强流脉冲电子束强化齿轮弯曲疲劳性能的的分析

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1、·AbstractAbstractThesituationofforceisverycomplicatedwhengearworks,sokindsoffailures usuallyappear,suchaspitting,peeling,gluing,excessivewearandbendingfatigue fracture，whilethebendingfatiguefractureaccountsforalargeproportionofallfailures. Withthedevelopmentofmodernind

2、ustry，thegearsthatwithlightweightbuthigh strengtharerequired.Internationalstudyonthestrengthofgeararemainlyinaspectsof optimizationoftoothshapeandsurfacetreatmentongear,undercertainconditions,while theroleofincreasingthebendingfatiguestrengthoftoothislimitedthroughthe

3、optimizationoftoothshape,andtraditionalsurfacetreatmenttechnologiesalsofacesome limitations,soitmakesgreatimportancetostudythenewsurfacetreatmenttechnologies thatareapplicableongears.High-currentpulsedelectronbeam(HCPEB)isanewandefficientsurface modificationtechnique.W

4、ithitshighenergydensityandhighefficiency,changesofthe surfacestructureareinducedandthepropertiesofthesurfacelayerofmaterialscanbe improveddirectlyandeffectively.Thisarticleoriginatesfromapartoftheprojectof NationalNaturalScienceFoundationofChina,“thestudyonprocessandpr

5、opertyof surfaceamorphizedgears”(No.50775229).Thegrindedandnon-grindedoriginalgearsare irradiatedbyHCPEB,andtestofbendingfatiguestrengthoftheoriginalgearsand irradiatedgearsiscarriedoutonhigh-frequencyfatiguetester.Thestudyonaffectof HCPEBtobendingfatigueofgearswithdif

6、ferentsurfaceconditionsisdoneinorderto obtainthegearwithlongerlife.Majorworksofthepaperareasfollow:(1)Summaryofthemainfactorsthatinfluencethebendingfatiguestrengthofgear. (2)Thethermal-mechanicalcouplingmethodinfiniteelementanalysissoftware ANSYSisusedtoanalyzethetempe

7、ratureandthermalstressdistributionin40Crsteel irradiatedbyHCPEB.Theresidualstressofthesurfaceafterrepeatedlyirradiationis given.(3)Thegrindedandnon-grindedgearsthatwithtwokindsofsurfaceconditionare treateddirectlybyHCPEBofwhichtheparametersareoptimized.(4)Thetestofbend

8、ingfatiguestrengthofgearsiscarriedoutonallgearsunderthe conditionofconstantamplitudeloadandthebendingfatiguestrengtho