金屬表面的電火花改性技術研究.pdf

1、西安工業(yè)學院碩士學位論文金屬表面的電火花改性技術研究姓名：蔣寶慶申請學位級別：碩士專業(yè)：機械制造及其自動化指導教師：范植堅李福援20050301SurfaceModificationofElectricalDischargeCoatingintheLiquidMediumDiscipline：MechanicalManufacture&AutomatizationStudentsignature：Supervisorsignature：

2、2菇磐：加彬MAbstractInthisthesis，byutilizingelectricaldischargemachineandchoosingdifferentelectrodematerials，suchasW，WC，Co，TiCandFe，etcthesurfacesof45steel，LC4aluminumalloyandl3Crweretreatedwiththetechnicsofelectricaldischarg

3、ecoatingInaddition，theformingmechanism，thestructureandthecharactersofthesurfacechanginglayeraresystemicallyresearchedaswellastheelementdistributionwasstudiedInordertoimprovethecoatingproductivenessandthequalityofthelayer

4、s，thelayers’qualityhardness，wearingresistanceanddepthareinspectedunderdifferenttechnologicalparametersSUchasthepulsewidth，theintervalwidththepeakelectricalcurrentvalue，thevoltageandthetreatingtimeAnoptimumtechnologywaspu

5、tforwardAccordingtotheanalysesofthexraydiffraction，lineSCanandthescanningelectronmicroscope，thetreatedlayerisconsistedofcarbides，theelementsofelectrodeandthemediumTheelectricaldischargecoatingisnotonlyaprogressofelectrod

6、e’soverlayingontheworkpieces’surfaces，butalsoacomplicatedalloyingandmetallurgyprogressoftheelementscomingfromtheelectrodesandtheworkpieceandtheionscomingfromthemediumintheconditionofhightemperatureandpressureThemetallogr

7、aphanalysisofthesurfaceoflayersandsectionappearancedemonstratesthatthetreatingtimeiSthecrnxfactortoformingsuccessive，welldistributedlayerswithacertaindepthIfthetimeiStooshort，thelayerwilIbethinandhaslesseffectOntheotherh