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32Vol13No12:2004205208.:(1957-),,,.:(1976-),,,.E2mail:zhandp23@163.com20046JournalofMaterialsandMetallurgyJune20041,1,2,2,2(11617067;21110004):,,..:;;;;:TF762:A:167126620(2004)0220083207Developmentofsmeltingtechnologyforheavy2railsteelinChinaZHOUYi2ping1,YANXue2mo1,ZHANDong2ping2,ZHANGHui2shu2,DAIYun2ge2(11PanzhihuaIronandSteelGroupCo.,Panzhihua617067,China;21SchoolofMaterialsandMetallurgy,NortheasternUniversity,Shenyang110004,China)Abstract:Withthedevelopmentofhigh2speedrailwaytechnology,higherrequirementsofquality,property,andcleannessofrailsteelareputforwardbyusers.Thecompositioncontrolandcleannesslevelofrailsteelaredeterminedbythesmeltingtechnology.Theproductionstatusofrailsteelandsmeltingtechnologyofheavy2railsteelinChinaaresummarized.Keywords:railsteel;heavy2railsteel;smelting;secondaryrefining;continuouscasting,...,,,,.,,.1[1].,.,,.1Table1Internalqualityrequirementofrailsteelinhigh2speedrailsteelstandardT[O]10-6PSAls%H10-6CSiMn%ABCD200km/h20200103010301030103010041151150102010201050105215210115110115110115110EN20010201008010250100411501020105K31095%10K3205%1,[2].(1):MnSi2Mn.:CrCr2VCr2MoCr2Mo2VCr2Si2Nb.(2);,.(3)();;;.(4)70kg,b685MPa;80kg,b785MPa;90kg,b880MPa;110kg,b1080MPa;130kg,b1275MPa.(5)50kg/m;60kg/m;70kg/m;80kg/m.(6);;.2119992001,1471615718t.2000,111%.,13.,.1995,3817%3210%2212%411%.2000,,,:3712%3015%2619%512%.119972001Fig11Variationofdomesticsteelproductionform1997to200148320022.2,4.,3617%3215%2413%615%.144179t,92188%,7112%..22002(t)Table2Domestiproductionandgradesofrailsteelin2002t1852200135650025710000016529731344824103106694841520944680174310174310003605733271600000445914437124879000093050930500039623000039623:396230000396236758006758000093473006948415209097357868300000728200000728200000502473493710000505711962000003,LF,,[3].,,,,,.311,,.,.CaC2Mg,01020%,01005%.215,.,PS01010%.80t,SRP,w[P]01035%,w[S]01010%.,w[S]01010%.31231211[1](1)2000.PD3(S)45#30MnV,,.(2),,,,(1020)10-6;,,Al2O3(3),T[O]2010-6;BD115.582:3Table3Inclusioncontentinrailsteel10-6SiO228564016246637Al2O325393315311519417668872367015511231212,,.()0104%[4].,,,.31213,,,,,[5].,,,.,,011%,.,,,.,012%.1490,,.,.,Al2O3Al2O3,,.,Al,,01004%,200km300km.31214[6],,,C2O,w[C]011%,w[O].P,011%,w[C]011%.w[C]01093%,w[C]011%35%.,Si2Ba2Ca.,,150mm,,,LF.313,,,,[7]:,;,;,;,;.,LFRHVD.31311LF,,.,,,[1].,20%.LF,LF.,,RH,RH.,RH,w[H]110-6,2010-6.,RH,,()5010-6.31312LF2VD.683100tLF,Ar,VD,.31313,LF,[5]:1)LF,,.,,,,,.,,,.LF,,,,.2)VD,,,VD011kPa,0106kPa,15min,8min.VD,[H][O][N]21510-62010-66010-6.31314w(FeO)210%,w(MnO)018%.LF,01006%[6].VD,,.VD4.4,67Pa,,15min,w[H]210-6.w[O]2010-6,.4VDTable4DehydrogenizationeffectofVDtreatmentPaL/minminw[H]10-667220600101701511938014112531431411[8]1).,1991,,7211%,8318%,1117%.,,.2),.,,55%.3),,,.,,,,45%.4).,,.,,.,.31412,:1),,,.2)Al2O3,.Al2O38mm,.3),..314131),[9]:(1),,,.782:(2),.(3),,.(4),,.(5),.,,,,.2)U71Mn,.20006U71Mn,U71Mn[10]:1)HO,;2),,;3).,:1)VD15min,w[H]310-6,w[O]1510-6,HO;2),(30),(200A500A,115Hz118Hz,),(018m/min017m/min),.,60kg/mU71Mn,9918%,9218%.U71Mn,800NARB78900A.20018PD3(200).PD3(200)280mm380mm,200110.3),.,,[5]:(1),,,.(2),,.(3),,.(4),,,,.(5),,.6),,.4),,,,,,;,,,,.,,;,,,,.,f()I(),f=310HzI=300A,45%65%.,F2EMS,.,,,,[8].4(1)LFRHVD,.(2)w[S],01020%.883(3),.(4)LFRHVD,.(5).:[1],,,.[J].,2001,22(3):61-63.[2].[J].,1999,15(6):54-61.[3],.[J].,2000,21(4):78-84.[4],.[J].,1994,(2):31-33.[5],,.[J].,2002,40(2):34-37.[6],.2[J].,2002,40(1):9-13.[7].[J].,2000,16(3):56-60.[8].[J].,1996,17(2):51-57.[9],.[J].,2001,36(12):26-29.[10],,,.1#2#[J].,2002,(4):8-12.982: