非真空熔結含碲鎳基合金粉末覆層工藝研究.pdf

1、蘭州理工大學碩士學位論文非真空熔結含碲鎳基合金粉末覆層工藝研究姓名：王占華申請學位級別：碩士專業(yè)：材料加工工程指導教師：蘇義祥201206非真空熔結含碲鎳基合金粉末覆層工藝研究AbstractByusingthelasercladdingtechnologyonthedamageablepartsofthemachinepartsformingwearresistingandcorrosionresistantlayer，whichca

2、llbegreatlyextendtheservicelifeofequipmentandimprovetheproductionefficiencyEspeciallyitCanovercometheproblemoftheworkpiecedeformationandcombinedwithlowstrength，existinginthesurfacingweldingandthermalsprayingandubiquityin

3、thetraditionalsurfacetreatmenttechnology，itwithgreatdevelopmentpotentialButthequalityproblemofthenickelbasedalloylasercladdinglayerisstillanimportantfactorrestrictthetechnologytotheindustrialapplicationPlus，becauseofhigh

4、energybeamcladdingequipmentpriceishighermakeitsapplicationanddisseminationaredifficultTherefore，wefurtherresearchtheantivacuumfusionsinteringtechnologywhichequipmentrequirementissimpleandcostoflowAccordingtoappearanceoft

5、heabove，thissubjectexploreadoptingtheantivacuumfusionsinteringtechnology，preparationnickel—basedcoatingwithadditionoftelluriumelementThatisaddingtraceamountsoftelluriumelementsinnickelbasedalloypowderNickel—basedcladding

6、ispreparedonthe45群steelsubstratewithadditionoftelluriumelement，bymeansoflayingalloypowderdirectlyandaddingbinderPutthepreparedsampleintheantivacuumboxresistancefurnace，heatingupto950“C，1000。C，1050“C，1100。C，heatpreservati

7、on30minutestomakenickelbasedalloypowderwithadditionoftelluriumelementmeltingClosetheanti—vacuumboxresistancefurnaceSampleswerecooledinthefurnacetoroomtemperature，takingoutobservationByusingscanningelectronmicroscope，Xray

8、diffractionandelectronprobe，micro—hardnesstesting，frictionandwearresistancetest，hightemperatureoxidationperformanceanalysis，corrosionresistanceandcorrosionbehavioranalysis，andothermeansToresearchthemicrostructureofstruct

9、ureandmechanicalpropertiesofthenickelbasedalloycladdingwithadditionoftelluriumelementTheresultsshowthat：Antivacuumfusionsinteringnickelbasedalloypowderwithadditionoftelluriumelementat1050。C，thepreparationofthenickel—base

10、dalloycoatingwithadditionoftelluriumelementwith45#steelsubstratemetallurgycombininggoodThealloycoatingwithfinemicrostructurewasdense，uniform，andtherewasnoflawTheprotrudingblackgrayboneshapeorganizationwasdistributedevenl