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Aluminum alloy for pedestrian bridges and preparation method thereof

A pedestrian bridge and aluminum alloy technology, which is applied in the field of aluminum alloy processing, can solve the problem of reducing the plasticity of aluminum alloys, toughness, fatigue resistance and corrosion resistance, poor process performance and surface quality of aluminum alloys, and damage to the continuity of aluminum alloy substrates, etc. problems, to achieve the effect of reducing production costs, easy recycling and reuse, and good landscape effects

Active Publication Date: 2016-09-28
ALNAN ALUMINIUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existence of non-metallic inclusions such as oxides will destroy the continuity of the aluminum alloy matrix, reduce the plasticity, toughness, fatigue resistance and corrosion resistance of the aluminum alloy, and make the process performance and surface quality of the aluminum alloy worse.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The chemical composition of aluminum alloy of the present invention is by mass percent:

[0026] Mg:0.55%, Si:0.55%, Mn:0.18%, Cr:0.1%, Ta:0.05%, Ni:0.10%, V:0.10%, Cu:0.1%, Zn≤0.05%, Fe≤0.20%, Ti≤0.05%, the single content of other impurity elements≤0.05%, the total content of other impurity elements≤0.15%, and the balance is Al.

Embodiment 2

[0028] The chemical composition of aluminum alloy of the present invention is by mass percent:

[0029] Mg: 1.0%, Si: 0.8%, Mn: 0.55%, Cr: 0.2%, Ta: 0.2%, Ni: 0.3%, V: 0.50%, Cu: 0.3%, Zn≤0.05%, Fe≤0.20%, Ti≤0.05%, the single content of other impurity elements≤0.05%, the total content of other impurity elements≤0.15%, and the balance is Al.

Embodiment 3

[0031] The chemical composition of aluminum alloy of the present invention is by mass percent:

[0032]Mg:0.65%, Si:0.65%, Mn:0.28%, Cr:0.15%, Ta:0.1%, Ni:0.15%, V:0.2%, Cu:0.15%, Zn≤0.05%, Fe≤0.20%, Ti≤0.05%, the single content of other impurity elements≤0.05%, the total content of other impurity elements≤0.15%, and the balance is Al.

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Abstract

The invention relates to an aluminum alloy for pedestrian bridges and a preparation method thereof. The invention is characterized in that the aluminum alloy is composed of the following chemical components in percentage by mass: 0.55-1.0% of Mg, 0.55-0.8% of Si, 0.18-0.55% of Mn, 0.1-0.2% of Cr, 0.05-0.2% of Ta, 0.10-0.3% of Ni, 0.10-0.50% of V, 0.1-0.3% of Cu, at most 0.05% of Zn, at most 0.20% of Fe, at most 0.05% of Ti, at most 0.15% of other impurity elements (at most 0.05% of each of other impurity elements), and the balance of Al. The preparation method comprises the following steps: smelting, refining, casting and uniformizing. By optimizing the alloy composition, trace amounts of Ta, Ni and V are added to obviously enhance the strength, toughness, fatigue resistance, corrosion resistance and processability of the aluminum alloy.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy processing, in particular to an aluminum alloy suitable for pedestrian bridges and a preparation method thereof. Background technique [0002] Pedestrian bridges can not only better relieve traffic pressure, but also the best way to separate people and vehicles. In the future, with the advancement of urbanization and the needs of urban construction, there will be more and more projects to build pedestrian bridges. According to calculations, hundreds of pedestrian bridges will need to be built every year across the country. At present, pedestrian bridges mainly adopt steel structures, and the advantages of steel structure bridges are obvious, but steel pedestrian bridges have relatively large dead weight, low bearing capacity, and steel materials are easy to corrode, and the residual value of corroded steel carriages is low, which is also common Facing durability problems and high maintenan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C21/02C22C1/03C22C1/06C22F1/05
CPCC22C1/026C22C1/03C22C1/06C22C21/02C22C21/08C22F1/05
Inventor 雷素萍李彬李永弟秦龙飞杨婷婷罗金凤
Owner ALNAN ALUMINIUM CO LTD
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