WC基硬質(zhì)合金材料制備及摩擦磨損性能研究.pdf

1、浙江理工大學(xué)碩士學(xué)位論文WC基硬質(zhì)合金材料制備及摩擦磨損性能研究姓名：張術(shù)永申請學(xué)位級別：碩士專業(yè)：機(jī)械設(shè)計及理論指導(dǎo)教師：郭紹義20081229浙江理I：人學(xué)碩學(xué)位論文AbstractCementedcarbidewasusedwidelyinthefieldofdiemachiningbecauseofitsexcellenthardnessandwearresistantperformanceButwiththespeedofma

2、chiningrising，therequirementofcementedcarbideperformancemustbeimprovedTherefore，theresearchanddevelopmentofhigh—poweredcementedcarbidehavetheoreticandrealisticsignificancesFivedifferentkindsoftungstencarbidewerepreparedb

3、yChemicalCoprecipitationSynthesismethodandSprayDryingprocesswithThermalPressureSintefingtechnologyMeanwhile，theanalysisofsamplesonmicrostructureandperformancewasdoneAndthentheconnectionbetweenstructureandtribologicalprop

4、ertywasresearchedItCannotberesearchedontribologicalpropertyofthiskindcementedcarbideduetothefastwearingbetweenitselfandnormalmetalpin，SOtheceramicofSi3N4waschosenascontactpinThesamplewiththebestperformanceWasselectedthro

5、ughtheexperimentalcomparationThetestoftribologicalpropertywasdonebetweenthebesttungstencarbideandnormalcermetThewearmechanismsoftungstencarbideswithdifferenttribologicalpropertywerestudiedusingSEMandStereomicroscope，then

6、theaffectivefactorsandruleswereanalysedConclusionshowedthatthecontentofcement(CoandNi)willaffecttribologicalpropertydirectlyTheperformanceoftungstencarbidewhichcontained22％cementwasthebestThetribologicalperformanceoftung

7、stencarbidewasmorebetterthancermetThewearmechanismofcermetwasabrasivewearandbrittleexfoliateOtherwise，thewearmechanismoftungstencarbidedependedonitscontentofcement，adhesivewearcorrespondtohighcontentofcementandabrasivewe

8、al“correspondtolowcontentofcementThecermetwillwearseriouslyafterthefrictionstressincontactsurfaceoverthelimitoffracture，butthereisnoobviousfractureonsurfaceoftungstencarbideThewearmechanismwaschangedbecauseofcementoftung