Heat treatment method of aluminum alloy panel
A heat treatment method and technology for aluminum alloy plates, applied in the direction of metal rolling, etc., can solve the problems of the deterioration of the surface quality of the plate and the insufficient moldability of the outer plate to meet the design needs.
Inactive Publication Date: 2010-01-27
HYUNDAI MOTOR CO LTD
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Problems solved by technology
[0004] However, aluminum-magnesium alloy sheets have a problem in that they show tensile strain lines formed on their surface caused by the interaction between The process leads to plastic deformation and Al-Si precipitation, that is, due to the dynamic strain aging (dynamic strain aging) and non-uniform deformation caused by the strain during the deformation process around the precipitation formed by the precipitation of alloying elements, The above alloying elements are added to obtain high elongation and high formability
However, the moldability of the outer panels is insufficient to accommodate the design needs
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[0021] Reference will now be made in detail to embodiments of the invention, examples of which are illustrated in the accompanying drawings and described below. While the invention will be described in conjunction with exemplary embodiments, it will be understood that present description is not intended to limit the invention to those exemplary embodiments. On the contrary, the invention is intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents and other implementations, which may be included within the spirit and scope of the invention as defined by the appended claims. Way.
[0022] The present invention provides a heat treatment method in which a simple heat treatment process is applied to an aluminum-magnesium alloy plate in order to reduce surface waviness formed by dynamic strain aging, facilitate the molding process, and obtain high strength characteristics by work hardening after molding .
[0023] In other wor...
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Abstract
The present invention provides a heat treatment method of an aluminum alloy panel, which can prevent surface curvature of molded aluminum alloy panel. For this purpose, the present heat treatment methods comprise: cold rolling an aluminum alloy panel at a reduction ratio of 45 to 50% at a final pass in a cold rolling process; first heat-treating the cold-rolled aluminum alloy panel at 450 to 510 DEG C. for 3 hours; rapidly cooling the heat-treated aluminum alloy panel at a rate 60 DEG C. / sec or higher after the first heat treatment; and second heat-treating the rapidly cooled aluminum alloy panel at 200 to 220 DEG C.
Description
technical field [0001] The invention relates to a heat treatment method for an aluminum alloy plate. More particularly, the present invention relates to a heat treatment method of an aluminum alloy sheet that prevents the formation of surface curvature that may occur when the aluminum alloy sheet is molded. Background technique [0002] Aluminum alloys for vehicle outer panels are 5xxx (aluminum-magnesium) and 6xxx (aluminum-magnesium-silicon) series alloys, and these panels are formed to have a thickness of up to 2mm to increase strength and hardness. [0003] In terms of moldability, aluminum-magnesium alloys are superior to aluminum-magnesium-silicon alloys, and are applied to inner and outer panels having complex shapes. [0004] However, aluminum-magnesium alloy sheets have a problem in that they show tensile strain lines formed on their surface caused by the interaction between The process leads to plastic deformation and Al-Si precipitation, that is, due to the dyna...
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IPC IPC(8): C22F1/04C22F1/047
CPCC22F1/047C22C21/06B21B3/00
Inventor 洪承贤郑裕东
Owner HYUNDAI MOTOR CO LTD