PVD Txheej - Npaj Qhia
Jan 05, 2018| Kev xav
Kev npaj ntawm lub substrate rau PVD ua ntej PVD txheej yog ib qho tseem ceeb rau kev ua tiav zaum kawg ntawm cov khoom nyob hauv thaj av. Kev txhim kho polishing, kev sib tsoo lossis kev txuag tuaj yeem ua rau neeg pluag adhesion los yog tsis ua haujlwm ntxov. Thaum npaj lub substrate rau PVD txheej muaj ib co kev xav txog kev xav kom nco ntsoov:
1. Txhua qhov chaw yuav tsum tau roj khov nrog cov dej-soluble roj. Qhov no tiv thaiv rusting thiab yuav pov hwm lub sam xeeb txog ntawm qhov chaw. Xaiv cov roj uas tsis qhuav los yog tawm ntawm qhov seem ntawm qhov khoom ntawm qhov khoom. Qee cov roj yog tsim los rau lub tsho loj thiab tawm hauv ib txheej pov npoo rau ntawm qhov chaw. Cov txheej txheem no tuaj yeem nyob tom qab tu cov khoom thiab ua rau neeg pluag adhesion.
2. Tsis muaj cov kev kho hniav ua ntej yuav tsum tau siv rau cov nplais ntawm cov khoom ua ntej PVD txheej. Kev ntub dej da dej plating, oxide oxide thiab nitriding yog cov qauv kev kho deg uas ua rau teeb meem adhesion nrog cov PVD coatings.
3. Yuav tsum tau ua cov txuj ci kom zoo nkauj thaum npaj cov nplaim rau PVD txheej. Kev sib txuas lus sib txuas ua ke uas muaj silicone yuav tsum tsis txhob siv thaum npaj cov nplaim rau PVD txheej. Thaum siv cov xim siv silicone uas siv polishing, qhov seem ntawm silicone yog nyob rau ntawm qhov chaw thiab yuav ua rau muaj teeb meem adhesion.
4. Kev tu mob yuav tsum tau muab rau thaum cov nplawm tawg ntawm lub substrate. Cov iav hlaws yuav tsum raug zam thaum tsim nyog. Yog hais tias iav hlaws daig yog siv lub tshuab no tsis pub tshaj 30 psi.
5. Thaum sib tsoo ntawm qhov kev tu plaub yuav tsum tau noj kom tsis txhob ua kom kub ntau. Yog tias ntev li ntawm tshav kub yog tsim los ntawm kev sib tsoo nws tuaj yeem ua rau muaj kev ntxhov siab ntxhov siab nyob rau hauv lub substrate lub nto los yog lub cev ntas tawm ntawm cov pob zeb muag. Thaum tshav kub kub ntau yog tsim thaum lub sib tsoo kub ceev, tus substrate tuaj yeem ua tau los yog qhov sib tsoo qhov muag uas tawm hauv qhov chaw tuaj yeem ua rau muaj teeb meem kev nplaum.
6. Tag nrho cov burrs yuav tsum tau muab tshem tawm ua ntej cov khoom raug kaw. Ib qho burr uas tau sab laug ntawm qhov chaw yuav tsum tau coated thiab thaum nws raug tshem tawm hauv lub tshav puam yuav tawm hauv qhov voos hauv qhov txheej txheem uas ua rau lub sijhawm tsis ua haujlwm ntxov.
7. Cov khoom yuav tsum tau kub-kho yam tsawg 50 degrees Fahrenheit siab tshaj qhov ua haujlwm PVD. NCT muaj kub thiab kub txheej txheej kom haum rau ntau yam kev nqhis dej.
8. Cov khoom siv uas yog sib txuas los ntawm kev txhim kho yuav tsum tau koom nrog lub siab kub brazing compound. Lub compound yuav tsum yog dawb ntawm cadmium thiab zinc. Lub cadmium thiab zinc yuav pib ua kom qhuav ntawm qhov kub tsawg tsawg thaum lub sijhawm txheej txheem. Qhov no tuaj yeem ua rau voids nyob hauv cov pob txha brazed thiab, qee lub caij, ua rau neeg pluag adhesion ntawm lub txheej. Hu rau NCT yog tias koj xav tau kev pom zoo rau ib qho chaw ua ke.
9. Kev ncaj ncees ntawm sab nraud tseem ceeb heev rau cov khoom ua tiav. Yog tias lub carbide substrate cov kev cob qhia ncaus thaum lub sij hawm npaj cov kauj ruam lub txheej yuav tsis ua raws li qhov yuav tsum tau ua. Yog tias cov dej nyob hauv cov dej txias, cov leaching ntawm lub khob cij yuav ua tau. Ntau yam tseem ceeb tuaj yeem ua rau lub leaching ntawm cobalt los ntawm carbide substrate. Cov tshuaj chlorine nyob hauv dej, p phuab dej ntawm cov dej, xeb cov tshuaj tsis haum ntxiv rau qhov txias thiab txawm tias cov dej purity yog tsis saib xyuas tau leach tus ciaj ntawm cobalt. Lub ntsuas sov ntawm qhov txias kuj tuaj yeem ua si. Raws li qhov kub ntawm qhov cua txias nce, qhov kev ua si ntawm cov cobalt cobalt nce. Kev tuav cov khoom zoo yog qhov tseem ceeb heev. Qhov uas yuav tsum tau sib tsoo ntau txoj haujlwm yuav tsum tau muab ntxuav los ntawm txhua qhov chaw txias rau ntawm txhua theem.
