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时间:2020-04-30
《Cr3C2对Ti(C,N)基金属陶瓷微观组织和力学性能的影响.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、Availableonlineatwww.sciencedirect.corn·一,,·一Transactionsof·:,ScienceDirectNonferrousMetalsSocietyofChinaPressTrans.NonferrousMet.Soc.China22(2012)1096—1105www.tnmsc.caEffectofVC/Cr3C2onmicrostructureandmechanicalpropertiesofTi(C,N)一basedcermetsZHANBin’。
2、,LIUNing’。,JINZhi。bo,LIQi—long,SHIJin.gang1.DepartmentofMaterialsScienceandEngineering,HefeiUniversityofTechnology,Hefei230009,China;2.EngineeringLaboratoryofNonferrousMaterialsandProcessingofAnhuiProvince,Hefei230009,ChinaReceived18April2011;accepted30S
3、eptember2011Abstract:EfiectsofVC/CrC2onthemicrostructureandmechanicalpropertiesofTifC,N1。basedcermetswerestudied.Themicrostructurewasinvestigatedbymeansofoptica1microscopy.X—raydiffractometryaswellasscanningelectronmicroscopyincombinationwitl1energydispe
4、rsivespectrometry.Mechanicalproperties.suchastransverserupturestrength.hardnessandfracturetoughness.weremeasured.Theresultsshowthatthereareblackcore-greyrimstructureandwhitecore-greyrimstructureinthemicrostructure.ThegrainsbecomefineduetotheVC/CrC,andthe
5、grainsofcermetaddedwith0.75VC/0.25CrC,arerefinedmostremarkably.TheblackcorebecomesfinerwiththeincreaseOfVCadditionandrimphasebecomesthickerwiththedecreaseOfCr3C2addition.Theporosityincreaseswiththeincrease0fVCadditioninVC/CrC2.Comparedwiththecermetfreeof
6、VC/CrC,,thetransverserupturestrengthandhardnessofcermetswithVC/Cr3C,arebothimproved.andthemaximumvaluesarebothfoundforthecermetwim0.25VC/0.75Cr3C,.ThefracturetoughnesscanbeeffectivelypromotedbyaddingVC/Cr1C,withanappropriateratioofVCtoCr3C,,andthemaximum
7、valueisfoundforthecermetwith0.5VC/0.5CrC,.Keywords:Ti(C,N)-basedcermet;VC:Cr3C,:microstructure;mechanicalpropertiesgrowthistoaddasmallamountofgraingrowthinhibitor.lIntrOductiOnmetalliccarbide,suchasVC,Cr3C2,NbCorMo2C,intothestartingpowdermixtures[7—11],a
8、ndtheinhibitingTi(C,N)一basedcermetsconsistmainlyofhardeffectsofVCandCr3C2arethebestofall『12].carbonitridegrains,whicharecalledashardphase,AlthoughthereisconsanguinitybetweencementedembeddedinatoughbinderphasethatisbasedonN
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