原位合成熔鑄法制備TiC顆粒增強2Cr13鋼基復(fù)合材料顯微組織、性能及工藝研究.pdf

1、東南大學碩士學位論文原位合成熔鑄法制備TiC顆粒增強2Cr13鋼基復(fù)合材料顯微組織、性能及工藝研究姓名：樊泉申請學位級別：碩士專業(yè)：材料學指導(dǎo)教師：孫揚善20030301—|士●—蛾3tFabrication，MicrostruetureandMechanicalPropertiesofTiCParticlesReinforced2Crl3MatrixCompositeABS7耶5tACTncparticulatereinforced2

2、Crl3matrix(TiCp／2Crl3)compositeshavebeenprocessedbyinsitusolidificationtechnologyinthisthesisAfterappropriatethemomechaniealprocessingandheattreatmentthecompositeshavebeensuccessfullyproducedThemicrostructuresofcomposite

3、sthedistributionandmorphologyof幣CparticleshavebeeninvestigatedbyusingOMSEM，XRDand$mneothermodeminstnlments111emechanicalproperties，wearandcorrosionresistanceofthecompositeshavealsobeeninvestigated，n“insitusolidificationt

4、edmologYhasbeenprovedtobesncccssfulforthefabricationoftheTiCocompositesReactionoftitaniumwithcarboniIlthemeltoCCUlsathightemperatures，whichresultedintheformationofncparticleswithhighthermalstability11幛lagescaleingotscana

5、lsobeenproducedbyusingthetechniquesdevelopedinthepresentworkn他studyonthetechniquesofthermomechardealprocessingandheattreatmenthasshownthatforgingrolling，annealing，quenchingandtemperingwerehelpfulfurtheimprovementofthemic

6、rostructuresandpropertiesoftIlecompositesThemartcnsitemicrostructurehasbeenobservedinthesamplesofcompositesquenchedinairaswellasinoilWiththedecreaseoftemperingtemperature，thetensilestrength，yieldstrengthandhardnessofthec

7、ompositesincreases，buttheelongationdecreasesThebasealloy(2Crl3)showstemperembrittlementwhenitwastemperedat500—550。CT1lewearresistanceofthecompositeshaschangedalittlewhenitwastemperedatdifferenttemperaturesMicrostructural

8、observationsonhecompositeshaveshownthatwhenthefractionofTiCinthecompositewas3wt％and4wt％andtheratiooftitaniumtocarboniotheaddwasl：land3：2nCparticleshaveanuniformdistributionandthesizeoftheTiCparticleshasrangedbetween5to10

9、9raWhenthefractionofTiCwas5wt％ortheratiooftitaninmt0carboninthepreformwas2：3，thesegregationoftheTiCparticlesoccursTestsofthemechanicalpropertiesofthecompositeshaveshownthattheadditionofnCparticlesimprovedthetensilestreng

10、thandyieldstrengthatroomtemperatureThecompositewith4wt％TiCandal：lratiooftitaniumt0carboninthepreformhasthehighestensilestrengthandyieldstrengthhowevertheelongationandtoughnessofthecompositesislowerthanthatofthebasealloyn

11、塘weal“resistanceofthecompo；iteshasbeenimpmvedremarkablybecauseofthe啊CadditionWiththeincreaseof弱C婦fionthewearresistanceofthecompositesincreasesnkcorrosionresistanceofthecompositesisbctterthanthatof2Crl3，howeveritdecreases

12、withtheincreaseofTiCfractionandthecontentofcarboninthepreformWhenthecontentof啊Cis3wt％and4wt％andtheratiooftitaniumtocarboninthepreformisl：Iand3：2thecompositeshasexcellentcomprehensiveproperties11flecompositestemperedat350

13、℃couldmeettherequirementofthebladematerialUnderthewater1ubrieatinnfrictionconditionsthecomposiresshowabetterwearresistancethanthe812CoalloyKeywords：TiC，2CrDstainlesssteelcomposites，mierostruetaremechanicalpmpertieswearre