A kind of aluminum alloy and casting method thereof

A technology of aluminum alloy and aluminum liquid, 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, increase of impurity content, etc., to achieve lean management, uniform diffusion of Si element, and reduction of impurity content Effect

Active Publication Date: 2021-08-13
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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  • A kind of aluminum alloy and casting method thereof
  • A kind of aluminum alloy and casting method thereof
  • A kind of 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. In the present invention, the aluminum alloy silicon ingot is firstly obtained by adding pure silicon to molten aluminum, and then the obtained silicon ingot is used as an intermediate alloy and added to the molten aluminum to obtain an aluminum alloy ingot. The invention also increases the purification treatment of pure silicon and the homogenization process, which not only reduces the impurity content in the aluminum liquid, but also because the aluminum alloy silicon ingot belongs to the intermediate alloy and has a low melting point, the diffusion of Si element is more uniform when the composition is adjusted, and the large The segregation of Si element is eliminated, and the obtained ingot is more uniform in composition.

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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Patent Type & Authority Patents(China)
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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