钒在钢中的应用-杨雄飞

IntroductionofRecentDevelopmentofVanadiumContainingSteels报告内容•钒市场简介•钒作用新发现–热塑性–V作用–热轧–冷轧–PH？0.010.020.030.040.050.060.070.080.0200120022003200420052006200720082009201020112012000MTVVProductionbyRegionAustraliaOtherNorthAmericaEuropeRussiaSouthAfricaChina全球钒产量–按地区或国家统计来源：国际金属业咨询公司Source:TTPSquaredInc澳大利亚其它北美欧洲俄罗斯南非中国59%31%4%3%2%0%1%VUsebyApplication2012CSteelSpecialSteelSuperAlloys/TitaniumAlloysChemicalsCastIronVMetalStainlessSteel2012年钒的应用领域来源：国际金属业咨询公司Source:TTPSquaredInc碳钢特殊钢超级合金/钛合金化学制品铸铁钒金属不锈钢0.010.020.030.040.050.060.070.080.090.0200120022003200420052006200720082009201020112012000MTVVConsumptionbyRegionCISJapanNorthAmericaEuropeOtherChina来源：国际金属业咨询公司Source:TTPSquaredInc全球钒的消耗–按地区或国家统计其它北美欧洲中国日本苏联全球钒的生产和消耗历史HistoricalProductionvConsumption0.010.020.030.040.050.060.070.080.0200120022003200420052006200720082009201020112012000MTVVProductionbyRegionAustraliaOtherNorthAmericaEuropeRussiaSouthAfricaChina钒的生产-按地区或国家统计0.010.020.030.040.050.060.070.080.090.0200120022003200420052006200720082009201020112012000MTVVConsumptionbyRegionCISJapanNorthAmericaEuropeOtherChina钒的消耗-按地区或国家统计来源：国际金属业咨询公司Source:TTPSquaredInc报告内容•钒市场简介•钒作用新发现–热塑性–V作用–热轧–冷轧–PH？VanadiumImprovesHotDuctilityofNbContainingSteelsofPeritecticCContents2011VanadiumAwardAddingVtotheTi–Nbcontainingsteelsresultedinsignificantlyimprovedductilitywithreductioninareavaluesat800Cinexcessof45%.Thisimprovementwasduetoadecreaseinthefractionoffineparticles,andinaccordwiththisbetterductility,transversecrackingofindustrialslabswasavoided.EffectofV-NMicroalloyingontheStrength300400500600700800900100000.050.10.150.20.25强度Strength(MPa)钒含量Vanadium(wt.%)0.007N0.016NUTSYS35040045050055060065070000.050.10.15屈服强度，YieldStrength,MPa钒，Vanadium,wt,.%N»80-150ppmN»40-80ppmRebarSteelMAForgingSteelFerriteGrainRefinementInSeamlessPipesthroughIntragranularNucleationonVN0.17C-1.62Mn0.17C-1.63Mn-0.107V-0.017NStandardprocessingofV-steelwith0.1%V-0.015%Nisabletoinduceintragranularferriteandproduceafineferrite-pearlitemicrostructurewithanaverageferritegrainsizeof7um.Theproposedconceptofrollingwithintragranularferriteformationisabletoeliminatein-linenormalising,andthusprovidesacleareconomicalbenefitforseamlesstubeprocessing.S.Zajac,B.Hutchinson,R.Lagneborg,M.Korchynskylametallurgiaitalianafebbraio2009PrecipitationofV(C,N)inFerriteInterphaseprecipitationofVCinproeutectoidferrite在珠光体中析出的VCPrecipitationofVCinpearliticferriteV(C,N)PrecipitationofV(C,N)inFerriteafterthetransformationCSiMnTiVNA0,19701,4751,5100,00210,00350,0016