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Molten aluminum microelement limited aluminum alloy and preparation method thereof

A technology for trace elements and aluminum alloys, applied in the field of aluminum alloys, can solve problems such as failure to meet environmental protection requirements and low yield, and achieve the effects of improving environmental performance, improving yield, improving processing performance and casting performance

Inactive Publication Date: 2018-06-05
长春隆达铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of low yield and failure to meet environmental protection requirements existing in existing aluminum alloys, the present invention provides an aluminum alloy with limited trace elements in aluminum liquid and a preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] An aluminum alloy with limited trace elements in molten aluminum, its components and weight percentages of each component are as follows:

[0042] Si: 9-11%; Fe: 0.33-0.43%; Mg: 0.30-0.45%; Mn: 0.30-0.40%; Cu: 0.20-0.30%; Zn≤0.2%; Ti: 0.08-0.18%; Sr: 0.015 ~0.025%; Ni≤0.3%; Pb≤0.05%; Sn≤0.01%; P≤0.002%; Li≤0.0003%; Ca≤0.002%; Na≤0.002%; Bi≤0.005%; Be≤0.05%; ≤0.0075%; Sb≤0.004%; As≤0.01%; Hg≤0.004%; Al balance.

[0043] The preparation process of the above-mentioned aluminum alloy is as follows:

[0044] Step 1. Preheat the smelting and holding furnace for 30 minutes, put aluminum ingots for remelting and recycled aluminum into the smelting and holding furnace, and heat to 725°C to completely melt the aluminum material in the furnace into molten aluminum; then add Trace elements are alloyed at a temperature of 750-780°C;

[0045] Step 2: Infuse argon gas into the aluminum alloy melt and blow into GR6512 at the same time, process in the melt for 30 minutes, and carry o...

Embodiment 2

[0051] An aluminum alloy with limited trace elements in molten aluminum, its components and weight percentages of each component are as follows:

[0052] Si: 6.2-7%; Fe≤0.52%; Mg: 0.22-0.30%; Mn: 0.40-0.50%; Cu: 3.0-4.5%; Zn: 0.35-0.65%; Ti: 0.13-0.20%; ~0.008%; Ni≤0.3%; Pb≤0.05%; Sn≤0.01%; P≤0.002%; Li≤0.0003%; Ca≤0.002%; Na≤0.002%; Bi≤0.005%; Be≤0.05%; ≤0.0075%; Sb≤0.004%; As≤0.01%; Hg≤0.004%; Al balance.

[0053] The preparation process of the above-mentioned aluminum alloy is as follows:

[0054] Step 1. Preheat the smelting and holding furnace for 60 minutes, put aluminum ingots for remelting and recycled aluminum into the smelting and holding furnace, and heat to 740°C to completely melt the aluminum material in the furnace into molten aluminum; then add Alloying elements are used for alloying at a temperature of 760-780°C;

[0055] Step 2: Infuse argon gas into the aluminum alloy melt and blow into GR6512 at the same time, process in the melt for 20 minutes, and carr...

Embodiment 3

[0061] An aluminum alloy with limited trace elements in molten aluminum, its components and weight percentages of each component are as follows:

[0062] Si: 7.0~8.0%; Fe<0.3%; Mg: 0.35~0.45%; Mn: 0.15~0.25%; Cu: 2.8~3.2%; Zn<0.8%; 0.008%≤Ti<0.20%; 0.015%; Ni<0.3%; Pb≤0.05%; Sn≤0.01%; P<0.002%; Li≤0.0003%; Ca<0.002%; Na<0.001%; 0.0075%; Sb≤0.004%; As≤0.01%; Hg≤0.004%; Al balance.

[0063] The preparation process of the above-mentioned aluminum alloy is as follows:

[0064] Step 1. Preheat the smelting and holding furnace for 50 minutes, put aluminum ingots for remelting and recycled aluminum into the smelting furnace, and heat to 700°C to completely melt the aluminum material in the furnace into molten aluminum; then add the alloy to the molten aluminum alloying elements, the temperature is 760 ~ 780 ℃;

[0065] Step 2: Infuse argon gas into the aluminum alloy melt and blow into GR6512 at the same time, process in the melt for 25 minutes, and carry out refining and slag rem...

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Abstract

The invention discloses a molten aluminum microelement limited aluminum alloy and a preparation method of the aluminum alloy. The problem that the existing aluminum alloy is low in yield and cannot reach environmental protection standards. The aluminum alloy is prepared from, by weight, 6.2-11% of Si, 0.052% or less of Fe, 0.22-0.45% of Mg, 0.05-0.50% of Mn, less than 4.5% of Cu, less than 0.8% ofZn, less than 0.2% of Ti, less than 0.025% of Sr, 0.3% or less of Ni, 0.03% or less of Pb, 0.01% or less of Sn, 0.002% or less of P, 0.0003% or less of Li, 0.002% or less of Ca, 0.002% or less of Na,0.005% or less of Bi, 0.05% or less of Be, 0.0075% or less of Cd, 0.004% or less of Sb, 0.01% of less of As, 0.004% or less of Hg and the balance Al. The aluminum alloy has the advantages of being environmentally friendly and high in yield.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, and in particular relates to an aluminum alloy with limited trace elements in aluminum liquid and a preparation method thereof. Background technique [0002] Aluminum alloy is an alloy composed of aluminum and other elements. It is widely used in various fields such as auto parts industry, building materials industry, aerospace, and chemical industry. Due to the variety of aluminum materials recycled and purchased, the types and contents of metal elements contained in them are also uneven. Therefore, in the aluminum alloy smelting industry, if the trace elements are not limited, the processing performance and casting performance of castings will be affected to a certain extent. The impact, the yield rate is greatly reduced, and the environmental protection cannot meet the requirements. Contents of the invention [0003] In order to solve the problems of low yield and failure to meet en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/03C22C1/06
CPCC22C21/02C22C1/026C22C1/03C22C1/06
Inventor 代建松张成张莉孟阔宋峻岭
Owner 长春隆达铝业有限公司
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