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4XXX series aluminum alloy and preparation method thereof

A technology of aluminum alloy and raw materials, applied in the field of aluminum alloy, can solve the problems of low tensile strength, achieve the effects of increasing strength, reducing temperature loss, and optimizing casting conditions

Inactive Publication Date: 2021-04-09
ASIA PACIFIC LIGHT ALLOY NANTONG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The 4XXX series aluminum alloys of the prior art have low tensile strength and cannot meet the needs of the prior art. Therefore, there is an urgent need for a 4XXX series aluminum alloy and a preparation method thereof to prepare an aluminum alloy with higher tensile strength

Method used

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  • 4XXX series aluminum alloy and preparation method thereof

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preparation example Construction

[0022] Please refer to figure 1 , which shows a schematic flow chart of the steps of the method for preparing a 4XXX aluminum alloy according to an embodiment of the present application. Prepare 4XXX aluminum alloys according to the raw materials weighed above, and the preparation method 1 of 4XXX aluminum alloys includes the following steps 101 to 104, wherein:

[0023] Step 101, smelting and refining raw materials. Put the raw materials into the melting furnace, perform the melting process, set the melting temperature of the melting furnace to 720-770°C, melt the raw materials until they are completely melted, and form aluminum liquid. The melting temperature can be set to 720°C, 740°C or 760°C, but This is not the limit. Then execute the refining program, set the refining temperature to 720-740°C, set the refining time to 20-40min, and refine the melted raw material (aluminum liquid). The refining temperature can be set to 720°C, 730°C or 740°C. The specific time can be ...

Embodiment 1

[0030] 1. Weigh the raw material according to the mass percentage of 4XXX aluminum alloy. The mass percentage of the raw material is 12.2% Si, 3.52% Cu, 0.25% Mn, 0.62% Mg, 0.06% Ti, 1.87% Ni , 0.023% of Sr, 0.139% of Fe, 0.0086% of Ca, 0.0002% of P, and the rest of Al;

[0031] 2. Add the above-mentioned weighed raw materials into the melting furnace, melt and refine at 760±5°C to obtain the aluminum alloy melt;

[0032] 3. The convection tank, degassing box, and filter box mold plate are electrically heated and baked. The electric heating temperature is set at 850°C. After baking to 740-780°C, the aluminum alloy melt is cast horizontally on the hot top, and the casting The temperature is 750-760°C, the casting speed is 70-85mm / min, the cooling water flow rate is 4000-5000L / min, and the aluminum alloy solid round ingot is obtained after casting;

[0033] 4. Execute the homogenization process, in which the heating temperature is 470-490 ° C, the holding time is 3 hours, and a...

Embodiment 2

[0036] 1. Weigh the raw material according to the mass percentage of 4XXX aluminum alloy. The mass percentage of the raw material is 11.8% Si, 3.61% Cu, 0.23% Mn, 0.58% Mg, 0.044% Ti, 1.86% Ni , 0.022% of Sr, 0.172% of Fe, 0.0062% of Ca, 0.0002% of P, and the rest of Al;

[0037] 2. Add the above-mentioned weighed raw materials into the melting furnace, melt and refine at 760±5°C to obtain the aluminum alloy melt;

[0038] 3. The convection tank, degassing box, and filter box mold plate are electrically heated and baked. The electric heating temperature is set at 850°C. After baking to 740-780°C, the aluminum alloy melt is cast horizontally on the hot top, and the casting The temperature is 750-760°C, the casting speed is 70-85mm / min, the cooling water flow rate is 4000-5000L / min, and the aluminum alloy solid round ingot is obtained after casting;

[0039] 4. Execute the homogenization process, in which the heating temperature is 470-490 ° C, the holding time is 3 hours, and ...

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Abstract

The invention relates to a 4XXX series aluminum alloy and a preparation method thereof. The 4XXX series aluminum alloy comprises the following components in percentage by mass: 11.0%-13.0% of silicon; 3.3% to 4.0% of copper; 0.2%-0.4% of manganese; 0.5%-0.7% of magnesium; 0.02% to 0.15% of titanium; 1.5%-2.5% of nickel; 0.02% to 0.03% of strontium; less than or equal to 0.5% of iron; less than or equal to 0.01% of calcium; less than or equal to 0.002% of phosphorus; and balance of aluminum. The preparation method of the 4XXX series aluminum alloy comprises the following steps of weighting raw materials; smelting the raw materials until the raw materials are completely smelted, and then refining the smelted raw materials; standing the refined raw materials, and carrying out online degassing and two-stage filtration on the raw materials subjected to standing; casting the raw materials by adopting a hot-top horizontal casting process to form a bar; and homogenizing and cooling the bar. By optimizing the components of the 4XXX series aluminum alloy, the capacity of the alloy for separating out a strengthening phase is improved, and therefore the strength of the product is improved.

Description

technical field [0001] The present application relates to an aluminum alloy, in particular to a 4XXX series aluminum alloy and a preparation method thereof. Background technique [0002] 4XXX series aluminum alloys are aluminum alloys with silicon as the main alloying element. This series of alloys is mainly used for Manufacture of aluminum alloy forgings. [0003] During the process of implementing this application, the applicant found that the prior art has at least the following problems: [0004] The tensile strength of the 4XXX series aluminum alloys in the prior art is low and cannot meet the requirements of the prior art. Therefore, there is an urgent need for a 4XXX series aluminum alloy and a preparation method thereof to prepare an aluminum alloy with a higher tensile strength. Contents of the invention [0005] In order to solve the above-mentioned technical problems in the prior art, the embodiments of the present application provide a 4XXX series aluminum al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/02C22F1/043
CPCC22C1/026C22C21/02C22F1/043
Inventor 吴桂兰李其荣浦俭英
Owner ASIA PACIFIC LIGHT ALLOY NANTONG TECH