無(wú)取向硅鋼連鑄中間包及結(jié)晶器流場(chǎng)研究.pdf

1、武漢科技大學(xué)碩士學(xué)位論文無(wú)取向硅鋼連鑄中間包及結(jié)晶器流場(chǎng)研究姓名：廖廣府申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：鋼鐵冶金指導(dǎo)教師：李光強(qiáng)20110529第1I頁(yè)武漢科技大學(xué)碩士學(xué)位論文AbstractTundishiSconsideringasthecontinuousreactioncontaineramongthemoltensteelandotherthreephasessuchasgas，slagandrefractoryItshouldpla

2、yanimportantroleinimprovingtheflowfield，promotingtheinclusionfloatingupMoldisthelaststeptocontrolthepurityofthemoltensteel，wherethetransferbehaviorhasagreateffectinslagentrainment，inclusionrising，thesurfacequalityoftheca

3、stingslabThepresentworkistooptimizetheinteriorflowcontrollingconfigurationofmndish，theimmersionnozzleconfigurationandtheoperationparametertsofmoldinasteelplantwiththewatermodel111epresentstudychoosesthesimilarityratio1／4

4、，investigatefourfactorstotheinfluenceoftheflowfieldintundish，suchasthedepthofweirtheheightofdam，thedistancebetweenweiranddam，thedistancebetweenweirandturbulencesuppresseragainsttherequiremetsofthesteelplantandthereferenc

5、ereported111eoptimizationdesignwasvalidatedinthemathematicalsimulationThePapel“alsostudiesthesefourfactorstotheinfluenceoftheliquidlevelfluctuationinmoldandtheimpact，depththeangleoftheimmersionnozzleoutlettheinserteddept

6、h，thecastingspeedandthedimensionoftheimmersionnozzleoutletmconclusionindicates：(1)Inthepresentexperiments，thedeadvolumefraction鶴astandardtoevaluatetheflowfieldintundish，theorderoffactorssizeis，damheight，weirdepth，thodist

7、ancebetweenweirandturbulencesuppresserthedistancebewteenweiranddam(2)TheoptimizationexperimentalprogramoftundishisA482C1D2，namelythedepthofweir265mmtheheightofdam110mm，thedistancebetweenweiranddam75mm，thedistancebetweenw

8、eirandturbulencesuppresser483mmComparingwiththeplototypedesignprogram，itprolongtheaverageresidencetime35％，reducethevolumefractionofdeadzone1988％BasedontheNewtonformulatheinclusiondiameterlargerthan321xmcouldfloatupsidewi

9、thin170seconds(3)Increasingthecastingspeed(from10m／rainto12m／min)aggravatesthefluctuationofliquidlevelinmold，Occursthepowderentrainmenteasilyandgoesagainstthecontinuouscastingoperationsaffectsthequalityofcastingslabserio

10、usly111eimpactdepthincreases，theinclusionenterintoliquidcoredeeplyalongthedownstream，andtheinclusionfloathardly皿esmallercastingspeedwilldecreasethepowderentrainment(4)Increasingtheinserteddepthofimmersionnozzle(from30mmt

11、o425mm)ortheangleofnozzleoutlet(from150to350)，theimpactpointfall，decreasetheliquidlevelfluctuationandthepowderentrainment，butincreasethedifficultyofmeltingthepowderandnotwellformeinclusionfloatingThefewerareaofthenozzleo