柱塞表面激光熔覆組織性能研究及應(yīng)用.pdf

1、中國石油大學(xué)（華東）碩士學(xué)位論文柱塞表面激光熔覆組織性能研究及應(yīng)用姓名：高寧申請學(xué)位級別：碩士專業(yè)：材料科學(xué)與工程指導(dǎo)教師：韓彬201205AbstractInordertoimproVethewearresistanceandcorrosionresistanceofsurfaceofplunger，Lasercladdingtechnologywerecarriedoutonthesurfaceofplungerinthispape

2、rThestereomicroscope，opticalmicroscopescanningelectronmicroscopytransmissionelectronmicroscope，Xraydiffractionandelectronprobeanalysiswereadoptedtoanalyzethesurfacemorphologymicrostructureandphasecompositionoflasercladdi

3、nglayer；TheMicrohardnessoflasercladdinglayerweremeasuredbythemicrohardnesstesterThecorrosionresistanceoflasercladdinglayerwereanalysedbyM283potentiostat，M352andanalysesoftwareThewearresistanceoflasercladdinglayerWasteste

4、dbyMMU一5GtypetribometerBychangingtheparametersoflasercladdingweanalysisthemacroscopicsizeofcladdinglayer，gettingtheValueofmacroscopicsizeofheightwidthfusiondepthanddilutionforGuidingtheproductioninthefutureResultsshowedt

5、hatcladdinglayerofSDFe55haVehomogeneousmicrostructureandsimplephasestructure，Thecladdinglayermatrixissolidsolutionof7(Fe，Ni)andprecipitatedphaseofCr23C6uniformlydistributedinthecladdinglayerTheformationofCr23C6madescladd

6、inglayerhaVingthehardphaseparticleandfixingtheelementsofCrthatenhancewearandcorrosionresistanceAnalysisobtained：ThehardnessValuesofthelasercladdinglayerreached500HV02；Compared麗tllthematrix，CladdinglayerhaVesmallercoeffic

7、ientoffriction，moreflatmorphologyofwearandmorelightandsmallersignsofwear；theequilibriumpotentialofcladdinglayeris一4889mVandtwicethatofthematrixCorrosioncurrentsis8528釁andlowerthanmatrixComprehensiVeeValuation：SDFe55hasch

8、aracteristicsofhighhardnessandwearandcorrosionresistanceissignificantlyhigherthanmatrixByexperimentofplate謝maslope，powderthickness，scanningspeedandcladdingpowerasVariables，AnalysisingValuesofheightwidth，fusiondepthanddil

9、utionofironbaseandnickelbasedcladdinglayerobtained：claddinglayerheightisincreased砸t11theincreaseinthepowderthicknessandlowered麗mcladdingpowerThelawofwidthiscontrar3rfusiondepthanddilutionisloweredwiththeincreaseinthepowd