automotive steel - posco.co.kr · pdf file2 posco automotive steel 자동차 강판 automotive...

AUTOMOTIVEsTEEl

2
POSCO Automotive Steel
AUTOMOTIVE STEEl
, , Top .
,
Top .
04
06
16
20
70
72
82
84
90
94
Contents
,
, , Top .
,
Top .
04
06
16
20
70
72
82
84
90
94
Contents
,

04 05
, 1973 1
4 1981 2 .
,
2007 5
.
, , , , , , API
16,185(2013 )
.
,
, API , .
.
, , , , API
20,231(2013 )
Pohang
GwangyangchInA
jAPAn
koreA
Seoul
The POSCOQuality customer Inside :
Basic Inside :
Synergy Inside : Supply chain

06 07
()
RH
PI
LF
.
- .- : 1 100 3, 2 300 3- : 1 250 3, 2 250 3
- reinstahl hutenwerke & heraus - Ar n2 , .- oxygen Blowing
- Powder Injection- Lance ca-Si , .
- Ladle Furnace- Arc .
- (rh, PI, LF) (MoLD) , , Slab, Bloom, Billet .
/
Coke
(10~25mm), (25mm) (10mm) Size .
, coke 1,200c , 10~50mm .- : 5, 4
1,000c (Ash) coke(25~75mm : , ) .- : 5, 4
, coke 1,100c coke .- : 6(coreX 1 ), 5
/
Size(mm)
rh
PI
LFcoke
(200~250)
(740~2,200)
250330
120120160160

08 09
& ()
(Reheating Furnace)
Slab
. Slab Scale
Scale Breaker , .
(Roughing Mill)
Scale Slab ,
. edger AWc(Automatic Width
control) .
(Finishing Mill)
, . Work
roLL ShIFT , PAIr croSS MILL, orG(on-Line roll Grinding)
(crown) .
Run-Out Table (Coiling)
rUn-oUT TABLe .
TABLe roLL SPrAY
.
(Skin Pass Mill)
,
,
.
.
SLAB
run-out Table
Shear
Skin Pass Mill
Welder
Uncoiler
Skin Pass Mill
LF PI rh

10 11
& ()
40~90% ,
,
.
.
,
.
.
1%
.
.
PL/TCM(Pickling Line and Tandem Cold Mill)
CAL(Continuous Annealing Line)
BAF(Batch Annealing Furnace)
()
FUr Tc
Tc
GAS
cooling Yard
1
2
Furnace
cooling cover Inner cover
Tilterno.2
Tilterk1c
convectorMagnet
h2 Base(#1~6) k1 Base(#7~20) coil Storage
h2() out let
: : VenT gas : h2 in let
coG
coIL Tc
Pay off reel
Welder
TensionLeveler
entry Looper
Tension reel
Full hard coil
Pickle Tank
Side Trimmer
Tandem cold Mill
Pay off reel
Full hard coil
Welder
electriccleaningTank Furnace
Tension reelSkinPassMill
SideTrimmer
oiler
cold rolled coil
Shear

12 13
,
,
.
.
Pot Zn , Air knife
.
Air knife
Fe Zn
Zn-Fe .
Flat Skin
Pass Mill
,
cr-free .
&
Side Trimmer, , oiler,
.
PL/TCM
CAL
(HGI) (GI, GA)
&
Water cooling
cooling chamber
Furnace Section
Furnace
GAFurnace
Zinc Pot
SPM
PL Tank
Welder
Pickle Tank
Delivery Looper
Delivery Looper
Post Treatment
entry Looper
entry Looper
Precleaning
electrolyticcleaning
Tendem Mill
SideTrimmer
Scale Breaker
Payoff reel
Payoff reel
Tensionreel
hGI
Tension reel
oiler
oiler
SPM

14 15
Pay off reel, , ,
Looper, Tension Leveller
.
Strip
,
, ,
rinse .
Type
.
, ,
.
,
,
.
Looper Tension reel
,
.
CAL
EGL
(EGI)
&
PL/TCM
Welder
Welder
Welder
Pickle Tank
Delivery Looper
entry Looper
Tendem Mill
SideTrimmer Side
TrimmerPayoff reel
Payoff reel
Furnace
organic coatingcoater Dryer
oiler
electrolyticcleaningTank
SkinPassMill
PostTreatment
LooperTension
reel
coatingWeight Gauge
Watercooling
Inspectionoiler
Pre-Treatment
Plating cell
Looper
TensionLeveller

16
17
Hood OTR (35HSS)Hood INR (DDQ) Chipping, , , ,
Trunk Lid OTR (35HSS)Trunk Lid INR (DDQ~EDDQ) ,
Side OTR (EDDQ) ,
Rear floor (DDQ~EDDQ) , ,
Floor Cross MBR(35~45HSS) ,
Bumper reinforcement(80~120 AHSS) , Press , Roll Forming,
Front Side MBR(40~45 HSS) ,
Frame (40~45 HSS) , ,
Door OTR (35HSS)Door INR (DDQ) , , ,
Door impact beam (80~100 HSS) , , ERW
Shock absorber housing (S-EDDQ)
/
Roof (CQ-DQ)
, , ,
,
-
, , , , Dent,
, , ,
,
, , , Dent
Door Inner, Floor
Bumper
Door oTr
oil Pan,
Part , .