B0,18611,4771,5280,00240,10810,0078C0,18881,4721,5270,00260,21450,0157AddNitrogentoaccelerateVanadiumprecipitationkinetics0%V0.15%VSelectivehardeningofferrite(TRIPsteels)Microstructurerefinementbutnotenoughtoexplainimprovedproperties卷取温度=400C[Tcoil=400°C]Klemm腐蚀[Klemmetching]0.15V铁素体+贝氏体[Ferrite+bainite]残余奥氏体[Retainedaustenite]0V钒对相分数具有较小的影响[SmalleffectofVonphasefractions]添加钒和氮明显地细化了显微组织[StrongrefinementofmicrostructureswithV&Nadditions]充分量的残余奥氏体[Sufficientamountofres.Austenite]卷取温度对显微组织没有影响[Noeffectofcoilingtemperature]0V：残余奥氏体百分数=16.2%,残余奥氏体晶粒尺寸(d)=1.0m[0V:res=16.2%,d=1.0µm]0.15V：残余奥氏体奥氏体百分数=13.5%,残余奥氏体晶粒尺寸(d)=0.7m[0.15V:res=13.5%,d=0.7µm]TRIP钢–钒可用于细化显微组织和获得析出强化[TRIPsteels.–Vanadiummaybeusedtorefinethemicrostructureandobtainprecipitationstrengthening.]TRIP钢–钒可用于细化显微组织和获得析出强化[TRIPsteels.–Vanadiummaybeusedtorefinethemicrostructureandobtainprecipitationstrengthening.]1µm100nm残余奥氏体[Res.austenite]在残余奥氏体中呈现较少的析出物，在铁素体中呈现高密度的析出物。[Fewprecipitatesinretainedaustenite.Highdensityinferrite]铁素体EffectofVanadiumontheStrengthofUltra-HighStrengthofTRIPSteelVanadiumImprovesDuctilityofTemperedSpringSteelOilquenchedandtemperedat350°C/1hourA.ArdehaliBarani,F.Li,P.Romano,D.Ponge,D.Raabe,Mat.Sci.Eng.A463(2007)pp138贝氏体钢BainiticSteels•钒在新开发的贝氏体钢中是一种有效的强化剂Vanadiumisaneffectivestrengtheningagentinrecentlydevelopedbainiticsteels–热轧高强度（抗拉强度700MPa）贝氏体带钢Highstrength(YS700MPa)hotrolledbainiticstrip–空冷高强度贝氏体锻钢Highstrengthaircooledbainiticforgingsteels–用于汽车车身的热轧贝氏体带钢Hotrolledbainiticstripforautomotivebody抗拉强度，MPaVanadiumImprovesTemperResistanceinBainiticSteel CMnCrMoAlNV0.0421.551.000.300.0240.0120.079B.Hutchinson,T.Siwecki,J.Komenda,J.Hagstrom,R.Lagneborg,J.-E.HedinandM.Gladh,IronmakingandSteelmaking,May24,2013钒在BH钢中应用•退火过程中VC溶解•固溶C量可由退火温度控制–实现可控制的BH值–BH值高VBHSteel01020304050775825875925AnnealingSoakTemperature,℃BakeHardeningIndex,MPaTi-NbV-TiTi-Nb退火温度（℃）BH指数（MPa）钒在BH钢中应用CSiMnPSTiVAlN0.00780.010.170.010.0030.020.080.00270.0040.000150.00020.000250.00030.000350.0004740760780800820840AnnealingTemperature,°C[C](molefraction)max.[C][C](48ppm)(18ppm)(24ppm)(30ppm)(36ppm)(42ppm)退火温度（℃）[C][摩尔分数]冷轧DP钢（匹兹堡大学）•DP980实验室熔炼工艺路线真空感应炉熔炼铸锭再加热1200°C/2hrs热轧至3mm粗轧终轧温度920°C冷却速率10或15°C/s卷取温度550°C冷轧至1.4mm(60%)冷轧DP9800.024%Nb-0.006%N0.065V-0.02%Nb-0.0063%N0.062%V-0.019%Nb-0.0142%N0.101%V-0.019%Nb-0.0133%N冷轧DP980•V和N添加到Nb钢中，在冷却及镀锌后实现显著的组织细化0.15%C-0%V-0.024%Nb-0.006%N0.145%C-0.062%V-0.019%Nb-0.0142%NH陷阱作用•V(C,N)析出物起作H陷阱位置•抗氢致延迟开裂、抗搪瓷钢板的鱼鳞爆作用0%V0.3%V1%VHitoshiASAHIet.al.,ISIJInternational,Vol.43(2003),No.4,p