09cuptireb耐候鋼冶煉技術(shù)研究

1、武漢科技大學碩士學位論文09CuPTiREB耐候鋼冶煉技術(shù)研究姓名：阮建波申請學位級別：碩士專業(yè)：鋼鐵冶金指導教師：章奉山20041106武漢科技大學碩士學位論文第2頁AbstractWeatheringsteel，alsonamedatmospherecorrosionresistantsteel，isakindoflowalloyhighstrengthsteelwhichcontainsaamountofalloyedelemen

2、ts，suchas，Cu，只CrTi，NiandSOon09CuPTiREAsteeliSproducedbyWISCOandChinesecharacterizedCuP—REseriesweatheringsteelusedforrailwayrollingstockItsproductqualitieshavereachedadvancedinternallevelsandbeenappointedbytherailwaymini

3、strythesteelswhicharemaderailwayrollingstock，Withthedevelopmentoftrains’increasingspeedandlightweighting，therailwayministryhasputforwardahigherdemandfor09CuPTiREsteel，ItsstrengthmustbeimprovedfromAgradetoBgradeexceptfors

4、uperiorcorrosionresistantproperties，thisistosayitsyieldstrengthandtensiblestrengtharerequestedform295MPa，395MPato345MPa，490MPa，respectivelyandexcellentplasticityandtoughnessafterenhancingstrengthOnthepremiseofnohugelycha

5、ngingthepresentproductionprocess，noincreasingproductionCOStandnoalteringtherangeof09CuPTiRE—Asteels’chemicalcomposition，thecleanlinessandhomogeneityofthesteelareimprovedbymeansofadjustingcompositioncontrolobject，playingt

6、hemicroalloyedelementsandREpartstothefull，rigidcontrolOfinclusion’samount，sizeandform，ectBasedonthemtherollingandcoolingprocessareoptimizedinordertOfinegrainmicrostructureareobtained，referringtOstrengtheningand，，tougheni

7、ngmechanismofmicroalloyedsteelsThefunctionofprecipitationanddislocationsubstructurestrengtheningarealsoimportantforimprovingstrengthandtoughnessinadditiontofinegrainstrengtheningTheindustrialtestshavebeencarriedoutintheN

8、o2steelmakingplantofWISCOThemainelements’weightpercentofteststeelscompletelyreachcontrolobjectandtheirfluctuationisinanarrowallowablebandAverageareapercentofinclusioninsteelsislessthan01％itsdiameterislessthan4gmwithalarg

9、epercentamountto99％Theresultsshowthattheteststeel’Smicrostructurecontainingfineequiaxedferritealittleofacicularferriteandpearlitehasgoodmechanicalpropertiesandbasicallymeetsrequirementsof09CuPTiREBsteelwithyieldstrength，