the development of continuous casting连铸翻译

《the development of continuous casting连铸翻译》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、TheDevelopmentofContinuousCasting【连铸】ContinuousCastingFromtheMaking,ShapingandTreatingofSteelbyWilliam，McGraw—HillCompanies,Inc.,2002TheDevelopmentofContinuousCastingContinuouscastingwasdevelopedveryrapidlyaftertheSecondWorldWar.Steel-producersarctodaygenerally

2、convincedthatcontinuouscastingisatleastaseconomicalasingotproductionandcanmatchthequalityofthelatteracrossmuchoftheproductionspectrumforhigh-qualitysteels.Continualdevelopmentofthetechniqueaimedatimprovedsteelcharacteristicsisleadingtoincreasingadoptionofthepro

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

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

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

6、engthoftheliquidphasewhichhasmetallurgicaleffects.Thelengthoftheliquidphaseinacontinuously-caststrandisdeterminedbythefollowingformula:L=D2/4x2Vc17WhereD=strandthickness(mm)x=solidificationcharacteristic(mm/min1/2)Thesevaluesamountto26~33forthewholecoolinglengt

7、h.Vc=castingrate(m/min)Effortstoreducebuilding-heightfirstledtocontinuous-castingsystemsinwhichmoltenmetalpassedintoaverticalmouldandsolidifiedcompletelybeforebeingbentorwherethestrandhasbeenintheliquidphaseandlatertothebow-typeinstallationwhichhasacurvedmoulda

8、ndisthesystemmostusedtoday.Verticalsystemsandthoseinwhichthestrandisbentwhencompletelysolidifiedhavelongstraightliquidphasesandcanleadtounacceptablyhighcapitaloutlay.However