dr. trond furu, hydro - aluminium metal and aluminium ... · primary casting fabrication...
TRANSCRIPT
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(1) 2011-01-10
Processing of Aluminium into Products
Dr. Trond Furu, Hydro
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Content
- Hydro Value Chain- Extrusion and rolling process chains- Metallurgical parameters affecting
processability and product properties- Examples of aluminium products
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Aluminium is all around us
• Light metal
• Strong
• Long-life
• High corrosion resistance
• Good conductor for heat and electricity
• Good reflector (light & heat)
• Good ductility
• Completely impermeable and odour free
• 100% recyclability
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Primary Casting Fabrication
Furnace-operationFiltration
Castingtechn.
EI, SI, FAingots
Homo-genization.
TP*
AnnealingPotlinetechn.Liquidmetal
Recycling
Sorting and upgrading
Anodequality
Oxidequality
Techno-logy
Crude oilquality
Bauxitequality
SheetProfiles
Formingoperations
Surfacetreatment
Customerprocesses
RawmaterialsCoke
RawmaterialsAlumina
Fuelquality
* TP = Thermo mechanical processing (extrusion, rolling)
Refinery techno-
logy
Value chain of extruded, rolled and foundry alloy products
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Casting
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The casthouse
Casting centre
Launder
Rod feeder
SIR unit
Furnace
Tapping vehicle
RAM station
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Main alloying elements in extruded and rolled aluminium alloysG r o u p * *
P e r i o d 1
I A 1 A
1 8
V I I I A8 A
1 1
H 1 . 0 0 8
2 I I A 2 A
1 3
I I I A3 A
1 4I V A4 A
1 5V A5 A
1 6V I A6 A
1 7V I I A
7 A
2 H e4 . 0 0 3
2 3
L i 6 . 9 4 1
4 B e 9 . 0 1 2
5
B1 0 . 8 1
6
C1 2 . 0 1
7
N1 4 . 0 1
8
O1 6 . 0 0
9 F
1 9 . 0 0
1 0
N e2 0 . 1 8
8 9 1 0 3
1 1 N a 2 2 . 9 9
1 2 M g 2 4 . 3 1
3 I I I B3 B
4I V B4 B
5V B5 B
6 V I B6 B
7 V I I B
7 B- - - - - - - V I I I - - - -
- - - - - - - - - - 8 - - - - - - -
1 1 I B 1 B
1 2I I B2 B
1 3
A l2 6 . 9 8
1 4
S i2 8 . 0 9
1 5
P3 0 . 9 7
1 6
S3 2 . 0 7
1 7
C l3 5 . 4 5
1 8
A r3 9 . 9 5
4 1 9 K
3 9 . 1 0
2 0 C a 4 0 . 0 8
2 1
S c4 4 . 9 6
2 2
T i4 7 . 8 8
2 3
V5 0 . 9 4
2 4
C r5 2 . 0 0
2 5
M n5 4 . 9 4
2 6
F e5 5 . 8 5
2 7
C o5 8 . 4 7
2 8 N i
5 8 . 6 9
2 9 C u6 3 . 5 5
3 0
Z n6 5 . 3 9
3 1
G a6 9 . 7 2
3 2
G e7 2 . 5 9
3 3
A s7 4 . 9 2
3 4
S e7 8 . 9 6
3 5
B r7 9 . 9 0
3 6
K r8 3 . 8 0
5 3 7
R b 8 5 . 4 7
3 8 S r
8 7 . 6 2
3 9
Y8 8 . 9 1
4 0
Z r9 1 . 2 2
4 1
N b9 2 . 9 1
4 2
M o9 5 . 9 4
4 3
T c( 9 8 )
4 4
R u1 0 1 . 1
4 5
R h1 0 2 . 9
4 6 P d
1 0 6 . 4
4 7 A g1 0 7 . 9
4 8
C d1 1 2 . 4
4 9
I n1 1 4 . 8
5 0
S n1 1 8 . 7
5 1
S b1 2 1 . 8
5 2
T e1 2 7 . 6
5 3
I 1 2 6 . 9
5 4
X e1 3 1 . 3
6 5 5
C s 1 3 2 . 9
5 6 B a 1 3 7 . 3
5 7
L a *1 3 8 . 9
7 2
H f1 7 8 . 5
7 3
T a1 8 0 . 9
7 4
W1 8 3 . 9
7 5
R e1 8 6 . 2
7 6
O s1 9 0 . 2
7 7
I r1 9 0 . 2
7 8 P t
1 9 5 . 1
7 9 A u1 9 7 . 0
8 0
H g2 0 0 . 5
8 1
T l2 0 4 . 4
8 2
P b2 0 7 . 2
8 3
B i2 0 9 . 0
8 4
P o( 2 1 0 )
8 5
A t( 2 1 0 )
8 6
R n( 2 2 2 )
7 8 7
F r ( 2 2 3 )
8 8 R a ( 2 2 6 )
8 9
A c ~( 2 2 7 )
1 0 4
R f( 2 5 7 )
1 0 5
D b( 2 6 0 )
1 0 6
S g( 2 6 3 )
1 0 7
B h( 2 6 2 )
1 0 8
H s( 2 6 5 )
1 0 9
M t( 2 6 6 )
1 1 0 - - -
( )
1 1 1 - - -
( )
1 1 2
- - -( )
1 1 4
- - -( )
1 1 6
- - -( )
1 1 8
- - -( )
L a n t h a n i d e S e r i e s *
5 8
C e1 4 0 . 1
5 9
P r1 4 0 . 9
6 0
N d1 4 4 . 2
6 1
P m( 1 4 7 )
6 2
S m1 5 0 . 4
6 3
E u1 5 2 . 0
6 4
G d1 5 7 . 3
6 5 T b 1 5 8 . 9
6 6 D y1 6 2 . 5
6 7
H o1 6 4 . 9
6 8
E r1 6 7 . 3
6 9
T m1 6 8 . 9
7 0
Y b1 7 3 . 0
7 1
L u1 7 5 . 0
A c t i n i d e S e r i e s ~ 9 0
T h2 3 2 . 0
9 1
P a( 2 3 1 )
9 2
U( 2 3 8 )
9 3
N p( 2 3 7 )
9 4
P u( 2 4 2 )
9 5
A m( 2 4 3 )
9 6
C m( 2 4 7 )
9 7 B k ( 2 4 7 )
9 8 C f
( 2 4 9 )
9 9
E s( 2 5 4 )
1 0 0
F m( 2 5 3 )
1 0 1
M d( 2 5 6 )
1 0 2
N o( 2 5 4 )
1 0 3
L r( 2 5 7 )
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The casthouse
Casting centre
Launder
Rod feeder
SIR unit
Furnace
Tapping vehicle
RAM station
