金屬回收機械典型零件的修復(fù)及性能改善的研究.pdf

1、F2％分類號騫卞斜技大浮V778621密級碩士學(xué)位論文金屬回收機械典型零件的修復(fù)及性能改善的研究學(xué)位申請人：學(xué)科專業(yè)：指導(dǎo)教師：孫宜華材料工程宋武林教授游敏教授論文答辯日期絲壘￡!壘12壘答辯委員會主席疊堂盞學(xué)位授予日期評閱人襁幽劍華中科技大學(xué)碩士學(xué)位論文AbstractTheenormouseconomylOSSlScausedbythefailureofthesparepartsofthemachineequipmentsevery

2、yearAmongthem，80％ofallfailureiscausedbythewearandtearAtpresent，alotofabroaduniversitiesareresearchingandteachingabouttheremanufacturingtechnologyIthascausedtheextensiveconcernthatthedisablesparepartswererepairedadoptingt

3、heAdvancedManufacturingTechnology(AMT)Theresearchoftheshieldrepairingonthemetalsrecoverymachineofthetypicalspareparts，hasnotbeenreportedyetThesurfacetreatmenttechniqueofthelasercladdingbelongstotheadvancedandnewmanufactu

4、ringtechnologyTheresearchofcladdingswear—resistantlayerson45#steelbaseplateofquenchingbyusingthelasercladdingtechnique，alsohasnotbeenreportedyetInthispaper，researchandanalysisofthefailureonthewearedshieldaredescribed，the

5、failureofshieldsiSformedfromaabrasivewearoflOWstressanddashwiththeactionoftheaerospherecorrosionatthesametimeAimingattheshieldperformanceandworkingcondition，weusedtwokindsofrepairingmethodsforthecomparativeresearchTherea

6、retheoverlayjointrepairingtechnologyandthelasercladdingrepairingtechnologyIntheresearchoftheoverlayjointrepairing，byadopting040thehandfacingelectrode，thebetterprocesshadbeenacquired——thehandfacingelectrodespreheated200。C

7、anddryingedonehourtheweldpoweradopteddirectcurrentanti—connect，theweldingelectriccurrentcontrolledaboutthescppeof200Atowavemotion，thebasematerialpreheated550℃thesurfaceoftheoverlayjointbrushedupintometalliclustrewiththes

8、teelwirebrushandthenweldedbythemethodofproperorderthenslowlycoolingandcoveredwiththeasbestostokeepheatIntheresearchofthelasercladdingrepairing，byadoptingthealloypowderWF372tomanufacturecladdinglayerthebetterprocesshadbee

9、nacquired——thethicknessofthepreplacedpowder(d)waslmm，theoutputpower(P1)was18KWthediameterofthelaserbeam(D)was4mm，theoverlappingraten)was30％，theSCanspeed(Vs)was2mm／S，argongaswasblownasashieldinggasFromthecontrastresearcho

10、fthelasercladdinglayer(WF372)andtheoverlayjointlayer(D667)，itisfoundthattheheat—affectedzeroissmallandthetransformationofsubstractisverysmallinthelasercladdinglayerThesurfaceofthelasercladdinglayerisneatandsmooth111emicr