Method for producing aluminium alloy composite tube, bar and wire rod

A technology for composite pipes and aluminum alloys, which is applied in the field of rods and wires to produce aluminum alloy composite pipes, and can solve problems such as low production efficiency, low yield, and high labor intensity.

Active Publication Date: 2017-01-04
大连黄海铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, among the urgently needed products in these industries, only the header used in the parallel flow heat exchanger is a composite aluminum alloy material that can be produced in the industry at present, and its production method is to use the method of extrusion of large tubes and small tubes, which leads to Its yield is very low, only about 30%, and it has the disadvantages of high production cost, high labor intensity and low production efficiency.

Method used

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  • Method for producing aluminium alloy composite tube, bar and wire rod
  • Method for producing aluminium alloy composite tube, bar and wire rod
  • Method for producing aluminium alloy composite tube, bar and wire rod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The production of aluminum alloy composite oval pipes with Al-1.3Mn-0.1Cu in O state as the core material and Al-20Si as the skin material,

[0025] Table 1

[0026]

[0027] The production steps are as follows:

[0028]Melting, as shown in Table 1, adding 0.1% Cu, 1.3% Mn and 98.6% Al into the core material melting furnace for smelting, the core material melting temperature is controlled at 20°C higher than the core material melting point. The core aluminum alloy melt is refined and filtered in the furnace; as shown in Table 1, 20% Si and 80% Al by mass percentage are added to the skin material melting furnace for smelting, and the skin material melting temperature is controlled at 50°C higher than the melting point of the skin material, then add 0.1% of P and 0.7% of Cr to the melt in the aluminum alloy of the skin, carry out modification treatment, and refine and filter outside the furnace, the core material and skin Material smelting time is not more than 20 ho...

Embodiment 2

[0032] The production of aluminum alloy composite round pipes with Al-1.6Mn as the core material and Al-30Si-1.0Mn as the skin material in the H state,

[0033] table 3

[0034]

[0035] The production steps are as follows:

[0036] (1) Melting, as shown in Table 3, the mass percentage is 1.6% Mn and 98.4% Al is added in the core material smelting furnace for smelting, the core material melting temperature is controlled at 60 ℃ higher than the core material melting point, the core material The aluminum alloy melt is refined and filtered in the furnace; as shown in Table 3, 30% Si, 1.0% Mn and 69% Al are added to the leather melting furnace for smelting, and the leather smelting The temperature is controlled at 150°C higher than the melting point of the leather material, and then 0.1% of P and 0.7% of Cr are added to the melt in the aluminum alloy of the skin to carry out modification treatment, and refined and filtered outside the furnace. The smelting time of wood and le...

Embodiment 3

[0040] Al-1.0Mn-0.1Si-0.1Cu in T5 state is used as the core material, and Al-15Si-3.5Cu-0.85Fe is used as the skin material for the production of aluminum alloy composite rods.

[0041] table 5

[0042]

[0043] The production steps are as follows: (1) smelting, as shown in Table 5, adding 0.1% Si, 0.1% Cu, 1.0% Mn and 98.8% Al into the core material smelting furnace for smelting, the core material The smelting temperature is controlled at 40°C higher than the melting point of the core material, and the core material aluminum alloy melt is refined and filtered in the furnace; as shown in Table 5, the mass percentages are 15% Si, 0.85% Fe, 3.5% Cu and 80.65% Al are added to the leather melting furnace for smelting. The melting temperature of the leather is controlled at 100°C higher than the melting point of the leather, and then 0.2% of P and 0.2% Cr is modified, refined and filtered outside the furnace, and the smelting time of core material and skin material is not more ...

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Abstract

The invention relates to the technical field of non-ferrous metal processing. A method for producing an aluminium alloy composite tube, bar and wire rod comprises the following steps: 1, smelting, which comprises preparing aluminium alloy raw materials according to chemical compositions of a core material and a sheath and performing smelting in two smelting furnaces; 2, compounding and casting, which comprises pouring a core material melt to a core material crystallizer, pouring a sheath melt in a chamber formed between a core material solidification shell and a sheath crystallizer, and starting a machine for casting to obtain a composite cast rod or a tube blank; 3, homogenizing annealing, which comprises heating the composite cast rod or the tube blank to a homogenizing temperature; 4, hot working, in which the composite cast rod or the tube blank is subjected to saw cutting, skin turning, and heating, and performing backward extrusion to obtain the composite bar or performing piercing and backward extrusion to obtain the composite tube; 5, cold working, which comprises heating and drawing the composite tube or bar to obtain a composite tube or bar in an H state; and 6, controlling the product state, which comprises performing annealing heating to the composite tube or bar obtained in the step 4 to obtain a composite tube or bar in an O state. According to the method, the production cost is reduced, and the stability of product quality is ensured.

Description

technical field [0001] The invention relates to a method for producing aluminum alloy composite pipes, rods and wires, and belongs to the technical field of nonferrous metal processing. Background technique [0002] With the expansion of the application range of aluminum alloys, a single aluminum alloy cannot meet the existing needs. Therefore, aluminum alloy composite products have emerged, and brazing foils are the most widely used. At present, aluminum alloy composite products are concentrated in plates and foils, and there are no or few tubes, rods, and wires. [0003] Aluminum alloy composite pipes, rods, and wires are a multi-grade material obtained by combining various grades of aluminum alloys. It not only maintains the advantages of the original component grades of aluminum alloys, but also produces new properties that the original component grades of aluminum alloys do not have. performance to maximize its advantages. For example, the header used in the parallel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C21/02C22C21/10C22C21/16C22C21/06B22D19/16C22F1/04C22F1/043C22F1/053C22F1/057C22F1/047
CPCB22D19/16C22C21/00C22C21/02C22C21/06C22C21/10C22C21/16C22F1/04C22F1/043C22F1/047C22F1/053C22F1/057
Inventor 韩学礼秦仕政邵滋敏杨兆成许洪峰
Owner 大连黄海铝业有限公司
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