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Pretreatment process for automobile deformed aluminum alloy plate

A technology for deforming aluminum alloys and aluminum alloy sheets, which is applied in the field of pretreatment technology, can solve the problems of difficult automobile sheet formability requirements, difficult industrial production realization, and short time to aging, so as to achieve short time and optimize solid solution process , Improve the effect of stamping yield

Active Publication Date: 2009-07-08
HENAN SUDA ELECTRIC AUTOMOBILE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Obviously, only 6000 series heat-treatable aluminum alloys have the above properties, but such high-performance aluminum alloy sheets cannot be produced in China at present.
Tian Ni from Northeastern University has applied for a pretreatment process to improve the formability and bake hardenability of 6111 aluminum alloy car panels. However, 6111 is a relatively high-strength aluminum alloy with poor flanging ductility, and it is difficult to fully meet the formability of automotive panels. Requirements: Yucel Birol, a Turkish scholar, studied the preheating treatment of 6016 alloy at 60-200°C for 2-30 minutes within 10 minutes after solution quenching, and found that after solution treatment, only aging at 140-180°C for 10 minutes can obtain reasonable formability and bake hardenability, but the time from solid solution to aging is too short, and it is difficult to realize industrial production; Japan Kobe Company has systematically studied the aging and bake hardenability of 6k21, and the 6016 adjusted by appropriate components, its correlation Performance can meet the requirements of industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] 6022 0.9mm cold-rolled sheet, in the nitrate furnace at 520 ℃ temperature for solid solution heating and heat preservation for 30 minutes, quenched into 5% polyether water-soluble quenching medium, after cooling, aging at room temperature for 2 days, in the aging treatment furnace for 160 ℃ aging treatment for 10min. The plate was tested at room temperature for 3 months, and its performance is: yield strength σ y 130MPa, anti-garbage strength σ b 230MPa, elongation δ s 28%, tensile strain 2%, hemming 180° hemming is good. Tensile strain 2%, after baking and hardening in an oven at 175°C×20min, its performance is: σ y 210MPa, σ b 280MPa, 180° folded edge breaks.

Embodiment 2

[0012] 6022 0.9mm cold-rolled sheet, solid solution heating and heat preservation at 530°C for 30 minutes in a nitrate furnace, quenched into 7% polyether water-soluble quenching medium, aging at room temperature for 3 days after cooling, and aging treatment furnace at 150°C Aging treatment 10min. Placed at room temperature for 3 months, its performance has been tested as follows: σ y 125MPa, σ b 225MPa, δ s 28%, tensile strain 2%, 180° hemming is good. Store at room temperature for 4-5 months, σ y 145MPa, σ b 285MPa, δ s 28%, tensile strain 2%, hemming 180° hemming is good. Tensile strain 2%, after baking at 175℃×30min, σ y 215MPa, σ b 280MPa, 180° fold cracking.

Embodiment 3

[0014] 6022 0.9mm cold-rolled sheet, solid solution heating and heat preservation at 550°C for 30 minutes in a nitrate furnace, quenched into 10% polyether water-soluble quenching medium, aging at room temperature for 2 days after cooling, and aging treatment furnace at 140°C Aging treatment 15min. Placed at room temperature for 3 months, its performance has been tested as follows: σ y 120MPa, σ b 210MPa, δ s 29%, tensile strain 2%, 180° hemming is good. Tensile strain 2%, after baking in a baking oven at 175°C for 15min, its properties are: σ y 190MPa, σ b 260MPa, δ s 29%, 180° fold breaks.

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PUM

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Abstract

The invention relates to a technique of processing low-copper vehicle wrought aluminium alloy boards such as 6022, 6016 and the like, especially relates to a preprocessing technique for assuring baking hardenability and formability of vehicle wrought aluminium alloy boards.The preprocessing technique of vehicle wrought aluminium alloy boards is characterized by placing aluminum alloy boards into a furnace for solid solution treatment, 30 minutes after the solid solution heating and heat preserving under a temperature of 520 DEG C-550 DEG C, placing them into a polyether water-soluble medium of 5-10% for quenching, putting them in a room temperature for 2-3 days after being cooled, putting them into an aging treatment furnace for being treated for 10-15 minutes under a temperature of 140-170 DEG C. The invention which is a simple technique improves the yield strength, tensile strength and specific elongation of aluminum alloy boards, therefore, improving the formability, aging -resisting stability and baking hardenability of aluminum alloy boards, can achieve an satisfactory baking and overhardening effect on the existing oil paint line, improves rate of final products formed by pressing, reduces the pressing cost and promotes the application of aluminum boards in the lighteningof vehicles.

Description

technical field [0001] The invention relates to a processing technology for 6022, 6016 and other low-copper deformed aluminum alloy plates for automobiles, in particular to a pretreatment process for ensuring the formability and baking hardenability of deformed aluminum alloy plates for automobiles. Background technique [0002] With the development of the automobile industry, the production and ownership of automobiles have increased. While bringing convenience to people's travel, it has also caused three major problems: emissions, fuel energy consumption, and safety, especially the increase in automobile exhaust emissions and greenhouse gases. , bringing great difficulties to the commitment of the Kyoto Protocol. Governments all over the world attach great importance to energy saving, emission reduction and safety issues of automobiles, and have formulated relevant regulations to reduce automobile fuel consumption and emissions, and improve automobile safety, such as fuel ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04
Inventor 马鸣图游江海路洪洲毕祥玉李志刚
Owner HENAN SUDA ELECTRIC AUTOMOBILE TECH
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