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Process for producing thin-walled aluminum alloy tube material

An aluminum alloy pipe and process technology, applied in the field of aluminum alloy manufacturing, can solve problems such as excessive dimensional tolerance, substandard mechanical properties, and pipe deformation, and achieve the effects of small dimensional deviation, meeting the use requirements, and excellent comprehensive mechanical properties

Active Publication Date: 2014-02-26
CHINA ZHONGWANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when using the above method to deal with thin-walled (especially wall thickness less than 5mm, diameter greater than 150mm) 6082 aluminum alloy pipes, there are often problems such as serious pipe deformation, excessive dimensional tolerances, and substandard mechanical properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The process for producing thin-walled aluminum alloy pipes in this example includes composition optimization, casting billet, extrusion molding, quenching, stretching and straightening, and aging treatment steps. After composition optimization, the alloy composition is as follows: Si: 0.55wt%, Fe: 0.38wt%, Cu: 0.17wt%, Mn: 0.11wt%, Mg: 0.88wt%, Cr: 0.15wt%, Zn: 0.09wt%, Ti: 0.11wt%, Al: balance. The quenching step is carried out in two steps, the first step is high-pressure water mist quenching, the second step is water cooling quenching; the profile exits the die mouth and enters the quenching zone, firstly adopts water mist quenching at the die exit to cool and shape the extruded pipe , and then use water penetration treatment to ensure product formability and mechanical properties.

[0016] As an improvement of this embodiment, the extrusion speed in the extrusion molding step is 3.5 m / min, the casting rod temperature is 540° C., the mold temperature is 500° C., and ...

Embodiment 2

[0020] The process for producing thin-walled aluminum alloy pipes in this example includes composition optimization, casting billet, extrusion molding, quenching, stretching and straightening, and aging treatment steps. After composition optimization, the alloy composition is as follows: Si: 0.65wt%, Fe: 0.32wt%, Cu: 0.25wt%, Mn: 0.09wt%, Mg: 0.98wt%, Cr: 0.06wt%, Zn: 0.11wt%, Ti: 0.09wt%, Al: balance. The quenching step is carried out in two steps, the first step is high-pressure water mist quenching, the second step is water cooling quenching; the profile exits the die mouth and enters the quenching zone, firstly adopts water mist quenching at the die exit to cool and shape the extruded pipe , and then use water penetration treatment to ensure product formability and mechanical properties;

[0021] As an improvement of this embodiment, the extrusion speed in the extrusion molding step is 4.5 m / min, the casting rod temperature is 525° C., the mold temperature is 520° C., and ...

Embodiment 3

[0025] The process for producing thin-walled aluminum alloy pipes in this example includes composition optimization, casting billet, extrusion molding, quenching, stretching and straightening, and aging treatment steps. After composition optimization, the alloy composition is as follows: Si: 0.58wt%, Fe: 0.35wt%, Cu: 0.24wt%, Mn: 0.10wt%, Mg: 0.90wt%, Cr: 0.13wt%, Zn: 0.10wt%, Ti: 0.10wt%, Al: balance. The quenching step is carried out in two steps, the first step is high-pressure water mist quenching, the second step is water cooling quenching; the profile exits the die mouth and enters the quenching zone, firstly adopts water mist quenching at the die exit to cool and shape the extruded pipe , and then use water penetration treatment to ensure product formability and mechanical properties;

[0026] As an improvement of this embodiment, the extrusion speed in the extrusion molding step is 3.8 m / min, the casting rod temperature is 530° C., the mold temperature is 517° C., and ...

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Abstract

The invention discloses a process for producing a thin-walled aluminum alloy tube material. The process comprises the steps of composition optimization, casting for blank preparation, extrusion molding, quenching, stretching and straightening and aging treatment; after composition optimization, the alloy comprises the following composition: 0.55-0.65 wt% of Si, 0.32-0.38 wt% of Fe, 0.17-0.25 wt% of Cu, 0.09-0.11 wt% of Mn, 0.88-0.98 wt% of Mg, 0.06-0.15 wt% of Cr, 0.09-0.11 wt% of Zn, 0.09-0.11 wt% of Ti, and the balance being Al; the quenching step is carried out by two steps, the first step is to adopt high pressure water mist quenching, and the second step is to adopt a water cooling mode to quench. The aluminum alloy tube material produced by the process has small size deviation, and has excellent comprehensive mechanical properties, wherein the yield strength is not less than 270 MPa, the tensile strength is not less than 340 MPa, and the elongation rate after fracture is not less than 10%.

Description

technical field [0001] The invention belongs to the field of aluminum alloy manufacturing, and relates to a process for producing aluminum alloy pipes, in particular to a process for producing thin-walled aluminum alloy pipes. Background technique [0002] Aluminum alloy has the advantages of light weight, high strength, good wear resistance, and not easily deformed after processing. It is widely used in automobiles, aerospace, shipping and other fields. 6082 aluminum alloy is often used in the production of pipes. Due to its special composition and high quenching sensitivity, it is often heat treated by rapid cooling and increasing the degree of supercooling. However, when using the above method to deal with thin-walled (especially wall thickness less than 5mm, diameter greater than 150mm) 6082 aluminum alloy pipes, there are often problems such as serious pipe deformation, excessive dimensional tolerances, and substandard mechanical properties. [0003] Therefore, it is n...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22F1/047
Inventor 李延军庞俊铭王笠玮王浩周丹桐朱恒双
Owner CHINA ZHONGWANG
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