KT5312AS6汽輪機葉片鋼生產(chǎn)工藝研究.pdf

1、重慶大學碩士學位論文KT5312AS6汽輪機葉片鋼生產(chǎn)工藝研究姓名：肖勇申請學位級別：碩士專業(yè)：冶金工程指導教師：白晨光羅通偉20091001英文摘要AbstractTherapiddeVelopingoftheeconomyinChinad鋤andshuge鋤ountsofelectricenergyThecharact嘶sticsoftllecurrentcomprisingofresourcesdetemlinesmat’ther

2、malpower咎merationindust叮willholditsadVantagesoVeralongp嘶odoftime，andso，memad(etneedsofste鋤turbineswillke印asustained伊eatincreasingThedomesticste鋤turbinemaJlufacturingindustryh硒deVelopedsupercriticalultrasupercriticalste鋤t

3、urbinesbasedontheforeigncountries’exp嘶encesintherecentyearsSubsequently，thealterationofrululingconditionsmal(eshi曲errequirementsfortherelatedmaterialsIIlViewoftheforesaidsitllation，thisp叩erinVestigatedtheef億ctsofchemical

4、composition，melting，refining，andheattreatmelltontllequalityofKT5312AS6steelwhichisbeingdeVelopedbyChanchengSpecialSteelCo，PangangGroupBasedonmeindustIyscaletrialproductions鋤d1aborato巧exp甜ments，theproductionroutesfortllis

5、steelisspecifiedt0ad印tmeproducingfacilitiesofthesaidcompany，thatis，EAFVOD—11telec仃odecasted—a550mmESRi1190t—slowc001ing，annealing—for百ngButmequalityoftheproducedsteelshowsthat’thereeXistssomedi伍cultiestomakethesteeltomee

6、tmeserequirementsasfollowing：theratingsforallclaSsesoft11einclusionsshanbelessmallNo1，thetotalratingsumsofa11inclusions(allthethick，tllinseriesofalltheclassesofinclusions，8it鋤stotaled)shallbeNo25，meVol啪eofFerriteinmewors

7、t6eldshallbelessthan1％，UTshallberatingAaccordingtoGB／T4162TheeXperilnents’studyindicatesthatoxideinclusionispredomin鋤tinthesteelBasedontllefacts，thepapersuggestssome印pmachesteducetheinclusionsThe印proachesincludes，teInoVe

8、tllecontentofoxygenbystren星曲eningofAl—deoxidation，tobemeltedintherouteofEAFLFVODtomaketlleinclusionsnoatupwardadequatelyThroughtheseefrorts，thecontentofoxygenshouldbeoflessthaIl20ppmTheforgingratioshouldbemorethaIl5Theop

9、timizedheattreatingsysteIIlis990～1030℃，O5～2h，c001edinoilf01lowedby570～580℃，lh，CooledquicklyTherecommend猢ealingis770℃690℃690℃，whichd鋤onstratesagoodeffectKeyWords：TuIbineSteel，HeatresistingMartensiticSteel，Refining，HeatTre