外文翻译--连铸的发展

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1、TheDevelopmentofContinuousCasting【连铸】——中英文对照ContinuousCastingFromtheMaking,ShapingandTreatingofSteelbyWilliam，McGraw—HillCompanies,Inc.,2002TheDevelopmentofContinuousCastingContinuouscastingwasdevelopedveryrapidlyaftertheSecondWorldWar.Steel-producersarctodayge

2、nerallyconvincedthatcontinuouscastingisatleastaseconomicalasingotproductionandcanmatchthequalityofthelatteracrossmuchoftheproductionspectrumforhigh-qualitysteels.Continualdevelopmentofthetechniqueaimedatimprovedsteelcharacteristicsisleadingtoincreasingadoptiono

3、ftheprocessinworksproducingspecialhigh-gradesteels.Thereasonsforcontinuous-castingsystemsare:(1)lowerinvestmentoutlaycomparedwiththatforabloomingtrain(mini-steelworks);(2)about10%moreproductivitythanwithconventionalingot-casting;(3)highdegreeofconsistencyofstee

4、lcompositionalongthewholelengthofthestrand;bettercorequality,especiallywithflatstrands;highinherentsurfacequality,leadingtosavingsonanotherwiseexpensivesurfacingprocess;(4)highdegreeofautomation;(5)friendliertotheenvironment;(6)betterworkingconditions.TypesofIn

5、stallationThefirstcontinuous-castingplantswerealignedvertically;however,withlargercross-sections,increasingstrand-length,and,aboveall,withincreasingpouring-ratesthistypeofconstructionleadstounreasonablebuilding-heights.Thesefactorsalsoleadtoaconsiderableincreas

6、einthelengthoftheliquidphasewhichhasmetallurgicaleffects.Thelengthoftheliquidphaseinacontinuously-caststrandisdeterminedbythefollowingformula:L=D2/4x2VcWhereD=strandthickness(mm)x=solidificationcharacteristic(mm/min1/2)Thesevaluesamountto26～33forthewholecooling

7、length.Vc=castingrate(m/min)Effortstoreducebuilding-heightfirstledtocontinuous-castingsystemsinwhichmoltenmetalpassedintoaverticalmouldandsolidifiedcompletelybeforebeingbentorwherethestrandhasbeenintheliquidphaseandlatertothebow-typeinstallationwhichhasacurvedm

8、ouldandisthesystemmostusedtoday.Verticalsystemsandthoseinwhichthestrandisbentwhencompletelysolidifiedhavelongstraightliquidphasesandcanleadtounacceptablyhighcapitaloutlay.Ho