18-8Ti不銹鋼高溫力學(xué)性能研究.pdf

1、東北大學(xué)碩士學(xué)位論文188Ti不銹鋼高溫力學(xué)性能研究姓名：康向東申請學(xué)位級別：碩士專業(yè)：材料加工工程指導(dǎo)教師：邸洪雙2003.1.1TheStudyofHigh—TemperatureMechanicalPropertiesof18，8TiStainlessSteelABSTRACTTwinrollthinstripcastingprocessisanewmetallurgicaltechnologythatcandirectlypro

2、ducethethinStripsfrommoltensteelItcarlnotonlydecreasethecapitalinvestment，reducetheprocedure，reducetheenergyconsumptionandtheCOStofproductionsbutalsoimprovethematerialsperformance，soithasbeenattachedimportancetothesteeli

3、ndustryallovertheworldHowevertheindustrializationapplicationoftwinrollthinstripcastingprocessishinderedduetothequalityofthethinstripsbeingcast，andthecrackisoneofthemainfactorsinfluencingonthequalityofthetworollcastingthi

4、nstripsn塒reasonsofcrackformationareverycomplicated。Itisinfluencedbyexteriorelements，suchasequipment，solidifyingconditionandtechnologicaloperation，butbyinteriorelementswiththepermittedmaximumstrengthlimitandthepermittedma

5、ximumdeformationlimitofmaterialButin蠢|lessentialaspect，thecracksareformedbecausethestressthatthethinsolidifyingshellsufferedexceededthepermittedmaximumstrengthlimitanddeformationlimitoftheusedsteel。Cracksareproducedinthe

6、frontedgesofthesolidifyingsteel，andallkindsofcracksareformedduringcoolingprocesssubsequentlyItisnecessarytostudyhi翡temperaturemechanicalpropertiesoftheusedsteelbysimulationtestmethod，sinceitisverydifficulttomeasurehighte

7、mperaturepropertiesinrealproductionprocess，Therefore，thethesisissponsoredbyNationalNaturalScienceFoundationofChinaandtheexperimentalandtheoreticalstudiesofhigh—temperaturepropertiesof18—8Tistainlesssteela托investigatedbyG

8、eelble1500stress／stainsimulationtestmachineT弧emainworksinthisthesisareasfollows：Thenjlductilitytemperatureandnilstrengthtemperatureofthetestedsteelaredefinedthroughthecharacteristiccurvesofductilityands臼engthwithtemperat