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Aluminum alloy material, aluminum alloy hollow pipe and preparation method of aluminum alloy hollow pipe

An aluminum alloy material and aluminum alloy technology, which is applied in the field of aluminum alloy pipe processing, can solve the problems of complex preparation process and low mechanical properties of aluminum alloy hollow pipes, so as to improve productivity, reduce extrusion and stabilized annealing steps, and ensure excessive effect of coldness

Pending Publication Date: 2022-04-05
YANTAI NANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an aluminum alloy material, an aluminum alloy hollow tube and a preparation method thereof, so as to solve the problems that the existing aluminum alloy hollow tubes have low mechanical properties and complicated preparation process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment provides an aluminum alloy hollow tube, the tube material is Al-2.3Mg-0.3Mn-0.04Ti-0.25Si-0.15Fe aluminum alloy material, and its preparation method includes the following steps:

[0038] (1) Smelting pure aluminum, aluminum-manganese alloy (10%), and aluminum-silicon alloy (20%) at 745°C, after it is completely melted, control the temperature to 720°C, add pure magnesium, and after the pure magnesium is completely melted, Keep warm at 700°C for 6 minutes to make the molten liquid static and stable; then add Al-5Ti-B wire and pour it into the mold, crystallize and cool (cooling rate is 215°C / s), and then use the dummy tube to pull the tube blank down Move and pull out the tube blank;

[0039] (2) The tube blank was annealed at 560° C. for 12 hours to obtain an aluminum alloy hollow tube with a thickness of 12 mm and an outer diameter of 110 mm.

[0040] The mechanical properties of the aluminum alloy material prepared above were measured according to GB...

Embodiment 2

[0042] This embodiment provides an aluminum alloy hollow tube, the tube material is Al-2.2Mg-0.3Mn-0.03Ti-0.2Si-0.15Fe aluminum alloy material, and its preparation method includes the following steps:

[0043] (1) Smelting pure aluminum, aluminum-manganese alloy (12%), and aluminum-silicon alloy (20%) at 780°C, after it is completely melted, control the temperature to 730°C, add pure magnesium, and after the pure magnesium is completely melted, Insulate at 690°C for 8 minutes to make the molten liquid static and stable; then add Al-5Ti-B wire and pour it into the mold, crystallize and cool (cooling rate is 207°C / s), and then use the fake tube to pull the tube blank down Move and pull out the tube blank;

[0044] (2) The tube blank was annealed at 520° C. for 20 hours to obtain an aluminum alloy hollow tube with a thickness of 10 mm and an outer diameter of 110 mm.

[0045] The mechanical properties of the aluminum alloy material prepared above were measured according to GB / T 24...

Embodiment 3

[0047] This embodiment provides an aluminum alloy hollow pipe, the pipe material is Al-2.25Mg-0.25Mn-0.03Ti-0.2Si-0.15Fe aluminum alloy material, and its preparation method includes the following steps:

[0048] (1) Smelting pure aluminum, aluminum-manganese alloy (11%), and aluminum-silicon alloy (23%) at 720°C, after it is completely melted, control the temperature to 724°C, add pure magnesium, and after the pure magnesium is completely melted, Keep warm at 700°C for 4 minutes to make the molten liquid static and stable; then add Al-5Ti-B wire and pour it into the mold, crystallize and cool (cooling rate is 230°C / s), and then use the dummy tube to pull the tube blank down Move and pull out the tube blank;

[0049] (2) The tube blank was annealed at 570° C. for 9 hours to obtain an aluminum alloy hollow tube with a thickness of 14 mm and an outer diameter of 125 mm.

[0050] According to GB / T 24182-2009, the mechanical properties of the aluminum alloy material prepared above...

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Abstract

The invention belongs to the technical field of aluminum alloy pipe machining, and discloses an aluminum alloy material, an aluminum alloy hollow pipe and a preparation method of the aluminum alloy hollow pipe. The aluminum alloy material comprises the following components: 2.0 to 2.5 percent of Mg, 0.1 to 0.5 percent of Mn, 0.01 to 0.05 percent of Ti, 0.15 to 0.25 percent of Si, less than or equal to 0.2 percent of Fe and the balance of Al. The aluminum alloy hollow pipe is prepared in a continuous casting mode, traditional extrusion and stabilizing annealing steps are reduced, the mechanical property of the prepared pipe meets the use requirement, and the productivity is improved; and the heating system and the casting system adopt forced heating and forced cooling systems, so that the temperature gradient of a solid-liquid surface is ensured, the degree of supercooling is ensured, alloy grains are refined, and compared with an aluminum alloy pipe prepared by a semi-continuous casting method, the mechanical property is improved by 10%-15%.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy tube processing, in particular to an aluminum alloy material, an aluminum alloy hollow tube and a preparation method thereof. Background technique [0002] Aluminum alloy is widely used in various structural materials because of its low density, high specific strength and corrosion resistance. The use of aluminum alloy pipes requires medium strength and high corrosion resistance, so 6 series aluminum alloys are used to manufacture aluminum alloy hollow pipes. The main alloying elements of 6-series aluminum alloys are Mg and Si. It is found that by adding a small amount of Mn element, Al 6 (Mn, Fe) phase can improve the corrosion resistance and solid solution strengthening effect of aluminum alloy pipes. However, the existing aluminum alloy pipes have low mechanical properties and cannot meet the use of complex working conditions. For example, the aluminum alloy pipe disclosed in patent C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08B22C9/24C22C1/02C22C1/03C22F1/047F16L9/02
Inventor 陈健张涛张日强沙漫漫王明明高静王胜
Owner YANTAI NANSHAN UNIV
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