of casting ingots often lead to low production qualification rate and high production cost.

Method used

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  • Preparation method of ultra-large-specification high-Mg aluminum alloy round ingot

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Effect test

Embodiment 1

[0030] A method for preparing a super-large high-Mg aluminum alloy round ingot, comprising the following steps:

[0031] S1. Dosing according to the following alloy components by weight percentage: Mg4.5%, Mn0.6%, Cr 0.1%, Be 0.0005%, Ti0.1%, Zn≤0.2%, Cu≤0.10%, Fe≤0.30%, Si≤0.25%; others are Al and some unavoidable impurity elements.

[0032] S2. Melting: According to the calculated results of the ingredients, start feeding, first add remelted aluminum ingots, 5xxx aluminum alloy return materials, and magnesium ingots into the smelting furnace. Heat in the melting furnace until the charge is melted, stir for 50 minutes, the melting temperature is 730°C, and the melting time is 8 hours.

[0033] S3. After the smelting is completed, the molten aluminum is transferred to the holding furnace for heat preservation. The temperature of the heat preservation furnace is controlled at 720 ° C, and the heat preservation time is 4 hours. Adjust the composition of the magnesium ingot, th...

Embodiment 2

[0039] Example 2

[0040] A method for preparing a super-large high-Mg aluminum alloy round ingot, comprising the following steps:

[0041] S1. Dosing according to the following alloy components by weight percentage: Mg4.9%, Mn0.8%, Cr 0.2%, Be 0.0015%, Ti0.1%, Zn≤0.2%, Cu≤0.10%, Fe≤0.30%, Si≤0.25%; others are Al and some unavoidable impurity elements.

[0042] S2. Melting: According to the calculated results of the ingredients, start feeding, first add remelted aluminum ingots, 5xxx aluminum alloy return materials, and magnesium ingots into the smelting furnace. Heat in the melting furnace until the charge is melted, stir for 60 minutes, the melting temperature is 750°C, and the melting time is 8 hours.

[0043] S3. After the smelting is completed, transfer the molten aluminum to the holding furnace for heat preservation. The temperature of the heat holding furnace is controlled at 730°C, and the heat preservation time is 4 hours. Adjust the composition of magnesium ingots...

Embodiment 3

[0049] A method for preparing a super-large high-Mg aluminum alloy round ingot, comprising the following steps:

[0050] S1. Dosing according to the following alloy components by weight percentage: Mg4.0%, Mn1.0%, Cr 0.05%, Be0.0015%, Ti0.15%, Zn≤0.25%, Cu≤0.10%, Fe≤0.40% , Si≤0.40%; others are Al and some unavoidable impurity elements.

[0051] S2. Melting: According to the calculated results of the ingredients, start feeding, first add remelted aluminum ingots, 5xxx aluminum alloy return materials, and magnesium ingots into the smelting furnace. Heat in the melting furnace until the charge is melted, stir for 60 minutes, the melting temperature is 710°C, and the melting time is 6 hours.

[0052] S3. After the smelting is completed, the molten aluminum is transferred to the holding furnace for heat preservation. The temperature of the heat holding furnace is controlled at 700 ° C, and the heat preservation time is 3 hours. Adjust the composition of magnesium ingots, then ad...

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Abstract

The invention discloses a preparation method of an ultra-large-specification high-Mg aluminum alloy round ingot. The preparation method comprises the following steps of burdening; smelting; preservingheat; carrying out primary refining, and controlling of argon flow; carrying out online degassing refining, and controlling of the rotating speed of a rotor and the argon flow; casting; and carryingout a soaking treatment. According to the method, a hydrogen content and an alkali metal content of the aluminum alloy can be effectively reduced, the probability of cracking of a cast ingot is reduced, and the production percent of pass is improved.

Description

technical field [0001] The invention relates to the technical field of manufacturing Mg aluminum alloy round ingots, in particular to a method for preparing super-large high-Mg aluminum alloy round ingots. Background technique [0002] High Mg aluminum alloy products have been widely used in aerospace, shipbuilding, transportation, computer and communication fields. Compared with steel, the advantages of high Mg aluminum alloy are: low density, corrosion resistance, non-magnetic, and good performance in low temperature environment. Therefore, many countries regard it as an important strategic material in the 21st century. With the continuous development of material technology, aluminum-magnesium alloy materials will definitely have broader application prospects and practical value. [0003] The typical production process of magnesium-aluminum alloy round ingots is as follows: batching→smelting→refining→online degassing / filtration→casting→homogenization annealing. There are...

Claims

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Application Information

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IPC IPC(8): C22C21/06C22C21/08C22C1/03B22D11/00
CPCB22D11/003C22C1/026C22C1/03C22C21/06C22C21/08
Inventor 杨鸿驰何建贤赵启忠朱希一邓桂英黄金宁王福陆科呈
Owner 广西南南铝加工有限公司
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