南鋼45#鋼小方坯連鑄二冷系統(tǒng)優(yōu)化研究.pdf

1、重慶大學碩士學位論文南鋼45#鋼小方坯連鑄二冷系統(tǒng)優(yōu)化研究姓名：余杰申請學位級別：碩士專業(yè)：冶金工程指導教師：唐萍20091130英文摘要ABSTRACTAccordingtotheintemaldefectofbillet，crackofworkpiece，crackofrolledpmduCtsandcrackofhotj啪p—test，theresultofEDSandsi舢lationcomfinlled恤ttl：屺mainre

2、2Lsonsareinclusioncontemofbillettoo11i曲鋤df酊laCiouSdi虹butionofinclusionTheunreaSonablesecondarycoolingsystemisalsothereaSonofcrauckintllebilletof45撐steelproducedbyNaIljingIron&steelCoLtdBecauseoftllef；lstr11姐皿ofpromlction

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6、waSmodified觚d呻rovedn而nbeusedforeValuationalldoptimizationofcurrentsecondaD，coolingsy鮞emThe∞condarycooliI唱syStemiIlNansteelw硒optimiZed丘Iomthree唧ectsmat110zzlet)，pes，nozzleammgemem齜ldwater吼lpplyingprincipleiIlsecon(Laryc00

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8、劬mfieldtestofcaster2群，tllecon仃oltosizeanddistributionofsulfidebyoptimizationofseconda巧coolingsyst鋤havebeenconfimedButthecrackisstillexist、)l，!heninclllsioncontentistoolli曲Therefore，t11ecomrolofinclusoncontentis砌ispellsab