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A356 alloy and preparation method thereof

An alloy and ingot casting technology, which is applied in the preparation of the aforementioned A356 alloy and the field of A356 alloy, can solve the problems of long outgassing time, affecting the mechanical structure and performance of the alloy, and attenuation of the refining effect.

Active Publication Date: 2022-04-22
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the long time of vacuum refining and the high temperature of the melt, it is easy to cause Zr, Sr, Ti and other elements to react with the melt, resulting in precipitation, attenuation of the refining effect, and affecting the mechanical structure and properties of the alloy.

Method used

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  • A356 alloy and preparation method thereof
  • A356 alloy and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The A356 alloy in this embodiment contains the following components by weight percentage, Si: 6.0-7.0%, Mg: 0.25-0.35%, Ti: 0.05-0.15%, Y: 0.2%, Nd: 0.10%, Zr: 0.3 %, the rest is aluminum and unavoidable impurities, and the impurity content is ≤0.1%.

[0033] The production process method of the A356 alloy in the present embodiment is as follows:

[0034] Batching-smelting-rotary jet refining-modification treatment-refining treatment-vacuum degassing refining-filtering pouring-heat treatment.

[0035] ① Ingredients: Weigh semi-continuous A356 ingot, Al-Y alloy, Al-Nd alloy, Al-Zr alloy and Al-Ti-C-B refiner according to the proportion of each element in the alloy. Among them, Al-Ti-C-B The weight of the refiner is 0.5% of the total weight of semi-continuous A356 ingot, Al-Y alloy, Al-Nd alloy and Al-Zr alloy;

[0036] ②Smelting: Use a 50KW resistance furnace for melting, preheat the graphite crucible and casting mold to above 150°C in the resistance furnace, cool to 6...

Embodiment 2

[0044] The A356 alloy in this embodiment contains the following components by weight percentage, Si: 6.0-7.0%, Mg: 0.25-0.35%, Ti: 0.05-0.15%, Y: 0.25%, Nd: 0.15%, Zr: 0.45% %, the rest is aluminum and unavoidable impurities, and the impurity content is ≤0.1%.

[0045] The production process method of the A356 alloy in the present embodiment is as follows:

[0046] Batching-smelting-rotary jet refining-modification treatment-refining treatment-vacuum degassing refining-filtering pouring-heat treatment.

[0047] ① Ingredients: Weigh semi-continuous A356 ingot, Al-Y alloy, Al-Nd alloy, Al-Zr alloy and Al-Ti-C-B refiner according to the proportion of each element in the alloy. Among them, Al-Ti-C-B The weight of the refiner is 0.8% of the total weight of semi-continuous A356 ingot, Al-Y alloy, Al-Nd alloy and Al-Zr alloy;

[0048] ②Smelting: use a 50KW resistance furnace for melting, preheat the graphite crucible and casting mold to above 150°C in the resistance furnace, cool t...

Embodiment 3

[0056] The A356 alloy in this embodiment contains the following components by weight percentage, Si: 6.0-7.0%, Mg: 0.25-0.35%, Ti: 0.05-0.15%, Y: 0.30%, Nd: 0.20%, Zr: 0.6 %, the rest is aluminum and unavoidable impurities, and the impurity content is ≤0.1%.

[0057] The production process method of the A356 alloy in the present embodiment is as follows:

[0058] Batching-smelting-rotary jet refining-modification treatment-refining treatment-vacuum degassing refining-filtering pouring-heat treatment.

[0059] ① Ingredients: Weigh semi-continuous A356 ingot, Al-Y alloy, Al-Nd alloy, Al-Zr alloy and Al-Ti-C-B refiner according to the proportion of each element in the alloy. Among them, Al-Ti-C-B The weight of the refiner is 1% of the total weight of semi-continuous A356 ingot, Al-Y alloy, Al-Nd alloy and Al-Zr alloy;

[0060] ②Smelting: Use a 50KW resistance furnace for melting, preheat the graphite crucible and casting mold to above 150°C in the resistance furnace, cool to 65...

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Abstract

The invention relates to an A356 alloy, which is characterized by comprising the following components in percentage by weight: 6.0 to 7.0 percent of Si, 0.25 to 0.35 percent of Mg, 0.05 to 0.15 percent of Ti, 0.10 to 0.30 percent of Y, 0.10 to 0.20 percent of Nd, 0.3 to 0.8 percent of Zr and the balance of aluminum and inevitable impurities, and the content of the impurities is less than or equal to 0.1 percent, so that the mechanical property of the A356 alloy is more excellent.

Description

technical field [0001] The invention relates to the technical field of metal alloys, in particular to an A356 alloy, and also to a preparation method of the aforementioned A356 alloy. Background technique [0002] A356 alloy is mainly used in the manufacture of automobile wheels, and is also widely used in the fields of automobiles, aviation, aerospace, and electronic appliances. It is mainly composed of primary α-Al solid solution and eutectic Si phase. The existing A356 alloy has problems such as coarse structure, dendrite segregation and needle-like structure when it is applied to large-scale components, resulting in insufficient strength and plasticity. Application in high-spec, large-size (≧19inch) heavy-duty auto parts. [0003] At present, in order to realize the further popularization and application of A356, modification and heat treatment are often used to eliminate dendrite segregation and needle-like structure in the structure and improve the comprehensive mecha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/04C22C1/03B22D7/00C22F1/043C22B9/04
CPCC22C21/04C22C1/026C22C1/03B22D7/005C22F1/002C22F1/043C22B9/04
Inventor 张将朱鸿磊洪晓露徐英刘永强彭银江陈大辉侯林冲
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH