Pretreatment process for automobile deformed aluminum alloy plate

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

Pretreatment Process of Deformed Aluminum Alloy Sheet for Automobile technical field 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 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 ...

AI Technical Summary

Problems solved by technology

Obviously, only 6000 series heat-treatable aluminum alloys have the above properties, but such high-performance aluminum alloy plates 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; Turkish scholar YucelBirol studied the 6016 alloy for 60-200 ℃ 2-30min preheating treatment within 10 minutes after solution quenching, and found that after solution treatment, only aging at 140-180 ℃ 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 related properties of 6016 adjusted by appropriate components Can meet the requirements of industrial production