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Preparation method of high-formability aluminum alloy composite board material used for vehicle body external plate

A composite sheet and formability technology, which is applied in the field of preparation of high-formability aluminum alloy composite sheets for body panels, can solve the problems of incomplete crushing, bending performance, adverse effects, etc., and achieve the effect of promoting widespread use

Inactive Publication Date: 2018-06-29
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the deficiencies of the prior art, the present invention develops a car body for the problems that some coarse iron-rich phases in the Al-Mg-Si-Cu-Zn alloy are not completely broken and the remaining micro-cracks have an adverse effect on its bending performance. High formability aluminum alloy composite plate for outer plate and preparation method thereof

Method used

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  • Preparation method of high-formability aluminum alloy composite board material used for vehicle body external plate
  • Preparation method of high-formability aluminum alloy composite board material used for vehicle body external plate
  • Preparation method of high-formability aluminum alloy composite board material used for vehicle body external plate

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Embodiment 1

[0042] The implementation of aluminum alloy composite plate 1# adopts the following process: firstly, the Al-Mg-Si-Cu-Zn series alloy is smelted by medium frequency induction, the melting method is as follows, all pure aluminum is added to the crucible and the medium frequency induction melting is used, and the temperature is controlled at 780~ 880℃, then add Al-20wt%Si, Al-50wt%Cu, Al-20wt%Fe, Al-10wt%Mn, Al-5wt%Cr, Al-19wt%Ti and other intermediate alloys successively, and use high-power melting After keeping the temperature for 5 minutes, add pure Zn and pure Mg to the melt, and use high power to fully stir to dissolve it thoroughly, and keep it for 5 minutes; continue to wait until the melt is cooled to 740°C, and then remove the slag and add the refining agent for degassing and refining; Then, when the melt temperature is lowered to about 720°C, Al-5wt%Ti-1wt%B grain refiner is added and properly stirred. Finally, the melt is cast into a surrounding water-cooled steel mold ...

Embodiment 2

[0044] The implementation of aluminum alloy composite plate 2# adopts the following process: firstly, the Al-Mg-Si-Cu-Zn series alloy is smelted by medium frequency induction, the melting method is as follows, all pure aluminum is added to the crucible and the medium frequency induction melting is used, and the temperature is controlled at 780~ 880℃, then add Al-20wt%Si, Al-50wt%Cu, Al-20wt%Fe, Al-10wt%Mn, Al-5wt%Cr, Al-19wt%Ti and other intermediate alloys successively, and use high-power melting After keeping the temperature for 5 minutes, add pure Zn and pure Mg to the melt, and use high power to fully stir to dissolve it thoroughly, and keep it for 5 minutes; continue to wait until the melt is cooled to 740°C, and then remove the slag and add the refining agent for degassing and refining; Then, when the melt temperature is lowered to about 720°C, Al-5wt%Ti-1wt%B grain refiner is added and properly stirred. Finally, the melt is cast into a surrounding water-cooled steel mold ...

Embodiment 3

[0046] The implementation of aluminum alloy composite plate 3# adopts the following process: first, the Al-Mg-Si-Cu-Zn series alloy is melted by medium frequency induction, the melting method is as follows, all pure aluminum is added to the crucible and the medium frequency induction melting is used, and the temperature is controlled at 780~ 880℃, then add Al-20wt%Si, Al-50wt%Cu, Al-20wt%Fe, Al-10wt%Mn, Al-5wt%Cr, Al-19wt%Ti and other intermediate alloys successively, and use high-power melting After keeping the temperature for 5 minutes, add pure Zn and pure Mg to the melt, and use high power to fully stir to dissolve it thoroughly, and keep it for 5 minutes; continue to wait until the melt is cooled to 740°C, and then remove the slag and add the refining agent for degassing and refining; Then, when the melt temperature is lowered to about 720°C, Al-5wt%Ti-1wt%B grain refiner is added and properly stirred. Finally, the melt is cast into a surrounding water-cooled steel mold aft...

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Abstract

A preparation method of a high-formability aluminum alloy composite board material used for a vehicle body external plate belongs to the technical field of aluminum alloy. According to the method, high-plastic and anti-corrosion Al-Mn alloy and Al-Mg-Si-Cu-Zn alloy are composited through solid-liquid fusion casting; then through following thermo-processing for regulation, cooperative deformation of the two metals is achieved, thus producing the composite board in certain thickness ratio; in addition, the composition board has excellent formability, and is especially enhanced in flanging performance to a significant degree. The preparation method completely solves the problems of influence on the flanging performance due to residual micro-cracks in a coarse iron-rich phase due to incompletecrushing of a part of the Al-Mg-Si-Cu-Zn alloy, so that the alloy board material has very excellent comprehensive performance. The high-formability aluminum alloy composite board material is very suitable for manufacturing the vehicle body external plate, especially manufacturing parts, which have high demands on stamping shaping performance, flanging performance and stoving varnish hardening increment, in complex shapes.

Description

Technical field [0001] The invention belongs to the technical field of aluminum alloys, and relates to a high-formability aluminum alloy composite sheet for automobile body outer panels and a preparation method thereof, and is particularly aimed at the high requirements of high formability and high paint hardening aluminum alloy sheet for automobile lightweight. Development, the development of the composite sheet can ensure that it can smoothly stamp typical complex auto parts without cracking or wrinkling after bending with a large amount of deformation. Background technique [0002] In recent years, my country's automobile manufacturing industry has developed rapidly, with production and sales increasing year by year. However, with the increase in the number of cars, problems such as exhaust emissions and energy consumption cannot be ignored. Automotive aluminum is considered to be one of the better ways to solve the above problems. Aluminum alloy has many advantages, such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C21/10C22F1/04C22F1/053B22D19/16B32B15/01B32B15/20C22C1/03
Inventor 郭明星朱杰张济山林童庄林忠袁波
Owner UNIV OF SCI & TECH BEIJING
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