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High-wear-resistance regenerative aluminum alloy and preparation method and application thereof

An aluminum alloy, high wear-resistant technology, applied in the field of aluminum alloy, can solve problems such as hindering the flow of eutectic metal liquid, damaging the plasticity of aluminum alloy, and deteriorating the performance of components, achieving good application prospects, low cost, and reducing growth time.

Active Publication Date: 2018-11-27
GUANGDONG INST OF MATERIALS & PROCESSING
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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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  • High-wear-resistance regenerative aluminum alloy and preparation method and application thereof

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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 regenerated aluminum alloy, which includes: melting industrial waste aluminum materials, adjusting the composition of the aluminum melt according to the content requirements of Si, Fe, Mn, Mg and impurity elements, and then adding according to the ratio Master alloys such as Al-B, Al-Sr and Al-RE are poured into ingots or introduced into production tundish after refining, standing, and slagging.

[0024] Specifically, the cleaned, sorted and pre-heated aluminum scrap is put into an aluminum alloy furnace and heated to 780-850°C, after the regenerated aluminum alloy is completely melted, the aluminum melt is stirred, and a sampling spoon is used to sample the middle of the aluminum melt. , Testing the alloy composition.

[0025] Compare the content of Si, Fe, Mn, Mg and impurity elements in the alloy and the target alloy. After re-dosing, put them into the aluminum ...

Embodiment 1

[0031] This embodiment provides a highly 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 Al.

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

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

[0035] Compare the contents of Si, Fe, Mn, Mg and other four main alloying elements and impurity elements in the alloy and the target alloy, put them into the melt after re-mixing, and re-test the composition after stirring until the above-mentioned four elements and impurity elements reach the standard , And then cooled to 720 ℃.

[0036] The Al-B, Al-Sr and Al-La master alloys with good proportions ar...

Embodiment 2

[0039] This embodiment provides a highly 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 Al.

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

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

[0043] Compare the contents of Si, Fe, Mn, Mg and other four main alloying elements and impurity elements in the alloy and the target alloy, put them into the melt after re-mixing, and re-test the composition after stirring until the above-mentioned four elements and impurity elements reach the standard , And then cooled to 710 ℃.

[0044] The Al-B, Al-Sr, and Al-Ce master alloys with good proportions...

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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 regenerated aluminum alloy and a preparation method and application thereof. Background technique [0002] Iron is the most common and harmful impurity element in secondary aluminum, and as the number of life cycles of secondary aluminum increases, its Fe content gradually increases. 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 when stressed, which is an important source of cracks for component failure, and it expands along the length of the iron-rich phase, which greatly damages the plasticity of aluminum alloy. In addition, the presence of the coarse, needle-like iron-rich phase hinders the flow of the eutectic molten metal, which becomes an important cause of the formati...

Claims

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Application Information

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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 MATERIALS & PROCESSING
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