淮钢弹簧钢连铸小方坯质量的提高

37420024IRONANDSTEELVol.37,No.4April2002()(),,,,LFaQUALITYIMPROVEMENTOFCONTINUOUSCASTBILLETSOFSPRINGSTEELATHUAIGANGYANGWu(HuaiyinLihuaiIronandSteelCo.,Ltd.)XUEZhengliangLIZhengbangZHANGJiawen(CentralIronandSteelResearchInstitute)ABSTRACTHuaiyinSteelhasbeentakingaseriesoftechnologicalmeasureswhichincludemoldelectromagneticstirringintensificationofladlefurnacerefining,modificationofdeoxidationprocessandadjustmentthecastingspeed.Thus,thesuperheatofmoltensteelintundishhasbeenceaselesslyreduced,thequalityofcontinuouscastbilletshavebeenlargelyimproved.KEYWORDSspringsteel,LFrefining,superheatofmoltensteel,billetcontinuouscast2ing160t:80t70tLF55181995,,ÊË,60Si2Mn(A)60Si2CrA60Si2CrVA55SiMnVB,,,,1,,,,,,60Si2MnA,4555,,,150mm150mm1020mm2,1999,20003,a:,,(100081)©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(SiO2Al2O3),,LF,,,,,,,[1],,,,LF,,120150Lömin60100Lömin,,4,116%210%,110%210%,01020%01030%,,01010%01025%[2,3],,90%,Al2O3Al2O3,,01005%,60Si2Mn,,0101%90%,010010%010016%,45%,SiO2,Al2O3,,1,10,,012mömin(1),,2(60Si2MnA)2,,,2,,,,,,CO,012m3öt,80%5(1)2237©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(a);(b)1150mm150mmTable1Castspeedsduringcontinuouscastingspringsteelwithcrosssectionof150mm150mmöömmin-150116114401171153011811620119117260Si2MnATable2Totaloxygencontentsinspringsteelrods%ö10-6101528241520394520252824253057260Si2MnAFig12Sulfurprintingsoflongitudinalsectionfromspringsteelbillets(a)29;(b)15,35(2),,,,(3),01005%,,,,,1,,11,1994,(1):91412,,11,2001,22(6)13,,11,2001,22(3):24261324:©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.