18
19
1.
(Mild Steel) 340MPa .
. ,
rear floor Side body outer .
1.1 IF
IF Ti, nb
(Interstitial atom) c, n
. Scavenging effect
.
1.2 (C,N,S)
.
(rankford, F) ,
.
2.
2.1
BAF (Batch Annealing Furnace), CAL (Continuous Annealing Line)
Elongation (%)
:Cold-rolled :Hot-rolled 1) CR (uncoated cold-rolled), EG (electrogalvanized), GI (hot-dip galvanized), GA (hot-dip galvannealed), PO (pickling and oiling)
Grade Guaranteedvalue Class.1) C
Max.Mn
Max.Si
Max.P
Max.S
Max.
CQ TScr/eG 0.1 0.50 0.04 0.035 0.025
GI/GA 0.1 0.50 0.04 0.035 0.025
LQ TScr/eG 0.08 0.45 0.04 0.035 0.025
GI/GA 0.08 0.45 0.04 0.035 0.025
DQ TScr/eG 0.08 0.45 0.04 0.030 0.025
GI/GA 0.08 0.45 0.04 0.030 0.025
DDQ TScr/eG 0.08 0.40 0.04 0.025 0.020
GI/GA 0.08 0.40 0.04 0.025 0.020
EDDQ TScr/eG 0.008 0.30 0.04 0.020 0.020
GI/GA 0.008 0.30 0.04 0.020 0.020
S-EDDQ TScr/eG 0.006 0.30 0.12 0.020 0.020
GI/GA 0.006 0.30 0.12 0.020 0.020
H-EDDQ TScr/eG 0.006 0.25 0.12 0.020 0.020
GI/GA 0.006 0.25 0.12 0.020 0.020
C TS Po 0.15 0.60 0.06 0.010 0.025
D TS Po 0.10 0.45 0.06 0.03 0.025
E TS Po 0.08 0.40 0.04 0.25 0.020
2.2 1)
2.3
:Cold-rolled :Hot-rolled 1) Guaranteed value for tensile test, uncoated sheet, rolling direction, JIS5 specimens (CR: 0.8t

20
21
3. ( : mm)Grade : CR/GA, DDQ
( : mm)Grade : PO, C/D/E
The above diagrams are only for selected steel grades. Please contact for more information of other grades.
Grade . Grade .
Hood inner Door inner Rear floor
CR GA
4.
Cold rolled and galvanized steel sheets for inner and outer panels
Hot rolled steel sheets for members and chassis0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6
600
700
800
900
1,000
1,100
1,200
1,300
1,400
1,500
1,600
1,700
1,800
1,900
1.0 1.2 1.4 1.6 1.8 2.0 2.3 2.7 3.2 4.0 5.0 6.0 7.0
600
700
800
900
1,000
1,100
1,200
1,300
1,400
1,500
1,600
1,700
1,800
1,900
(Mild Steel)

22
23
(Bake Hardening Steel)
1.
(Bake hardening Steel) , ,
. , (Bake hardening
effect) 30MPa . (Dent resistance) ,
. hood, Door outer
.
1.1 BH
30MPa , cottrell
.
1.2 BH
2.
2.1
:Cold-rolled :Hot-rolled 1) CR (uncoated cold-rolled), EG (electrogalvanized), GI (hot-dip galvanized), GA (hot-dip galvannealed), PO (pickling and oiling)
Grade Guaranteedvalue Class.1) C
Max.Mn
Max.Si
Max.P
Max.S
Max.
340BH TScr/eG 0.0020 0.65 0.03 0.06 0.015
GI/GA 0.0020 0.65 0.03 0.06 0.015
180YB YScr/eG 0.0024 0.20 0.05 0.03 0.013
GI/GA 0.0024 0.20 0.05 0.03 0.013
210YB YScr/eG 0.0030 0.20 0.09 0.07 0.015
GI/GA 0.0030 0.20 0.09 0.07 0.015
240YB YScr/eG 0.0030 0.20 0.09 0.07 0.015
GI/GA 0.0030 0.20 0.09 0.07 0.015
270YB YS GI/GA 0.0030 0.20 0.09 0.07 0.015
(r-value) 1.4
(6 ) YP-eI 0.2%
30MPa
2.2 1)
:Cold-rolled :Hot-rolled 1) Guaranteed value for tensile test, uncoated sheet, rolling direction, JIS5 specimens (CR: 0.8t

24
PO

automotive steel - posco.co.kr · pdf file2 posco automotive steel 자동차 강판 automotive...

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