1. Rau vuam kev nyuaj siab, peb yuav tsum teeb tsa lub tswvyim. Tsis muaj teeb meem dab tsi ntawm cov nqe lus siv (xws li kev siv vuam vias, kev dhau mus, tshuaj tsuag vuam, kev sib tsoo, thiab lwm yam), nws tau muab pov rau ntawm cov hlau txheej hauv qab cua sov. Tom qab ntawd, los ntawm cua kub mus rau casting thiab tom qab ntawd kom txias, qhov kev ntxhov siab yuav tsum tau tsim. Ntxiv nrog rau cov ntaub ntawv tshwj xeeb heev, kev ntxhov siab ntsws yog qhov tseem ceeb tshaj. Sib txawv vuam txheej txheem ntawm laser cladding yog txhua qhov sib txawv ntawm cov cua kub hom, nrawm, txhaws cov khoom thiab qee yam kev mob. Yog li no, los txo cov cawv ntawm qhov kev ntxhov siab no rau ntawm kev ua lej thiab cam khwb cia txheej yog qhov tseem ceeb uas yuav tsum tau txiav txim siab thaum peb ua raws li vuam zoo. Hauv kuv lub tswv yim, shrinkage kev ntxhov siab tsis tuaj yeem zam, tom qab ntawd, kev ntxhov siab tso tawm yog qhov tseem ceeb ntawm kev daws teeb meem ntawm kev ntxhov siab welding. Hauv lwm lo lus, qhov twg txoj kev ntxhov siab shrinkage tso tawm thiab yuav ua li cas faib cov kev ntxhov siab los ntawm qhov sib npaug rau qhov chaw casting yog cov teeb meem uas peb xav tau thiab tuaj yeem daws.
2. Vim li cas vim li cas deformation ntawm laser cladding yog qhov me me yog tias qhov chaw casting yog me me, qhov chaw hloov chaw yog qhov me me, thiab qhov ntsws me me.
Tom qab ntawd lub zog shrinkage tsim los ntawm cov khoom siv hauv cov txheej txheem shrinkage tsis txaus kom deform tag nrho lub cev, uas yog vim li cas vim li cas laser cladding tsis deform (yog li deformation yuav tshwm sim thaum lub cev loj dua), uas kuj yog zoo dua ntawm laser cladding. Yog li, vuam kev ntxhov siab nyob qhov twg? Nws yog tsuas yog tso tawm rau hauv cheeb tsam casting thiab hloov chaw. Tom qab ntawd, ob qho teeb meem tshwm sim
Ib qho yog cov khoom tawg yooj yim tshwm sim rau thaj chaw casting, yog li ntawd cov ductility ntawm cov khoom yuav tsum tau los ntawm laser cladding, xws li nickel raws li hmoov;
Thib ob, qhov kev ntxhov siab nyob hauv thaj tsam kev hloov pauv yog loj. Vim tias qhov nrawm nrawm thiab cua txias hauv cov txheej txheem laser cladding, qhov loj me ntawm thaj tsam hloov pauv tau tsawg dhau, ua rau muaj kev ntxhov siab nyob hauv thaj av no, uas cuam tshuam rau kev sib koom ua ke ntawm laser cladding. Tshwj xeeb tshaj yog thaum muaj cov tshuab hloov ntawm lub zog ntawm cov xaim thiab cov khoom siv vuam sib txawv sib txawv, tus nyiam yog qhov hnyav dua, thiab txawm tias qhov tshwm sim ntawm poob tawm kuj tshwm sim. Yog li ntawd, yuav tsum tau them nyiaj tshwj xeeb rau cov khoom siv thiab tuab qauv ntawm cov txheej txheem kev hloov pauv ntawm laser cladding.
3. Muaj peb lub laj thawj vim li cas ntshav plasma laser cladding tsis yooj yim los ua cov kab nrib pleev, pores thiab lwm yam tsis xws luag
Ua ntej, plasma ua cov cua sov rau cov ntaub ntawv (surfacing) thiab submerged arc gas shielded vuam thiab lwm qhov kub ntau dua, concentrated ion arc stability yog qhov zoo dua, tsis muaj electrode melting poob, cov zis tshav kub yog uniform, yooj yim los tswj, yog li cov cua sov faib rau hauv qhov chaw casting yog xim zoo ib yam, cov khoom siv fusion yog tag nrho cov yam ntxwv, cov pa tso tawm ntawm cov pa ya tsis txaus yog qhov txaus, thiab kev faib tawm kev ntxhov siab faib yog yam tsis zoo.
Thib ob, vim tias qhov siab tswj qhov ntsuas qhov tseeb ntawm cov khoom siv ntshav, qhov kev tswj ntawm cheeb tsam casting thiab kev hloov chaw yooj yim, thiab kev sib txawv yog qhov zoo, thiab kev ntxhov siab faib tau yooj yim los tswj thiab tsim nyog.
Thib peb, argon tiv thaiv tsis xav tau ntau yam tshuaj ntxiv, thiab tsis muaj teeb meem hydrogen thiab oxidation. Yog li ntawd, plasma cladding (surfacing) zoo dua rau thaj chaw loj, tuab tuab, zoo tawv tawv casting (xws li siab manganese, siab chromium ceramic cov ntaub ntawv, thiab lwm yam), thiab nws tsim nyog rau kev tsim hnav-resistant paib, li qub, cov cav ntim , thiab lwm yam.
Hais txog laser cladding thiab ntshav cladding, ntau cov npoj yaig tau tshaj tawm ntau cov lus, feem ntau lawv hais txog qhov zoo ntawm laser, uas tseem yog lub hom phiaj uas peb tab tom nrhiav. Txawm li cas los xij, feem ntau ntawm lawv raug ntsuas los ntawm kev soj ntsuam nws yog nqus.
Tab sis txhua yam muaj nws ob sab, laser cladding kuj muaj nws qhov tsis zoo. Hais txog kev siv thev naus laus zis, muaj ntau qhov kev txwv, hauv qhov kev tsim tawm tiag tiag xav tau ntau dua kev ua haujlwm siab, ua rau muaj kev nyuaj rau cov neeg siv khoom ntau. Hauv kuv lub tswv yim, qhov laj thawj tseem ceeb yog tias lub sijhawm melting ntawm cladding txheej tshwm sim los ntawm cov cua kub ceev thiab cua txias yog luv heev, uas ua rau muaj qhov sib txawv loj ntawm sab nraud thiab sab hauv ntawm qhov chaw, tsim cov qauv tsis ncaj, tsis txaus siab kev faib tawm, tsis txaus siv hluav taws xob, tsis txaus qhov nyuaj, tsim tau yooj yim ntawm qhov hws thiab slag suav nrog, thiab lwm yam, uas ua rau nws nyuaj kom tau txais txheej txheej txig nrog cov chaw loj, tshwj xeeb tshaj yog YAG laser. Yog li no, kev xaiv cov khoom siv thiab kev ua haujlwm ntawm laser cladding yuav tsum tau ua tshwj xeeb. Piv nrog laser cladding, ntshav plad cladding muaj ntau cov kev nkag los ntawm tshav kub thiab loj dua kev deformation dua li laser. Txawm li cas los xij, nws muaj qhov zoo ntawm tag nrho melting, teeb hardness faib, tiav ua tiav dross, xaiv ntau ntawm cov ntaub ntawv, kev lag luam yooj yim, yooj yim kom tau txais qhov zoo tag nrho cladding txheej, tsis tshua muaj nqi thiab txiaj ntsig zoo. Yog li ntawd, nws muaj cuab kev zoo nyob rau thaj tsam loj thiab cov tuab tuab cladding.
