Method for improving bending performance of T5-state 6N01 aluminum alloy through local laser treatment

A bending performance, aluminum alloy technology, applied in the field of metal material processing, can solve the problems of changing the heat treatment state of aluminum alloy, low production efficiency, long processing time, etc., to achieve the effect of not reducing overall strength, improving bending performance, and short processing time

Inactive Publication Date: 2016-11-23
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the material returns to the T4 state and then plastic processing, although the bending performance can be improved, there are disadvantages such as low production efficiency, long processing time and high manufacturing cost.
[0004] Although the annealing process adopted in the literature ("Discussion on the Problem of Aluminum Alloy Bending and Cracking" The Ninth National Typical Parts Heat Treatment Academic and Technical Exchange Conference and the Sixth National Heat Treatment Society Physical Metallurgy Academic Exchange...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 6mm thick plate, use 200W high-energy laser to scan the tensile stress part of the material, the scanning speed is 15mm / s, the defocus amount is 15mm, and it is bent after cooling. The bending radius is 11.4mm, and the relative bending radius is 1.90. The bending performance is relatively Raised for untreated samples. After local aging treatment at 180°C×3h, samples were taken from the laser-treated part for mechanical property testing. The tensile strength was 277MPa and the elongation was 10.2%. After the overall aging treatment at 180°C×3h, samples were taken from the laser-treated part for mechanical performance testing. The tensile strength was 279MPa and the elongation was 10.1%.

Embodiment 2

[0023] 6mm thick plate, use 200W high-energy laser to scan the tensile stress part of the material, the scanning speed is 15mm / s, the defocus amount is 15mm, and it is bent after cooling. The bending radius is 11.4mm, and the relative bending radius is 1.90. The bending performance is relatively Raised for untreated samples. After an overall aging treatment at 180°C for 3 hours, samples were taken from the laser-treated part for mechanical performance testing. The tensile strength was 281MPa and the elongation was 10.2%.

Embodiment 3

[0025] For a 6mm thick plate, use a 350W high-energy laser to scan the tensile stress part of the material, the scanning speed is 15mm / s, the defocus is 15mm, and it is bent after cooling. The bending radius is 12.1mm, and the relative bending radius is 2.02. The bending performance is relatively Raised for untreated samples. After partial aging treatment at 180°C×3h, samples were taken from the laser-treated part for mechanical property testing. The tensile strength was 269MPa and the elongation was 11.0%.

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Abstract

The invention discloses a method for improving the bending performance of T5-state 6N01 aluminum alloy through local laser treatment. The method comprises the following steps that the plastic bending deformation portion of the material is found, and the laser scanning portion is determined; then, the laser scanning portion is scanned with a high-energy laser, wherein the laser power is 200-500 W, the scanning speed is 10-20 mm/s, and the defocusing amount is 10-20 mm; plastic bending is conducted on the processed material; and finally, precipitation heat treatment is conducted, wherein the temperature is 170-190 DEG C, and the temperature is kept for 2-4 hours. After the T5-state 6N01 aluminum alloy is treated through the method, the overall heat treatment state of the T5-state 6N01 aluminum alloy is not changed, the bending performance of the T5-state 6N01 aluminum alloy is improved, and the overall strength of the material is not lowered. Besides, the method has the remarkable advantages of being high in production efficiency, short in machining time, low in manufacturing cost and the like.

Description

technical field [0001] The invention relates to a method for improving the bending performance of a T5-state 6N01 aluminum alloy by using a high-energy laser, and belongs to the field of metal material processing. Background technique [0002] Aluminum alloy materials have the advantages of medium strength, high corrosion resistance, good plasticity, welding performance, and process performance. They are widely used in the manufacture of vehicle shells, large structural parts and decorative accessories, and play an important role in the lightweight field of vehicles. . At present, the body of bullet trains and subway vehicles mainly uses 6N01 aluminum alloy profiles, the heat treatment state is T5 and T6, and the strength can reach 250MPa. Vehicles running at high speeds have high requirements on machining accuracy, and the second phase strengthening phase of 6000 series aluminum alloys in the artificial aging state (T5) has been fully analyzed, resulting in low bending per...

Claims

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Application Information

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IPC IPC(8): C22F1/04
Inventor 孔见张鑫陈灿龙李建亮
Owner NANJING UNIV OF SCI & TECH
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