高溫減摩耐磨涂層的設(shè)計(jì)與研制.pdf

1、重慶大學(xué)碩士學(xué)位論文高溫減摩耐磨涂層的設(shè)計(jì)與研制姓名：周靜申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：機(jī)械設(shè)計(jì)及理論指導(dǎo)教師：韋云隆2001.4.8重塞盔蘭堡主蘭垡笙苧壹塑墮壁墮壁堡星墮堡鹽量塹型ABSrI’RAC’I’Inthispaperaimingatthehigh—temperatureworkingconditionandtheilllubricatingstatusofpistonringinsomehigh—powerandlowheatre

2、jectiondiesel，selflubricatingandanti—wearcompsitecoatingforhigh—temperaturewasdesignedandmanufacturedNotonlythecompsitecoatingCanworksafelyinhigh—temperature，butalsoCallreducefrictionandminishweareffectivelyOnthebasisoft

3、ribologyprinciples，thekeypointindesigningselflubricatingandantiwearcompsitecoatingwasthatbasis、lubricantsandwearableelementswerechoseninreasonSo，inthispapernickelchromiumalloywithexcellenthightemperaturecapabilityandacer

4、tainselflubricatingcapabilitywasselectedasonebasis；andZr02ceramicwaschosenastheotherbasisforitseximiousanti—oxidationcapabilityW色11Ag、CaF2、C、MoS2andBNwerepickedoutas1ubricantsfroma11kindsofsolidlubricantsusedfromlow—temp

5、eraturetohightemperatureMoreoverCr3C2horninessparticlewasfixedaswearableelementAtlast，becauseofthehighanddifferentmeltingpointsoftheelementsselected，plasmaspraywasdeterminedtopreparethecompsitecoatingAfterreducingfrictio

6、ntest、minishingweartestandanti—oxidationtestitWasdisplayedthatthenickel—chromiumalloycompsitecoatingdesignedkeptalowglidingfrictioncoefficientas02allthetimewithoutliquidlubricantsfrom300centigradeto900centigradeAlso，thec

7、oatingkeptawearcoemcientunder023105mm。／NminthesamestatusbeforeThetwocapabilitydataa11attainedtothetechniquerequestsThenickelchromiumalloycompsitecoatingachievedeffectivelubricatingWell，Zr02ceramiccompsitecoatingdesigneds

8、howedpotentialsinhyper一800centigradeworkingconditionTheresultsofbondstrengthtest、microhardnesstestandScanningElectronMicroscopy(SEM)analysisshowedthatgradentstructureforcoatingexcelledmonolayerstructureGradentstructurere

9、laxedthedifferenceofthephysicalcapabilityincoating；andthemicrohardnesswaschangedgentlyThebondstrengthandcapabilitywereclearlyimprovedalsoPassingtheexaminationofhardness、anti—frictionandantiwearcapabilityandSEMabouttherem

10、eltingcoatingbylaserremeltingtreatmenttechnics，itwasrevealedthattheporeratiooftheremeltinglayerreducedevidently，andthedensityofthelayerincreasedatthesametimeFurthermorethemicrohardnessandanti—wearcapabilityoftheremelting