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A kind of high wear-resistant secondary aluminum alloy and its preparation method and application

An aluminum alloy, high wear resistance technology, applied in the field of aluminum alloy, can solve the problems of hindering the flow of eutectic metal liquid, damage the plasticity of aluminum alloy, deteriorate the performance of components, etc., and achieve the effect of good application prospect, low cost and reduction of growth time.

Active Publication Date: 2020-01-24
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The thick and narrow needle-like iron-rich phase splits the aluminum matrix when it is stressed, which is an important crack source for component failure, and expands along the length of the iron-rich phase, which greatly damages the plasticity of the aluminum alloy
In addition, the existence of coarse and needle-like iron-rich phases hinders the flow of eutectic molten metal, and becomes an important cause of pores and shrinkage porosity, further deteriorating the performance of components
[0003] However, not all Fe is detrimental in aluminum alloys

Method used

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  • A kind of high wear-resistant secondary aluminum alloy and its preparation method and application

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preparation example Construction

[0023] The embodiment of the present invention provides a method for preparing the above-mentioned high wear-resistant recycled aluminum alloy, which includes: melting industrial waste aluminum, adjusting the composition of the aluminum melt according to the content requirements of Si, Fe, Mn, Mg and impurity elements, and then adding Master alloys such as Al-B, Al-Sr, and Al-RE are cast into ingots or introduced into production tundishes after refining, standing, and slag removal.

[0024] Specifically, the cleaned, sorted and preheated aluminum scraps are put into an aluminum alloy melting furnace and heated to 780-850°C. After the recycled aluminum alloy is completely melted, the aluminum melt is stirred, and samples are taken from the middle of the aluminum melt with a sampling spoon. , Assay alloy composition.

[0025] Comparing the content of Si, Fe, Mn, Mg and impurity elements in the alloy and the target alloy, re-batching and putting it into the aluminum melt for melt...

Embodiment 1

[0031] This embodiment provides a high wear-resistant recycled aluminum alloy, which is mainly prepared through the following steps:

[0032] The alloy composition is configured by weight percentage, including: Si 7.0%, Fe 2.5%, Mn 0.7%, Mg 0.30%, B0.04%, RE 0.15%, Sr0.01%, and the balance is Al.

[0033] The cleaned, sorted and preheated aluminum scraps are put into an aluminum alloy melting furnace and heated to 800°C.

[0034] After the regenerated aluminum alloy is completely melted, stir the melt, use a sampling spoon to take a sample from the middle of the melt, and test the alloy composition.

[0035] Compare the content of the four main alloying elements such as Si, Fe, Mn, Mg and impurity elements in the alloy and the target alloy, re-batch and put it into the melt for melting, and retest the composition after stirring until the above four elements and impurity elements reach the standard , and then cooled to 720°C.

[0036] Wrap the proportioned Al-B, Al-Sr and Al-...

Embodiment 2

[0039] This embodiment provides a high wear-resistant recycled aluminum alloy, which is mainly prepared through the following steps:

[0040] The alloy composition is configured by weight percentage, including: Si 9.0%, Fe 1.5%, Mn 0.65%, Mg 0.35%, B0.01%, RE 0.05%, Sr 0.04%, and the balance is Al.

[0041] The cleaned, sorted and preheated aluminum scraps are put into the aluminum alloy melting furnace and heated to 780°C.

[0042] After the regenerated aluminum alloy is completely melted, stir the melt, use a sampling spoon to take a sample from the middle of the melt, and test the alloy composition.

[0043] Compare the content of the four main alloying elements such as Si, Fe, Mn, Mg and impurity elements in the alloy and the target alloy, re-batch and put it into the melt for melting, and retest the composition after stirring until the above four elements and impurity elements reach the standard , and then cooled to 710°C.

[0044] Wrap the proportioned Al-B, Al-Sr and ...

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Abstract

The invention provides high-wear-resistance regenerative aluminum alloy and a preparation method and application thereof, and relates to the technical field of aluminum alloy. The high-wear-resistanceregenerative aluminum alloy mainly comprises the following components: 7.0-12.0% of Si, 1.2-5.0% of Fe, 0.5-1.5% of Mn, 0.1-0.4% of Mg, 0.03-0.06% of B, 0.05-0.30% of RE, 0.01-0.06% of Sr, 0-0.15% ofimpurity elements and the balance of Al. The preparation method of the high-wear-resistance regenerative aluminum alloy comprises the following steps: melting waste aluminum materials; adjusting components of molten aluminum according to the requirements for the components; then adding intermediate alloy such as Al-B, Al-Sr and Al-RE according to the ratio; and refining and standing, and then pouring into ingots or tundish. By a composite modification technology, regenerated aluminum which contains an iron-rich phase with high volume fraction is prepared, and the wear resistance of the alloyis greatly improved. The high-wear-resistance regenerative aluminum alloy has the advantages of simple process, low cost and the like.

Description

technical field [0001] The invention relates to the technical field of aluminum alloys, and in particular to a high wear-resistant recycled aluminum alloy, a preparation method and application thereof. Background technique [0002] Iron is the most common and harmful impurity element in secondary aluminum, and its Fe content gradually increases with the increase of the life cycle of secondary aluminum. Since the maximum solubility of Fe element in aluminum solid is 0.05wt.%, the rest of Fe will exist in the form of brittle and hard iron-rich phase. The thick and narrow needle-like iron-rich phase splits the aluminum matrix under stress, which is an important crack source for component failure, and expands along the length of the iron-rich phase, which greatly damages the plasticity of the aluminum alloy. In addition, the existence of coarse and needle-like iron-rich phases hinders the flow of eutectic molten metal, and becomes an important cause of pores and shrinkage poros...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/04C22C1/03
CPCC22C1/026C22C1/03C22C21/04
Inventor 宋东福王顺成康跃华甘春雷李继林郑开宏
Owner GUANGDONG INST OF NEW MATERIALS
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