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Rare-earth alloy and preparation method thereof

An aluminum alloy and rare earth technology, applied in the field of aluminum alloys, can solve the problems such as the inability to maintain the elongation of the wheel spoke properties, the difficulty in improving the mechanical properties of the aluminum alloy, and the cooling of the wheel spokes, so as to optimize the structure and morphology and optimize the morphology of eutectic silicon. , the effect of grain refinement

Inactive Publication Date: 2021-03-19
BAODING CITY LIZHONG WHEEL MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After years of research and application, it is very difficult to further improve the mechanical properties of this aluminum alloy. After various process adjustments, it is still impossible to maintain the properties of the alloy at a stable high level.
In addition, the sequential solidification of the low-pressure casting will cause the final cooling of the thick parts such as the spokes, so that the properties of the spokes, especially the elongation, cannot be maintained at a high level

Method used

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  • Rare-earth alloy and preparation method thereof
  • Rare-earth alloy and preparation method thereof
  • Rare-earth alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A rare earth aluminum alloy, comprising the following components by weight percentage:

[0053] Si: 6.30%,

[0054] Mg: 0.40%,

[0055] Cr: 0.20%,

[0056] Ca: 0.01%,

[0057] RE: 0.05%, of which La 0.0175%, Ce 0.0325%;

[0058] Mn: 0.10%,

[0059] Sr: 0.015%,

[0060] Ti: 0.11%,

[0061] B: 0.002%, the balance is Al and impurities, and the content of the impurities is ≤0.3107%;

[0062] The rare earth aluminum alloy contains impurities in the following weight percentages: Fe: ≤0.15%, Ga: ≤0.03%, Zn: ≤0.03%, V: ≤0.007%, each other impurity element ≤0.01%, and the sum of other impurity elements ≤0.1%.

[0063] The preparation method of the above-mentioned rare earth aluminum alloy comprises the following steps:

[0064] (1) Prepare raw materials: prepare materials according to the weight percentage of each component element in the target rare earth aluminum alloy, cut A356.2 aluminum alloy, Al-10Cr aluminum-chromium master alloy, Al-10Ca aluminum-calcium master ...

Embodiment 2

[0067] A rare earth aluminum alloy, comprising the following components by weight percentage:

[0068] Si: 6.30%,

[0069] Mg: 0.35%,

[0070] Cr: 0.10%,

[0071] Ca: 0.04%,

[0072] RE: 0.01%, of which La0.0035%, Ce 0.0065%;

[0073] Mn: 0.10%,

[0074] Sr: 0.015%,

[0075] Ti: 0.15%,

[0076] B: 0.01%, the balance is Al and impurities, the content of the impurities is ≤0.3107%;

[0077] The rare earth aluminum alloy contains impurities in the following weight percentages: Fe: ≤0.15%, Ga: ≤0.03%, Zn: ≤0.03%, V: ≤0.007%, each other impurity element ≤0.01%, and the sum of other impurity elements ≤0.1%.

[0078] The preparation method of the above-mentioned rare earth aluminum alloy comprises the following steps:

[0079] (1) Prepare raw materials: prepare materials according to the weight percentage of each component element in the target rare earth aluminum alloy, cut A356.2 aluminum alloy, Al-10Cr aluminum-chromium master alloy, Al-10Ca aluminum-calcium master alloy,...

Embodiment 3

[0082] A rare earth aluminum alloy, comprising the following components by weight percentage:

[0083] Si: 5.5%,

[0084] Mg: 0.45%,

[0085] Cr: 0.45%,

[0086] Ca: 0.15%,

[0087] RE: 0.08%, of which La 0.028%, Ce 0.052%;

[0088] Mn: 0.01%,

[0089] Sr: 0.001%,

[0090] Ti: 0.20%,

[0091] B: 0.02%, the balance is Al and impurities, and the content of the impurities is ≤0.3107%;

[0092] The rare earth aluminum alloy contains impurities in the following weight percentages: Fe: ≤0.15%, Ga: ≤0.03%, Zn: ≤0.03%, V: ≤0.007%, each other impurity element ≤0.01%, and the sum of other impurity elements ≤0.1%.

[0093] The preparation method of the above-mentioned rare earth aluminum alloy comprises the following steps:

[0094] (1) Prepare raw materials: prepare materials according to the weight percentage of each component element in the target rare earth aluminum alloy, cut A356.2 aluminum alloy, Al-10Cr aluminum-chromium master alloy, Al-10Ca aluminum-calcium master allo...

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Abstract

The invention provides a rare-earth alloy. Elements Mg and Si co-fine a strengthening phase Mg2Si in an ageing thermal treatment process, so that dislocation motion is effectively inhibited and the effect of strengthening a base body is achieved; Al-Ti-B and rare-earth elements are added to form a heterogeneous nucleation core with relatively low mismatching degree with an alpha-Al substrate lattice for performing grain reinforcement on the aluminum alloy, and impurities in the aluminum alloy are purified; elements Cr and Mn are added to inhibit growth advantages in single direction of a needle-like Fe phase, so that the needle-like Fe phase changed into a Chinese character shaped or granular Fe-containing phase; elements Sr and Ca are introduced to introduce eutectic silicon to form high-density twin crystal, so that optimization of the morphology of eutectic silicon is realized. Elements mutually act, so that a base phase alpha-Al, eutectic silicon and a Fe phase of the alloy have excellent microscopic morphology, and thus, the purposes of strengthening the alloy, refining the crystal grains and optimizing the structure morphology are achieved, and a rate of elongation of the alloy is remarkably increased.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, and in particular relates to a rare earth aluminum alloy and a preparation method thereof. Background technique [0002] At present, the number of automobiles in China is gradually increasing, and automobile exhaust has brought a huge burden to the environment. Automobile lightweight technology is one of the most effective methods to reduce automobile exhaust emissions. For every 100kg reduction in vehicle weight, 0.6L of fuel can be saved per 100 kilometers. The wheel is the driving part at the lowest position of the vehicle's unsprung center of gravity, and its weight reduction reflects the vehicle's energy-saving effect is more significant. A series of advantages of aluminum alloy make it gradually become an ideal material for lightweight vehicles. Therefore, the use of aluminum instead of steel to manufacture commercial wheels is a typical performance of the application of lightweig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/04C22C1/03
CPCC22C1/026C22C1/03C22C21/04
Inventor 臧永兴叶珍郑长清鲁建军曹学锋苗赛男周亚伟霍臣明高会超安磊
Owner BAODING CITY LIZHONG WHEEL MFG
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