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Sheet ingot
Extrusion ingot
Foundry alloys
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FinishingSawing and packing
Bundels ShippingSawing of extrusion ingotExtrusion ingot after casting
Sawing of sheet ingot
Sheet ingots ready for shipping
Packing … … and marking
Casting strands cut to ingots
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Extrusion
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Melt treatment Casting Homogenizing Billet preheating
Extrusion CoolingStretching
Cutting
Storing
Ageing
User
Recycling
FORMING
Process-route for extrusion
Extrusion
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Microstructure characteristics that affect processability and control material properties in aluminium alloys
Mg5Si6
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Temperature-time profile along the extrusion process chain
DC - CASTING HOMOGENIZING EXTRUSION FORMING AGEING
Tem
pera
ture
Homogenization Preheating Extrusion Cooling AgeingTime
~ 580 °C
440-490 °C
185 °C
~ 700 °C
Casting
2 - 3 hours
~ 200 °C/h
5-45minutes(induction)or gas
0.5 - 1min intotal(~5 sec.)in defor-mationzone)
Forcedair orwater 5 hours
~ 600 °C
200 - 500 °C/h
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Grain structure evolution during the extrusion process
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Al-Mg-Zn-ZrAl-Mg-Zn
1mm 1mm
Al-Mg-Si Al-Mg-Si-Mn
500 um 500 um
Typical microstructures in extruded profiles
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Grain structure influence crack nucleation and growth (formability)
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Effect of grain structure on fatigue
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Corrosion attack preferentially along grain boundaries
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Rolling
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rollingingots
size up to0,6x2 / 2x8,5m
break-downhot mill
multi-standrolling
line
six-highcold mill
coil-annealfurnace
The process chain and industrial equipment of Aluminium sheet production
break-down tandemcasting - homogenization - hot rolling - cold rolling - annealing
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grai
nste
xtur
es
Evolution of the typical microstructures in theindustrial Aluminium sheet production chain
part
icle
s
AlMg1Mn1
break-down tandemcasting - homogenization - hot rolling - cold rolling - annealing
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Forming operations
End-user processes
Surface processes(anodising/laquering/..)Welding/joining
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CastingExamples of products from Foundry Industry
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meter millimeter micrometer nanometer
1 nm1 nm
Al
From Macro to Micro to Nano
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Scanning Electron Microscope (SEM), Hydro
Transmission Electron Microscope (TEM), NTNU
Instruments in use to analyse structures on micro and nano-levels
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Sensitivity analysis by through process modellingWhat is the effect of changing casting parameters on the final strength in the alloy?
DC - CASTING
HOMOGENIZING
EXTRUSION
Finite element model developed for simulating DC casting of sheet ingots and extrusion billets by calculating the time-evolution of the heat-transfer and the fluid flow in the liquid and solid
ALSIM
Predicts the solidification process and subsequently the homogenization process in commercial, multi-component aluminium alloys, with compensation for solid-state diffusion and particle growth undercoolings.
Alstruc
Predicts the precipitation and dissolution of Mg2Si particles (includes spheres, rods and plates)
Mg2Si
DAS(Cooling rate)
Primary phasesSolid solution
Predicts the precipitation of the strengthening β’’-Mg5Si6particles, and the resultant yield stress.
NaMoAGEING
DispersoidsSolid solution
Solid solution
Mg5Si6 particlesYield stress
NaMo
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Thank you for your attention