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High strength and toughness material of aluminum alloy die casting and preparation method thereof

A technology for aluminum alloy materials and die castings, applied in the field of metal materials, can solve problems such as low Si content and poor casting performance, and achieve the effects of inhibiting grain growth, reducing inclusions, and reducing hot cracking tendency

Inactive Publication Date: 2019-08-13
佛山鑫溢腾兴新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN105803272B and CN100347322C are Al-Si-Mg-Cu and Al-Cu series respectively, the former Si content is low, and the casting performance of the latter is not good, all are unsuitable for die-casting process production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] According to the ratio of Al-11.0Si-7.5Zn-1.6Cu-0.35Fe-0.32Mn-0.9Mg-0.055Be-0.01Sr as an example, the mass of raw materials required for 35t alloy is calculated and prepared.

[0017] (1) Clean the furnace and prepare raw materials according to the ratio of alloy composition;

[0018] (2) Put industrial pure aluminum, Al-Si master alloy, red copper, electrolytic manganese, Al-Fe master alloy, etc. into the furnace together, and raise the temperature to 750°C;

[0019] (3) After the alloy is completely melted, adjust the temperature of the molten aluminum to 700°C, add Zn ingots, Mg ingots and Al-Be master alloys packed in aluminum foil; use high-purity inert gas as a carrier to spray the refining agent into the melt , to degas and remove impurities, and remove slag after standing for 15 minutes;

[0020] (4) Add the prepared Al-Sr modifier into the aluminum melt, and fully stir the melt with a tool. After standing for 30 minutes, it is cast into an ingot or directly su...

Embodiment 2

[0023] According to the ratio of Al-12.0Si-9.0Zn-2.0Cu-0.5Fe-0.4Mn-0.85Mg-0.08Be-0.02Sr as an example, the mass of raw materials required for 35t alloy is calculated and prepared.

[0024] (1) Clean the furnace and prepare raw materials according to the ratio of alloy composition;

[0025] (2) Put industrial pure aluminum, Al-Si master alloy, Al-Cu, Al-Mn, Al-Fe master alloy, etc. into the furnace together, and raise the temperature to 730°C;

[0026] (3) After the alloy is completely melted, adjust the temperature of the molten aluminum to 700°C, add Zn ingots, Mg ingots and Al-Be master alloys packed in aluminum foil; use high-purity inert gas as a carrier to spray the refining agent into the melt , to degas and remove impurities, and remove slag after standing for 15 minutes;

[0027] (4) Add the prepared Al-Sr modifier into the aluminum melt, and fully stir the melt with a tool. After standing for 30 minutes, it is cast into an ingot or directly supplied to die-casting mo...

Embodiment 3

[0030] According to the ratio of Al-10.0Si-7.0Zn-1.5Cu-0.3Fe-0.5Mn-1.0Mg-0.1Be-0.03Sr as an example, the mass of raw materials required for 35t alloy is calculated and prepared.

[0031] (1) Clean the furnace and prepare raw materials according to the ratio of alloy composition;

[0032] (2) Put industrial pure aluminum, Al-Si master alloy, Al-Cu, metal manganese, Al-Fe master alloy, etc. into the furnace together, and raise the temperature to 720°C;

[0033] (3) After the alloy is completely melted, adjust the temperature of the molten aluminum to 700°C, add Zn ingots, Mg ingots and Al-Be master alloys packed in aluminum foil; use high-purity inert gas as a carrier to spray the refining agent into the melt , to degas and remove impurities, and remove slag after standing for 15 minutes;

[0034] (4) Add the prepared Al-Sr modifier into the aluminum melt, and fully stir the melt with a tool. After standing for 30 minutes, it is cast into an ingot or directly supplied to die-cast...

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Abstract

The invention discloses a high strength and toughness material of an aluminum alloy die casting. The alloy material is prepared from the chemical components in percent by weight: 10.0-12.0% of Si, 7.0-9.0% of Zn, 1.5-2.5% of Cu, 0.8-1.1% of Mg, 0.3-0.5% of Mn, 0.3-0.5% of Fe, 0.05-0.2% of Be, 0.01-0.05% of Sr, less than or equal to 0.15% of impurity elements and the balance Al.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to an aluminum alloy die-casting high-strength and tough material and a preparation method thereof. Background technique [0002] The automobile industry is one of the pillar industries of my country's national economy. With the continuous improvement of automobile fuel efficiency, energy saving and environmental protection requirements, new energy vehicles have become the mainstream of global automobile development. my country's "Energy Conservation and New Energy Vehicle Industry Development Plan (2012-2020)" clearly states that new energy vehicles are the focus of future development, and efficient use of energy and cruising range become the key. The use of lightweight and high-strength materials is one of the important methods to achieve lightweight in the automotive industry. Among them, aluminum alloy has the characteristics of high specific strength and rigidity, good corrosion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/04C22C1/03C22C1/06
CPCC22C1/026C22C1/03C22C1/06C22C21/04
Inventor 邓展昌
Owner 佛山鑫溢腾兴新材料科技有限公司
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