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IF,,,(,114009):IFJFEIFIF,IF:;IF;;:TF761:A:1006-4613(2009)01-0006-04AnalysisofSteelmakingTechnologyforExtra-LowCarbonIFSteelatHomeandAbroadPanXiulan,WangYanhong,LiangHuizhi,FengShichao(TechnologyCenterofAngangSteelCo.,Ltd.,Anshan114009,Liaoning,China)Abstract:Thechemicalcompositionsofextra-lowcarbonIFsteelofsomeadvancedsteelfac2toriesathomeandabroadareintroduced,theproductionandapplicationconditionsofIFsteelatNip2ponSteelandJFEinJapan,ThyssenkruppSteelinGermany,InlandSteelinAmerica,BaoSteelandAngangSteelinChinaarealsointroduced.ThekeytechnologiesforIFsteelintheprocessesofhotmetalpretreatment,convertersteelmaking,vacuumrefiningandcontinuouscastingareanalyzed.Itispointedoutthatthechemicalcompositions,inclusionscontentandeachprocessmustbecontrolledstrictlyduringextra-lowcarbonIFsteelsmelting.Keywords:extra-lowcarbonsteel;IFsteel;steelmakingprocess;chemicalcompositionIF(InterstitialFreeSteel)IF,JFEIF200t20,IF1000t,,,IF,IF,,1982,,IF1IFIF,,,,,,IFIFIF(0.003%)(0.003%),IF1[1]1,IF0.0010%620091ANGANGTECHNOLOGY3551IF%CSiMnSPAlNTiNb0.0020.0050.0070.0250.250.500.0080.0200.0010.0100.0030.0120.0040.0050.0800.3100.0600.2500.0010.0060.0090.0200.100.200.0020.0130.0030.0150.0200.0500.0010.0060.0040.0600.0040.0390.0020.0060.0100.0200.100.200.0020.0130.0050.0150.0200.0700.0010.0040.0100.0600.0050.0150.0020.0050.0100.0200.100.200.0020.0130.0050.0150.0200.0700.0010.0040.0100.0600.0050.0150.0020.0050.0100.0300.100.200.0070.0100.0030.0150.0200.0700.0010.0040.0200.0400.0040.0102IFIFIF[2]:42.1IF,,,,,0.001%2.2,IF,0.003%,,;,,,;;;;,;,;,()2.3RHIF,,IF;;,,,;2.4IF,,,,,,;,;,;,3mm33.1IF,,3401270MPa,KR(S0.002%),LD-ORPIF,,2.53.0,13201350,910min,20min,9%,(P0.020%),92%,,2830min,IF22,IF,3.2JFEJFEIF100%,,,,0.03%0.04%,,,CaCO3,30%50%;TFe2%4%720091ANGANGTECHNOLOGY3552IFRHRHAl2O3Al2O3SiO2HMg-C,Zr1/43.3IF:RH0.03%,RH0.02%;;RH3.4IF,RH-OB,8min,0.008%,4min,0.002%RH-OB,,3.5IF[3]:RH(,),,0.5%0.025%0.003%,,,IF0.0019%,0.010%,,,3.6IF[4]:RH-TB,180tIF,,,--,,0.04%0.06%,0.05%RH-TB0.04%,0.05%,3:0.04%0.02%;0.02%0.003%;0.003%0.001%0.05%,0.02%8:IF20091355,IF,,,RH,IF0.05%4IF,,:;;,IF,,,IF,,IF[1]ZhaoPei,TechnicalHandbookofSecondaryRefiningandHotMetalPretreatment[M].BeiJing,2004,340354.[2],.IF[J]..2005,27(4):436440.[3].IFRH[C]//.RH.,2007:103106.[4],.RH[C]//.RH.,2007:3740.():2008-04-306,,,,,K,2080,,(),K2K2,,(C),,1m,1998GX-K2GX-KXGX-J2,,,GX-GP,920091ANGANGTECHNOLOGY355