Aluminum Alloy Sheets For Automobile Panels

The production of car body, especially the production of all kinds of manned vehicle body, is the quintessence of the automobile industry. The body building almost takes up 30% of the total investment of the automobile manufacturing company. The quality of the body is 30% of the total mass, and the reduction of its quality plays a vital role in reducing the quality of the vehicle.

Aluminum Alloy Sheets For Automobile Panels

Aluminum Alloy Sheets For Automobile Panels

Aluminum sheet for manned vehicle

Aluminum sheet for manned vehicle

The thickness of the sheet metal parts for the car body of a manned vehicle is 0.9--1.3mm, and about 19 panels per car. Body parts of large size and complex shape, mainly through punching and bulging two composite molding production, and the latter mainly. The joint of the sheet metal parts is welded or bonded, and it is also linked to the fastener.

The brand and chemical composition of the ABS plate aluminum alloy of the car body are shown in the following table. With 2 series, 5 series and 6 series in the body can, 7 series alloys, in addition to 5 series alloy, three other alloys are heat treatment can enhance the strength in their painting baking (170--200 C, 20--30min) has been further improved, for the manufacture of high light and high rigid plate, the strength of 6*** alloy although low, but the plastic forming performance, used in the manufacture of complex shaped plate. 6009 and 6010, the strength of the body plate alloy after T4 treatment is lower than that of 5182-O and 2036-T4 alloy, but the plasticity is quite high. After molding, the artificial aging can achieve higher strength in the process of spraying and baking. These two alloys can be used to make both inner and outer panels separately, or 6009 alloy to make inner wall panels, and two with 6010 alloy to make outer wall panels.

Chemical Compostion of Aluminum alloy sheets for automobile panels

Alloy

Si

Fe

Cu

Mn

Mg

Cr

Zn

Ti

Others

Aluminum Min.

Each

Total

5182

0.20

0.35

0.15

0.20-0.50

4.0--5.0

0.10

0.25

0.10

0.05

0.15

Remainder

5754

0.40

0.40

0.10

0.50

2.6--3.6

0.30

0.20

0.15

0.05

0.15

Remainder

6016

1.0--1.5

0.50

0.20

0.20

0.25--0.6

0.10

0.20

0.15

0.05

0.15

Remainder

6014

0.30-0.60

0.35

0.25

0.05--0.20

0.40--0.8

0.20

0.10

0.10

0.05

0.15

Remainder

Physical Property( thickness 0.9mm--1.3mm) of Aluminum alloy sheets for automobile panels

Alloy Temper

90º Bending radius

cupping value/mm

N Value

R Value

Tension Strength Rm/N.mm¯²

Yield Strength Rp0.2/N.mm¯²

Elongation A₅/%

5182 - O

1/2t

0.33

0.80

28.1

13.3

26

5754 - O

1/2t

0.31

0.67

215

108

53

6016 - T4

1/2t

10

0.26

0.75

24.0

13.0

26

6014 - T4

1/2t

0.26

0.65

17.9

13.0

23

6111 - T4

1/2t

8.4

29.6

16.2

26

The aluminum alloy sheets for automobile panels also needs to have the performance:

1.Good formability

Forming the body and cover of the metal plate is moved over from the aviation industry, the Aluminum Alloy  automotive body sheet forming should have good formability, which has low yield ratio and high forming limit (FLC forming, limit curve), with very high space forming stress deformation in stamping different.

2.Surface roughness

Aluminum Alloy must have good ductility and flanging forming after surface color consistent performance of the sheet metal forming surface does not appear in Luoping line (roping line), namely the slip line. It is due to uneven grain or uneven distribution of inclusions, resulting in uneven surface deformation of the sheet, so that the surface is inconsistent after the paint.

3.Good weldability

Good welding performance meets the requirements of continuous welding process for automobile construction after forming. The plate should have anti ageing stability, to ensure that the board before the factory to the stamping production without limitation, prevent the stamping of the yield point of the material increased, induced by Lu De with (Lude 's zone) surface caused by uneven deformation and wrinkling, thus affecting the surface quality of automobile outer panels.

4.Excellent baking hardening

Lightweight automobile also requires plate with high bake hardening, the yield strength of plate after stamping deformation and paint baking increased, so as to ensure the stamping sheet metal paint after high dent resistance, compatibility Aluminum Alloy plate paint baking process and the steel stampings especially baking process the.

Specification of Aluminum alloy sheets for automobile panels

Alloy: 5182, 5754, 6016, 6014, 6111

Temper: T4, O

Surface treatment: EDT, Prelubrication, Primer coated

Strip/sheet width: 1000-2300mm

Strip/sheet gauge: 0.6--3.2mm

Capacity: 100 000 tonne/ year

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