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1、先进铸造技术英文文献翻译沈阳理工大学材料科学与工程学院学生姓名王鹏飞班级09050101学号17课程题目先进铸造技术指导教师杜晓明文献题目:《Modellingthedynamicsofthetilt-castingprocessandtheeffectofthemoulddesignonthecastingquality》H.Wanga,G.Djambazova,K.A.Pericleousa,R.A.Hardingb,M.WickinsbCentreforNumericalModellingandProcessAnalysis,UniversityofG
2、reenwich,LondonSE109LS,UKbIRCinMaterialsProcessing,UniversityofBirmingham,Birmingham,B152TT,UReceived29June2010Revised9November2010Accepted12November2010Availableonline21November2010AbstractAlltitaniumalloysarehighlyreactiveinthemoltenconditionandsoareusuallymeltedinawater-cooledco
3、ppercrucibletoavoidcontaminationusingprocessessuchasInductionSkullMelting(ISM).Theseprovideonlylimitedsuperheatwhich,coupledwiththesurfaceturbulenceinherentinmostconventionalmouldfillingprocesses,resultsinentrainmentdefectssuchasbubblesinthecastings.Toovercometheseproblems,anovelti
4、lt-castingprocesshasbeendevelopedinwhichthemouldisattacheddirectlytotheISMcrucibleholdingthemeltandthetwoarethenrotatedtogethertoachieveatranquiltransferofthemetalintothemould.Fromthemodellingpointofview,thisprocessinvolvescomplexthree-phaseflow,heattransferandsolidification.Inthis
5、paper,thedevelopmentofanumericalmodelofthetilt-castingprocessispresentedfeaturingseveralnovelalgorithmdevelopmentsintroducedintoageneralCFDpackage(PHYSICA)tomodelthecomplexdynamicinteractionoftheliquidmetalandmeltingatmosphere.Thesedevelopmentsrelatetothefronttrackingandheattransfe
6、rrepresentationsandtoacasting-specificadaptationoftheturbulencemodeltoaccountforanadvancingsolidfront.Calculationshavebeenperformedfora0.4 mlongturbinebladecastinatitaniumaluminidealloyusingdifferentmoulddesigns.Itisshownthatthefeeder/basinconfigurationhasacrucialinfluenceonthecast
7、ingquality.Thecomputationalresultsarevalidatedagainstactualcastingsandareusedtosupportanexperimentalprogramme.Althoughfluidflowandheattransferareinseparableinacasting,theemphasisinthispaperwillbeonthefluiddynamicsofmouldfillinganditsinfluenceoncastqualityratherthanheattransferandso
8、lidificationwhichhasbeenre
