A high baking hardenability aluminum alloy plate and its preparation method

An aluminum alloy sheet, bake hardening technology, applied in the field of aluminum alloy sheet manufacturing, can solve the problems of poor adhesion and corrosion resistance of automobile body panels, achieve excellent paint bake hardenability, prevent surface roughness, and increase strength Effect

Active Publication Date: 2020-07-17
YINGKOU ZHONGWANG ALUMINUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the present invention solves the problem that MgO is easily formed on the surface of the aluminum alloy plate used in the automobile body covering in the prior art, making the adhesion of the automobile body covering and the corrosion resistance after painting poor. , providing a high bake-hardenable aluminum alloy plate and a preparation method thereof

Method used

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  • A high baking hardenability aluminum alloy plate and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of an aluminum alloy sheet with high bake hardenability, comprising the following steps:

[0031] A. Calculate the amount of each aluminum alloy raw material and prepare the aluminum alloy raw material according to the ratio. The mass percentage ratio of each element of the aluminum alloy sheet raw material is as follows:

[0032] element Mg Si Ti B Fe Zn Cu Sn Mn Cr Al content 0.40 0.60 0.008 0.0005 0.30 0.06 0.30 0.03 0.01 0.1 margin

[0033] The prepared aluminum alloy raw materials are added to the melting furnace and evenly mixed and then smelted into liquid aluminum alloy, and the liquid aluminum alloy is smelted into aluminum alloy ingots. The aluminum alloy melting process is melting, stirring, slag removal, degassing and impurity removal, and filtering , the semi-continuous casting method of casting;

[0034] B. Carry out homogenization annealing to the aluminum alloy ingot fused and cast in...

Embodiment 2

[0042] The difference between embodiment 2 and embodiment 1 is that in step A, the mass percentage ratio of each element of the raw material of the aluminum alloy sheet is as follows:

[0043] element Mg Si Ti B Fe Zn Cu Sn Mn Cr Al content 0.70 0.80 0.10 0.01 0.04 1.0 0.50 0.20 0.1 0.1 margin

Embodiment 3

[0045] The difference between Example 3 and Example 2 is that in step B, the homogenization annealing temperature is 600° C., and the holding time is 4 h.

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Abstract

The invention belongs to the field of manufacturing of aluminum alloy plates, and relates to an aluminum alloy plate with high bake hardenability and a preparation method thereof. The aluminum alloy plate with the high bake hardenability is prepared from, by weight, 0.4-0.9% of Mg, 0.6-1.4% of Si, 0.008-0.12% of Ti, 0.0005-0.04% of B, no more than 0.3% of Fe, 0.06-1.5% of Zn, 0.3-0.8% of Cu, 0.03-0.25% of Sn, no more than 0.15% of impurities and the balance Al, wherein the content of each the impurity is no more than 0.05%. By adoption of the aluminum alloy plate with the high bake hardenability and the preparation method thereof, the problem that MgO is likely to be formed on the surface of an aluminum alloy plate adopted by an automobile body covering part in the prior art, and consequentially, the binding property and corrosion resistance after painting of the automobile body covering part are poor is solved.

Description

technical field [0001] The invention belongs to the field of aluminum alloy plate manufacturing, and relates to an aluminum alloy plate with high bake hardenability and a preparation method thereof. Background technique [0002] Faced with the pressure to save energy and reduce environmental pollution, major automakers are increasingly focusing on lightweighting of automotive materials. Aluminum alloys have become the first choice for lightweight automobiles due to their low density, high specific strength, and excellent corrosion resistance, formability and impact energy absorption. Therefore, the application of aluminum alloy sheets in automotive hoods, trunk lids, doors and other coverings is becoming more and more common. [0003] At present, automotive aluminum sheets mainly include 5000 series and 6000 series. 5000 series aluminum alloys are non-heat treatable reinforced aluminum alloys, and their cost is lower than that of 6000 series aluminum alloys. However, becau...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C21/08C22C21/10C22C21/18C22F1/043C22F1/047C22F1/053C22F1/057C22F1/05
CPCC22C21/02C22C21/08C22C21/10C22C21/14C22C21/16C22C21/18C22F1/043C22F1/047C22F1/05C22F1/053C22F1/057
Inventor 迟壮田洪超李健刘贵军吕洪伟王志会
Owner YINGKOU ZHONGWANG ALUMINUM CO LTD
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