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Aluminum alloy and preparation method thereof

An aluminum alloy, weight percentage technology, applied in the field of aluminum alloys, can solve problems such as poor weldability, and achieve the effects of improving corrosion resistance, improving alloy formability and weldability, and reducing electrochemical inhomogeneity

Active Publication Date: 2014-12-03
SHANDONG YUHANG SPECIAL ALLOY EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention has high strength, good corrosion performance, good fracture toughness and good castability, but the weldability of the invention is poor

Method used

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  • Aluminum alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1 An aluminum alloy with good corrosion resistance, good formability and good weldability

[0023] Composed of the following components by weight percentage (wt%):

[0024] Mg 0.60, Mn 0.28, Cr 0.15, Si 0.73, Fe 0.18, Cu 0.43, Ti 0.04, Na 0.17, and the balance is Al.

[0025] The method for preparing the above-mentioned aluminum alloy comprises the following steps:

[0026] (1) Put the raw materials Mg, Mn, Cr, Si, Fe, Cu, Ti, Na and Al by weight into the melting furnace for melting, and ensure that the melting temperature is 730°C-760°C;

[0027] (2) Stir steadily when the furnace charge is about 90% melted. It is forbidden to involve the surface scum into the molten metal. Each furnace is stirred at the bottom of the furnace 4 times during the melting process to help the melting, shorten the melting time, and prevent Partial overheating of aluminum water;

[0028] (3) After the melt is evenly stirred, take samples immediately and conduct pre-furnace analysi...

Embodiment 2

[0032] Example 2 An aluminum alloy with good corrosion resistance, good formability and good weldability

[0033] Composed of the following components by weight percentage (wt%):

[0034] Mg 0.55, Mn 0.26, Cr 0.1, Si 0.71, Fe 0.1, Cu 0.41, Ti 0.02, Na 0.16, and the balance is Al.

[0035] The method for preparing the above-mentioned aluminum alloy comprises the following steps:

[0036] (1) Put the raw materials Mg, Mn, Cr, Si, Fe, Cu, Ti, Na and Al by weight into the furnace for melting, and ensure that the melting temperature is 650°C-760°C;

[0037] (2) Stir steadily when the furnace charge is about 90% melted. It is forbidden to involve the surface scum into the molten metal. Each furnace is stirred 3 times at the bottom of the furnace during the melting process to help the melting, shorten the melting time, and prevent Partial overheating of aluminum water;

[0038] (3) After the melt is evenly stirred, take samples immediately and conduct pre-furnace analysis. Accordi...

Embodiment 3

[0042] Example 3 An aluminum alloy with good corrosion resistance, good formability and good weldability

[0043] Composed of the following components by weight percentage (wt%):

[0044] Mg 0.63, Mn 0.29, Cr 0.19, Si 0.74, Fe 0.22, Cu 0.44, Ti 0.06, Na 0.19, and the balance is Al.

[0045] The method for preparing the above-mentioned aluminum alloy comprises the following steps:

[0046] (1) Put the raw materials Mg, Mn, Cr, Si, Fe, Cu, Ti, Na and Al by weight into the furnace for melting, and ensure that the melting temperature is 560°C-760°C;

[0047] (2) Stir steadily when the furnace charge is about 90% melted. It is forbidden to involve the surface scum into the molten metal. Each furnace is stirred 5 times during the melting process to help the melting, shorten the melting time, and prevent Partial overheating of aluminum water;

[0048] (3) After the melt is evenly stirred, take samples immediately and conduct pre-furnace analysis. According to the analysis results,...

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Abstract

The invention relates to aluminum alloy and a preparation method thereof. The aluminum alloy comprises the following components in percentage by weight: 0.55%-0.65% of Mg, 0.25%-0.3% of Mn, 0.1%-0.2% of Cr, 0.7%-0.75% of Si, 0.1%-0.25% of Fe, 0.4%-0.45% of Cu, 0.02%-0.06% of Ti, 0.15%-0.20% of Na and the balance of Al. By changing the type and content of alloy elements, the corrosion resistance, formability and weldability of the alloy are improved, the heat conductivity and specific heat capacity of the aluminum alloy can be effectively reduced, the loss of heat in a welding process is reduced, the heat expansion coefficient of the aluminum alloy is correspondingly reduced, and the stress deformation of a weldment during welding is reduced.

Description

technical field [0001] The invention relates to an aluminum alloy and a preparation method thereof, in particular to an aluminum alloy with high corrosion resistance, better formability and excellent weldability and a preparation method thereof, belonging to the technical field of aluminum alloys. Background technique [0002] Since the 1990s, aluminum companies in some developed countries have begun to study lead-free and easy-to-process aluminum alloys. Researchers have studied the use of other alloying elements to replace lead in aluminum alloys. These replacement elements include: Si, Mn, Fe and Ni, etc. Kaiser markets uses Sn to replace Pb in 6262, and designs its internal grade as KA62 alloy. Compared with 6262 alloy, the physical properties and processing properties of this alloy are B-level. Reynolds uses In and Sn to replace Pb and Bi in the 6262 alloy. These alloy elements form the expected low-melting eutectic phase in the aluminum alloy, and the processing perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/02
Inventor 王明星王明亮王呈刚张建忠
Owner SHANDONG YUHANG SPECIAL ALLOY EQUIP