COLD ROLLED STEEL - posco.co.kr

1 cold ROLLED STEEL cold ROLLED STEEL . 2 , 4 , . & HSS 040608121416171819202223 26282930 Contents . 2 , 4 , . & HSS 040608121416171819202223 26282930 Contents , 1973 1 4 1981 2.

2 ,2007 5 . , , , , , , API 16 ,18 5 (2013 ) . , , API , .. , , , , API 20,231 (2013 )04 POSCO Hot ROLLED SteelPOSCO Hot ROLLED Steel05 & PohangGwangyangchInAjAPAnkoreASeoulThe PoScoQuality customer Inside : Basic Inside : Synergy Inside : Supply chain 06 POSCO cold ROLLED SteelPOSCO cold ROLLED Steel07 ( ) RHPILF.

3 - .- : 1 100 3 , 2 300 3 - : 1 250 3 , 2 250 3 - re instahl 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.

4 , coke 1,20 0 c , 10~50mm .- : 5 , 4 1,000 c (Ash) coke(25~75mm : , ) .- : 5 , 4 , coke 1,10 0 c coke .- : 6 (coreX 1 ), 5 / Size( mm)rhPILF coke (200~250) (74 0 ~2, 2 0 0)250 330120 120160 160 08 POSCO cold ROLLED SteelPOSCO cold ROLLED Steel09 & ( ) (Reheating Furnace) Slab.

5 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) (cr own) .Run-Out Table (Coiling) rUn-oUT TABLe . TABLe roLL SPrAY . (Skin Pass Mill).

6 SLAB run-out Table Shear Skin Pass MillWelderUncoilerSkin Pass Mill LFPIrh10 POSCO cold ROLLED SteelPOSCO cold ROLLED Steel11 & ( ) . 40~90% , , .. , .. 1% ..PL/TCM(Pickling Line and Tandem cold Mill)CAL(Continuous Annealing Line)BAF(Batch Annealing Furnace)Pay off reelWelderTensionLevelerentry Looper Tension reelFull hard coilPickle TankSide TrimmerTandem cold MillPay off reelFull hard coilWelderelectriccleaningTankFurnaceTen sion reelSkinPassMillSideTrimmeroilercold ROLLED coilShear ( ) FUr Tc Tc GAS cooling Yard 1 2 Furnacecooling coverInner Base(#1~6)k1 B a s e ( # 7~2 0 )coil Storageh2( ) out let : : VenT gas.

7 H2 in letcoG coIL Tc12 POSCO cold ROLLED SteelPOSCO cold ROLLED Steel13 , , .. , , , , , , , .HSS (~60kg )high Strength STEEL , . (LnG, LPG TAnk ), Mn , . , ( , ) (Sox).

8 Cu, cr 5 . ( ) ( ) . , , , oil Filter . , .14 POSCO cold ROLLED SteelPOSCO cold ROLLED Steel15 , , . cSP1 CommercialQualityCSP1 cSP1 DCSP21/2 cSP2 Drawing QualitycSP3(n)Deep Drawing QualitycSP3e,cSP3X,cSP3 ZExtra Deep Drawing Quality CSP31/4 1/8.

9 , . C(%)~ ~ ~ (%)~ ~ ~ S Pcc-1 SPcc-2 SPcc-4 SPcc-8P(%)~ 0~ ~ 74 ~ 8 965~805 0~71S(%)~ ~ ~ 135~185115~1509 5 ~13 0 KSkS-SPcckS-SPcDkS-SPcekS-SPcF,kS-SPcG kS 5 kS 5 JISjS-SPccjS-SPcDjS-SPcejS-SPcF,jS-SPcG jI S 5 ASTMA1008 cSA1008 DSA1008 DDSA1008 eDDS ASTMENen-Dc01, en-Dc03en-Dc04en-Dc05en-Dc06,en-Dc07 en . , Frame POSCOG rade ) kS, jIS . CSP1~392 (N/mm2)CSP1D~343 (%) (N/mm2) (mm) ~ ~ ~ ~ ~ ~ ~ ~28~31~34~36~3 7~38~39~270~33~30~3 2~3 2~3 2~--33~33~35~35~35~--35~36~38~38~38~4 7~52~3 7~38~38~40~270~270~270~265~260~255~38~40 ~40~40~4 7~52~39~41~41~41~49~52~40~42~42~42~50~-4 1~43~43~43~--CSP2 CSP3 CSP3 NCSP3 ECSP3 XCSP3Z~345~294~294~294~294~250 ) 1.

10 , Appendix(31P) . 2. PoSco , , . 3.. ) 1. , -S , -e , -Z , ) cSP1D-e S: , e: , Z: 2. cSP3n,e,X,Z 6 .16 POSCO cold ROLLED SteelPOSCO cold ROLLED Steel17 HSS high Strength STEEL ..E R C Ti , P, M n . P, M n.