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Aluminum alloy and casting method thereof

A technology of aluminum alloy and molten aluminum, applied in the field of aluminum alloy materials, can solve the problems of increasing the trouble of composition adjustment, high melting point of pure silicon element, and high impurity content, and achieves a solution that is conducive to lean management, reduces impurity content, and contains less impurities. Effect

Active Publication Date: 2019-04-12
苏州铭恒金属材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high melting point of pure silicon element (1414°C), it is not easy to diffuse in the aluminum liquid, and it is difficult to mix evenly in the aluminum liquid, resulting in element segregation; moreover, the direct use of pure silicon or instant silicon, due to its high impurity content, will cause aluminum liquid The impurity content in the aluminum alloy increases, which increases the trouble for the subsequent composition adjustment; moreover, if pure silicon or instant silicon is directly added, Mg is easy to be produced in the aluminum liquid 2 Si and Al 10 mn 2 Si and other by-products, resulting in solid solution precipitation and element segregation
The aluminum alloy ingots produced in this way are processed into profiles after subsequent processing. After anodic corrosion, black wires and black lines will appear on the surface of the aluminum alloy profiles, resulting in a decline in product quality or even scrapping.

Method used

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  • Aluminum alloy and casting method thereof
  • Aluminum alloy and casting method thereof
  • Aluminum alloy and casting method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] (1) Preparation of aluminum alloy silicon ingot:

[0076] Table 1 is the element content table of the aluminum alloy silicon ingot prepared by default.

[0077] Table 1. Content % of each element in aluminum alloy silicon ingot

[0078]

[0079] Concrete preparation steps are as follows:

[0080] 1. Raw material melting: put aluminum ingots (70%) and scrap (grade 1 scrap, 6-series aluminum alloy rod head and tail / soup / excess waste) (30%) into the melting furnace for melting;

[0081] 2. Pure silicon smelting: After the raw materials are melted, the temperature of the molten aluminum is controlled at 750°C, and pure silicon (grade 441) is added;

[0082] 3. Refining: for the first refining, the amount of refining agent is 0.2kg / ton of aluminum, the nitrogen pressure is 0.15mpa, the purity of nitrogen is ≥99.96%, and the refining time is 15min / time;

[0083] 4. Composition analysis: remove slag from the refined aluminum liquid, and then take samples for spectral ana...

Embodiment 2

[0147] Table 1. Contents of elements in aluminum alloy silicon ingots

[0148]

[0149]

[0150] (1) Preparation of aluminum alloy silicon ingot:

[0151] 1. Raw material melting: put aluminum ingots (80%) and scrap (grade 1 scrap, 6-series aluminum alloy rod head and tail / soup / excess scrap) (20%) into the melting furnace for melting;

[0152] 2. Pure silicon smelting: After the raw materials are melted, control the temperature of the molten aluminum to 800°C, and add pure silicon (grade 441);

[0153] 3. Refining: for the first refining, the amount of refining agent is 1.2kg / ton of aluminum, the nitrogen pressure is 0.45mpa, the nitrogen purity is ≥99.96%, and the refining time is 30min / time;

[0154] 4. Composition analysis: remove slag from the refined aluminum liquid, and then take samples for spectral analysis;

[0155] 5. Composition adjustment: According to the results of spectral analysis, calculate the content of each element in the aluminum liquid, compare it...

Embodiment 3

[0186] 1. Preparation of aluminum alloy silicon ingot

[0187] Table 1. Contents of elements in aluminum alloy silicon ingots

[0188]

[0189] The specific preparation steps of aluminum alloy silicon ingot are as follows:

[0190] 1. Raw material melting: put aluminum ingots (80%) and scrap (grade 1 scrap, 6-series aluminum alloy rod head and tail / soup / excess scrap) (20%) into the melting furnace for melting;

[0191] 2. Pure silicon smelting: After the raw materials are melted, control the temperature of the molten aluminum to 780°C, and add pure silicon (grade 441);

[0192] 3. Refining: for the first refining, the amount of refining agent is 0.8kg / ton of aluminum, the pressure of nitrogen is 0.35mpa, the purity of nitrogen is ≥99.96%, and the refining time is 25min / time;

[0193] 4. Composition analysis: remove slag from the refined aluminum liquid, and then take samples for spectral analysis;

[0194] 5. Composition adjustment: According to the results of spectral a...

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Abstract

The invention provides an aluminum alloy and a casting method thereof. According to the aluminum alloy and the casting method thereof, pure silicon is added into molten aluminum, an aluminum alloy silicon ingot is acquired, and the manufactured silicon ingot serves as an intermediate alloy to be added into the molten aluminum so that an aluminum alloy cast ingot can be acquired. According to the aluminum alloy and the casting method thereof, purification treatment of the pure silicon and a homogenizing working procedure are added, the content of impurities in the molten aluminum is reduced, moreover, due to the fact that the aluminum alloy silicon ingot is the intermediate alloy, the melting point is low, during component adjusting, Si elements are scattered more uniformly, segregation ofthe Si elements is greatly eliminated, and the acquired cast ingot is more uniform in component.

Description

technical field [0001] The invention relates to the field of aluminum alloy materials, in particular to an aluminum alloy and a casting method thereof. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal structural material in industry, and has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry. Among them, the 6-series aluminum alloy, also known as "aluminum-magnesium-silicon alloy", is a heat-treated corrosion-resistant aluminum alloy with high strength and corrosion resistance and good uniformity. Especially important, mainly for extruded profiles. [0003] Among the 6-series aluminum alloy products, the aluminum profile shell is usually a shell processed on the aluminum alloy profile, which has high flexibility and can be cut arbitrarily. Generally, there is a circuit board card slot inside, as long as the circuit board can be inserted directly, no need to fix it again, the...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C1/03C22C21/02B22D11/00C22C1/06C22F1/043
CPCB22D11/003C22C1/026C22C1/03C22C1/06C22C21/02C22F1/043
Inventor 周作江
Owner 苏州铭恒金属材料科技有限公司
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