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A production process of an aluminum alloy round tube with a wall thickness of 0.9-1mm

A production process and technology of aluminum alloy, applied in the field of production process of aluminum alloy round pipe, can solve the problems of wall thickness not too thin, cracking, cracking, warping skin, etc., to achieve the effect of improving ductility

Active Publication Date: 2019-03-19
江苏宏基铝业科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There are many kinds of aluminum alloy round tubes with different specifications. Because of their light weight and high strength, they are widely used in all walks of life. Aluminum alloy round tubes are often bent into various shapes to achieve different functions. However, the tube wall is thin Aluminum alloy round tubes are prone to cracking and warping during the bending process, resulting in material loss or affecting the appearance of the product. Therefore, the wall thickness of aluminum alloy round tubes that need to be bent should not be too thin. The wall thickness is greater than 1.2mm. If it is thinner, it is easy to crack and warp during the bending process. As a result, the products after bending are relatively heavy, and the advantages of light weight of aluminum alloy are lost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A production process of an aluminum alloy round tube with a wall thickness of 0.9 to 1 mm, comprising the following steps:

[0018] a: An aluminum alloy rod whose weight components are: Si: 0.32%, Mg: 0.5%, Cr: 0.02%, unavoidable impurities: less than 0.1%, and the balance is Al, heated to 470°C;

[0019] b. Heat the barrel of the extrusion equipment to 400°C, put the aluminum alloy rod obtained in step a into the barrel, and extrude from the die end at a speed of 0.6m / min to obtain a round tube;

[0020] c. Immerse the round tube in step b in water with a temperature of 70°C to lower the temperature to the water temperature, then take it out, air-cool it to below 30°C, and then use a pulling and stretching device to axially stretch the two ends of the round tube to make the round tube The axial extension of the tube is not more than 2%;

[0021] d, keeping the round tube in the stretched state of step c for 24 hours at room temperature;

[0022] e. Quenching the roun...

Embodiment 2

[0024] A production process of an aluminum alloy round tube with a wall thickness of 0.9 to 1 mm, comprising the following steps:

[0025] a: Take the aluminum alloy rod whose weight components are: Si: 0.32%, Mg: 0.5%, Cr: 0.02%, unavoidable impurities: less than 0.1%, and the balance is Al, and heat it to 480°C;

[0026] b. Heat the barrel of the extrusion equipment to 400°C, put the aluminum alloy rod obtained in step a into the barrel, and extrude from the die end at a speed of 0.6m / min to obtain a round tube;

[0027] c. Immerse the round tube in step b in water with a temperature of 20°C to lower the temperature to below 30°C, and then use a pulling device to axially stretch the two ends of the round tube so that the axial extension of the round tube is not more than 2 %;

[0028] d, keep the round tube in the stretched state of step c for 36 hours at room temperature;

[0029] e. Quenching the round tube completed in step d, heating the round tube to 200°C with a resi...

Embodiment 3

[0031] A production process of an aluminum alloy round tube with a wall thickness of 0.9 to 1 mm, comprising the following steps:

[0032] a: An aluminum alloy rod whose weight components are: Si: 0.32%, Mg: 0.5%, Cr: 0.02%, unavoidable impurities: less than 0.1%, and the balance is Al, heated to 490°C;

[0033] b. Heat the barrel of the extrusion equipment to 400°C, put the aluminum alloy rod obtained in step a into the barrel, and extrude from the die end at a speed of 0.6m / min to obtain a round tube;

[0034] c. Immerse the round tube in step b in water with a temperature of 0°C to lower the temperature below 30°C, and then use a traction and stretching device to axially stretch the two ends of the round tube so that the axial extension of the round tube is no more than 2 %;

[0035] d, keep the round tube in the stretched state of step c for 48 hours at room temperature;

[0036] e. Quenching the round tube completed in step d, heating the round tube to 210°C with a resi...

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Abstract

The invention discloses a production process of an aluminum alloy round pipe with a wall thickness of 0.9-1 mm, comprising the following steps: a. The weight components are: Si: 0.32-0.35%, Mg: 0.5-0.6%, Cr: 0.02 ‑0.05%, unavoidable impurities: less than 0.1%, aluminum alloy rod with the balance being Al, heated to 470‑490°C; b, heating the barrel of the extrusion equipment to 400°C, and the aluminum alloy obtained in step a Put the rod into the barrel and extrude from the die end at a speed of 0.6m / min to obtain a round tube; c. After the temperature of the round tube in step b drops below 30°C, stretch the round tube axially to make it axially The elongation is not more than 2%; d, keep the round tube in the stretched state of step c for 24-48 hours at room temperature; e, quench the round tube after step d, heat the round tube to 190-210°C, and keep it warm for 3- 4 hours, then air cooled to room temperature. Through the above process, the ductility of the aluminum alloy round tube with a wall thickness of 0.9-1mm can be improved, so that no cracking or warping occurs during the bending process, and the bending part realizes a smooth transition without leaving creases.

Description

technical field [0001] The invention relates to a production process of an aluminum alloy round tube, in particular to a production process of an aluminum alloy round tube with a wall thickness of 0.9-1mm. Background technique [0002] There are many kinds of aluminum alloy round tubes with different specifications. Because of their light weight and high strength, they are widely used in all walks of life. Aluminum alloy round tubes are often bent into various shapes to achieve different functions. However, the tube wall is thin Aluminum alloy round tubes are prone to cracking and warping during the bending process, resulting in material loss or affecting the appearance of the product. Therefore, the wall thickness of aluminum alloy round tubes that need to be bent should not be too thin. If the wall thickness is greater than 1.2mm, then it is easy to crack and warp during the bending process, so the products after bending are relatively heavy, and the advantages of light we...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C23/08C22C21/08C22F1/047
CPCB21C23/085C22C21/08C22F1/002C22F1/047
Inventor 赵晋城
Owner 江苏宏基铝业科技股份有限公司