反应氮弧熔覆tin-tib2%2ffe基复合涂层组织与耐磨性研究

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1、万方数据ResearchonStructureandWearResistanceofTiN—TiB2／FeMetalCeramicCoatingPreparedByReactiOnNitrogenArcCladdingAuthor：GengZhenSupervisor：HaojianjunM萄or：AgriculturalMechanizationEngineeringAbstractConst锄timproVementofagriculturalmechaJlizationaIldautomatiOnrequiresincreasinglyh

2、igherofperfonllancesofagriculturaltools．HoweVer，toolwearresultsinreducedwholepe订、o珊ance，heaVierworkingresistallcea11dincreased如elconsumption；行equentreplacementdelaysthefa眦ingseasonaIldincreasesthecostinactualproduction．Thus，itisofgreatsigni6cancetoproduceagriculturaltoolswit

3、lllowcosta11dhi曲sen，icelifesoastocatchupwithfaStdeVelopmentofmodemagriculnlralmechanization．WithnitI．ogenastheprotectiVegasandreactantgas，thistopicadoptsreactionni仃ogenarccladdingtecllnologyandWSME-630argonarcweldertorealizein—situsyntIlesisofTiN-TiB2／Fecemletcompositecoatin

4、gonQ235matrixwhichispre-coatedwithTipowder，BNpowderandNi60powdersoaStoimproVeabrasiVeresistallceofa酊culturaltoolsaJldextendt11ese州celife，studiesf．eanlre，phase，hardnessaIldabrasiVeresistaIlceofthecoatingbyKYKY-2800BscallIlingelectronmicroscope，D／ma)【一2500rotatinganodeX·raydif

5、hactometer，S一4800coldfieldemissionscanningelectmnmicroscopeene唱ydiSpersiVespectrometer，MH-6microhardnesstesterandHRS一2Mreciprocating衔ctionweartester，optimizestecllIlologicalpar锄etersaIldanalyzesfonIlationmechaIlismaIldwea卜resistaIlcemechanismofTiN-TiB2／Fecoating．Additionally

6、’thistopicstudiesinfluencesofdi毹rentcontentsofbindingphaseNi60uponcoatingmoldingandmicroscopicstmcture，confi册sthatthecoatingisflatafldeVenlyfornled、vithoutopendefectswhenthebindingphaseproponionisabout40％andtheabrasiveresiStaJlceiscomp甜ativelygood．ItisobserVedbyelectmnmicros

7、copethatthecoatingcanbedividedintocoatingzone，bindingzoneaIldbasezone．Atransitionbeltwithgoodmetallu唱icalbondingisfomedinthebindingzonebetween廿lecoatingandmebase．Moreover，singlefactorexperimemisc删edouttostudyinfluencesofnitrogennow，claddingcurrentandcladdingvelocityuponstmct

8、ure，hardnessand衔ctioncoemcientofthecoating；theresultsshowthattoolownitrogen