Heat treatment process for aluminum alloy sheet

A technology of aluminum alloy plate and alloy plate, which is applied in the field of heat treatment of aluminum alloy plate, and can solve the problems that the degree of improvement cannot be achieved.

Inactive Publication Date: 2001-07-11
NOVELIS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, these references do not achieve the desired degree of improvement

Method used

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  • Heat treatment process for aluminum alloy sheet
  • Heat treatment process for aluminum alloy sheet
  • Heat treatment process for aluminum alloy sheet

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0045] Various alloys shown in Table 1 below were used in this example. These alloys are in the form of plates with a thickness of 0.1 cm (0.039 inches).

[0046] Table 1

[0047] Alloy

CU

FE

MG

MN

Si

Ti

X 611 *

＜0.01

0.15

0.77

＜0.01

0.93

0.06

AA 6111

0.78

0.11

0.81

0.16

0.60

0.08

AA 6009

0.33

0.23

0.49

0.31

0.80

AA 6016

0.10

0.29

0.40

0.08

1.22

0.01

AA 2036

2.2

0.15

0.18

0.10

0.18

KSE*

1.10

0.15

1.22

0.08

0.26

LSG*

1.52

0.15

1.22

0.08

0.33

[0048] * experimental alloy

[0049] These alloys were initially solution heat treated and naturally aged tempered, and tensile...

example 2

[0079] Table 6 below shows the average tensile properties of AA6111 and AA6016 sheets after different thermal peak effects and different pre-aging treatments.

[0080] heat change history

AA 6111

AA 6016

T4

T8X

T4

T8X

YS

kg / cm 2

(KSI)

%

EL

YS

kg / cm 2

(KSI)

%EL

YS

kg / cm 2

(KSI)

%

EL

YS

kg / cm 2

(KSI)

%

EL

Solution heat treatment + quenching

Fire + at room temperature (RT)

next week (control)

1427.1

(20.3)

27

2102

(29.9)

23

1195.1

(17.0)

32

1834.8

(26.1)

24

Solution heat treatment + quenching

fire * + stabilizer

Reason (105°C) + No.

secondary stabilization

(130℃)+3rd

secondary stabilization

(240°C)+:

a) Next star on RT

Expect

b) at 85°C for 5

hours without warra...

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Abstract

A process of producing solution heat treated aluminum alloy sheet material comprises subjecting hot- or cold-rolled aluminum alloy sheet to solution heat treatment followed by quenching and, before substantial age hardening has taken place, subjecting the alloy sheet material to one or more subsequent heat treatments involving heating the material to a peak temperature in the range of 100-300 DEG C(preferably 130-270 DEG C), holding the material at the peak temperature for a period of time less than about 1 minute, and cooling the alloy from the peak temperature to a temperature of 85 DEG C or less. The sheet material treated in this way can be used for automotive panels and has well a good 'paint bake response', i.e. an increase in yield strength from the T4 temper to the T8X temper upon painting and baking of the panels.

Description

technical field [0001] The present invention relates to a method of heat treatment of an aluminum alloy plate which improves the paint drying response of the plate. Background technique [0002] Aluminum alloy sheet is now more widely used as structural and casing panels for vehicle bodies as automakers are striving to improve fuel economy by reducing vehicle weight. Aluminum alloys have traditionally been either directly chill cast into ingots or continuously cast into thick strips, followed by hot rolling to a predetermined thickness. In a separate operation the strip is cold rolled to final gauge and wound into coils. The coil must then be solution heat treated to strengthen the formed sheet during the coating process. [0003] Solution heat treatment includes heating the alloy to an appropriately high temperature (for example, 480-580 ° C), so that all soluble alloy components precipitated from the parent alloy during hot rolling and cold rolling dissolve into a solid ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/00C22C21/02C22C21/06C22C21/08C22C21/14C22C21/16C22F1/04C22F1/043C22F1/05C22F1/057
CPCC22F1/05C22F1/04C22C21/14C22C21/02C22F1/043C22C21/08C22F1/057C22C21/16
Inventor A·K·古普塔M·J·维勒M·J·布尔P·H·马洛伊斯
Owner NOVELIS INC
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