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Method of manufacturing aluminum alloy sheet product with low residual stress level

A technology of aluminum alloy plate and residual stress, which is applied in the field of manufacturing deformed aluminum alloy thick specification plate products, can solve the problem that the strength of the stretching machine is not enough to achieve the degree of stretching, etc.

Inactive Publication Date: 2011-12-14
ALERIS ALUMINUM KOBLENZ GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the plate product has a large cross-section (e.g. very thick or very wide or both), the strength of the stretching machine, especially the clamping force of the jaws, may not be sufficient to achieve the desired degree of stretching

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] All AA6061-series aluminum alloy panels have the same dimensions and are cast using the same procedure. They were subjected to the following standard transformation sequence for thick gauge products: homogenization followed by reheating, hot rolling to 152mm gauge, solution heat treatment and then quenching. Next, the as-quenched plate was treated in various ways to study the effect of further processing on the residual stress levels in the plate. The cold rolling described in the present invention is carried out on the rolling mill of 160 inches.

[0040] The following conditions have been tested:

[0041] 1. Quenching state;

[0042] 2. Quenched state, followed by 2% cold drawing, which is part of the common Tx51 processing route for this type of alloy product;

[0043] 3. Quenched state, followed by cold reduction according to the present invention at a strain rate of about 0.016 / sec, with a 3% reduction in cold-rolled thickness in two passes;

[0044] 4. Quenche...

Embodiment 2

[0050] In other series of industrial scale tests, 360 mm plate was produced up to the quenched condition in a similar manner to Example 1; the quenched condition plate product was then cold rolled according to the invention using a strain rate of about 0.015 / sec, A variable cold rolling reduction is thus applied (both single rolling passes).

[0051] According to BMS 7-323, the residual stress level in the mid-thickness (s / 2) of the plate was measured, and the results are listed in Table 2.

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Abstract

The present invention relates to a method of manufacturing thick gauge aluminum alloy plates with low residual stress levels, said method comprising: (a) providing a solution heat treated and quenched aluminum alloy plate having a thickness of at least 80 mm; (b) by adding said Cold rolling of the plate stress relieves it, resulting in a reduction of up to 8% in the thickness direction of the plate product.

Description

technical field [0001] The present invention relates to a method of manufacturing wrought aluminum alloy heavy gauge plate products with low levels of residual stress. Background technique [0002] As described below, unless otherwise stated, all aluminum alloy designations hereinafter refer to the "Aluminum Association designations" in "Aluminum Standards and Data and the Registration Records" published by the Aluminum Association in 2008. [0003] Unless otherwise stated, for any description of alloy compositions or preferred alloy compositions, the percentages referred to are percentages by weight. [0004] Age-hardenable wrought aluminum alloys are particularly well suited for aerospace applications due to their combination of strength, corrosion resistance and damage resistance. Plates from these products are usually produced by a process comprising: casting; forming by rolling and / or forging; solution heat treating; quenching the solution heat treated product; The pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04
CPCC22F1/04C22C21/00
Inventor 英戈・京特・克罗普夫尔艾尔弗雷德・约翰・皮特・哈茨勒
Owner ALERIS ALUMINUM KOBLENZ GMBH
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