摘要
Themechanicalandcorrosionperformanceoflowalloysteeltubulargoodsdependsonthemicrostructureobtainedasaresultofthecombinationofalloyingelementsandmanufacturingprocessparameters.Thebasicdesignphilosophyfortheselectionofthealloyingelementsisruledbythebalancebetweenthesteelcostandthematerialperformance.Followingthisapproachthealloyingsequenceforthemanufacturingoftubularcomponentsinoilcountrytubulargoods(OCTG)applicationisgenerallyMn,C,randMo,usedassubstitutionalelementsinatotaladdedweightconcentrationaround1%upto3%.OtherelementssuchasB,Ti,NbandVareappliedasstrengtheningmicroalloyingelementsformingfineprecipitates.AlackofexperienceisfoundrelatedtotheuseofTungsten(W)onOCTGapplications,althoughWisalsoasubstitutionalelementthatbelongstogroup6oftheperiodictabletogetherwithCrandMo.OntheotherhandWiswidelyaddedforsteelpipesworkinginhightemperatureservicessuchaspowerplantboilers,wherecreepresistanceisneeded.Itisalsoappliedfortoolsteelsenhancingthehardness,wearresistanceandcuttingperformance.TakenintoconsiderationthesimilaritybetweenCr,MoandWandtheapplicationswhereWhasbeenprovenitwasdecidedtoanalyzethefeasibilityofusingWasanalternativealloyingelementforsomeOCTGapplications.AnotherfactorthatdrivesthisstudyisthefactthatWcouldbeacosteffectivesubstituteofMo,dependingonthealloymarketprice.Thispaperisbasedonliteraturereviewandexperimentalactivitydoneonlaboratorysteelsinwhich0.1%Mowasreplacedby0.2%and0.4%W.Thedifferentfindingsinregardswithmanufacturingprocessconsiderations,materialperformanceandthepossibleuseofWalloyedsteelforOCTGapplicationsaresummarized.(1)OpposedtothesusceptibilityshownbylowcarbonwithhighCr-Wcontent,hotcracksarenotexpectedinmediumCsteels(0.2%-0.3%)withWadditionupto1%.(2)Microporosity-relateddefectscouldfo
出版日期
2010年10月04日（中国Betway体育网页登陆平台首次上网日期，不代表论文的发表时间）
