1.Vim li cas cov zinc txheej yuav tsum tau muab tshem tawm tag?
Lub hom phiaj tseem ceeb ntawm sandblasting yog tshem tawm cov txheej galvanized, npaj cov vuam rau vuam. Kev vam meej ncaj welding nyob ntawm qhov ua tau zoo ntawm cov xuab zeb blasting.
Sandblasting yuav tsum tau ua tib zoo: Tom qab sandblasting, nws yog ib qho tseem ceeb kom ntseeg tau tias zinc txheej nyob rau hauv thiab ib ncig ntawm lub weld cheeb tsam (xws li lub nraub qaum ntawm weld thiab bevel) raug tshem tawm tag nrho, exposing lub ntuj hlau (nyiaj -dawb steel substrate). Txhua qhov seem zinc yuav ua rau muaj teeb meem thaum vuam.
Kev soj ntsuam txoj kev: Pom pom qhov chaw vuam. Yuav tsum tsis muaj cov nyiaj ci ci lossis zinc- cov kab txaij ntawm galvanized txheej; thaj chaw weld yuav tsum nthuav tawm cov ntshiab grey-dawb xim hlau luster ntawm hlau.
2.Dab tsi yog qhov txaus ntshai ntawm vuam zinc plating?
Porosity:
Zinc muaj qhov kub kub ntawm kwv yees li 906 degree, thaum hlau muaj qhov melting point ntawm kwv yees li 1500 degree.
Nyob rau hauv lub siab kub ntawm ib tug hluav taws xob arc, zinc sai evaporates rau hauv zinc vapor. Yog tias qhov vapor no tsis tuaj yeem khiav tawm ntawm lub pas dej molten nyob rau lub sijhawm, nws yuav raug kaw hauv cov hlau vuam thaum lub sij hawm solidification, tsim ntau lub qhov hws uas ua rau cov weld lub zog thiab ntom ntom.
Vuam Cracks (Zinc Embrittlement):
Molten zinc nkag mus raws li cov ciam teb ntawm cov hlau, ua rau txo qis hauv kev sib koom ua ke thiab ua rau cov weld muaj kev cuam tshuam rau kev tawg hauv kev ntxhov siab. Qhov no yog qhov ua rau tuag taus rau cov qauv welded.
Toxic Welding Fumes:
evaporated zinc reacts nrog oxygen nyob rau hauv cov huab cua los tsim zinc oxide pa.
Kev nqus cov pa no tuaj yeem ua rau "hlau fume fever," nrog rau cov tsos mob xws li ua npaws, ua daus no, xeev siab, thiab mob taub hau, ua rau muaj kev phom sij loj rau cov neeg hlau.
Weld tsis zoo:
Zinc vapor cuam tshuam nrog kev ruaj ntseg ntawm cov hluav taws xob arc thiab tuaj yeem tsim vuam spatter, uas ua rau tsis zoo weld formations thiab tsis zoo fusion.
3.Dab tsi yog qhov zoo ntawm vuam ncaj qha tom qab sandblasting?
Tshem tawm ib kauj ruam: Yog hais tias sandblasting yog ib qho tsim nyog cov kauj ruam nyob rau hauv lub workpiece nto kho (xws li npaj rau tom ntej painting), nws ib txhij tshem tawm cov zinc txheej, tshem tawm qhov xav tau kev sib tsoo.
Kev kho qhov loj thiab tsis sib xws: Rau qhov chaw loj welded, sandblasting yog qhov ua tau zoo dua thiab ua kom zoo dua qub dua li lub kaum sab xis sib tsoo.
4.Dab tsi yog qhov tsis zoo ntawm vuam ncaj qha tom qab sandblasting?
Kev tshem tawm kom tiav yog qhov nyuaj rau lav: tshwj xeeb tshaj yog nyob rau hauv cov duab nyuaj, cov ces kaum, crevices, los yog cov npoo ntawm cov ntawv hlau, sandblasting yuav tsis tag tshem tawm cov zinc txheej. Cov zinc residual tuaj yeem ua rau cov teeb meem zoo li no.
Kev sib kis thib ob: Yog tias cov khoom ua haujlwm tsis raug muab tso rau tom qab sandblasting los yog nyob rau hauv ib puag ncig muaj plua plav, zinc - muaj plua plav tuaj yeem nyob ntawm qhov chaw. Cov plua plav no kuj tuaj yeem ua teeb meem thaum vuam.
Lub sijhawm ua haujlwm siab: Cov hlau tshiab substrate raug tawm tom qab sandblasting yog nquag oxidation sai thiab xeb hauv huab cua. Yog li ntawd, vuam yuav tsum tau ua sai li sai tau tom qab sandblasting; txwv tsis pub, nyias xeb txheej uas cov ntaub ntawv kuj yuav cuam tshuam cov weld zoo.
5.Qhov txheej txheem kev khiav haujlwm yog dab tsi?
Txhuas Sandblasting:
Siv cov abrasive tsim nyog (xws li steel grit, xim av corundum, thiab lwm yam) los xyuas kom meej tshem tawm cov zinc txheej los ntawm weld bevel thiab tsawg kawg yog 20-30mm ntawm ob sab, kom txog rau thaum cov hlau raug.
Rau pob tw welds, sab nraub qaum kuj yuav tsum tau kho tib yam.
Kev soj ntsuam nruj:
Ua ntej vuam, ua tib zoo tshuaj xyuas thaj tsam sandblasted kom tsis txhob muaj zinc txheej. Qhov no tuaj yeem ua tau los ntawm kev ci lub teeb muaj zog ntawm qhov chaw thiab saib los ntawm ntau lub kaum ntse ntse.
Kev Tu Nto:
Tom qab sandblasting, siv cov huab cua huv huv los tshuab cov hmoov av abrasive thiab residue ntawm qhov chaw. So nrog roj - daim ntaub dawb yog tias tsim nyog.
Tam sim no Vuam:
Ua kom tiav cov haujlwm vuam ua ntej qhov chaw re-oxidizes.
Txhim khu kev tiv thaiv vuam:
Qhov cua: Txawm tias tom qab cov zinc txheej tau raug tshem tawm lawm, cov pa hauv zos muaj zog lossis qhov cua dav dav yuav tsum tau khaws cia thaum lub sij hawm vuam raws li kev ceev faj kom tshem tawm cov kab ntau ntawm zinc vapor lossis lwm cov pa taws uas tuaj yeem tsim tawm.
Cov Khoom Siv Tiv Thaiv Tus Kheej: Cov vuam yuav tsum hnav lub tshuab ua pa uas tsim nyog rau kev tiv thaiv cov pa hluav taws xob (xws li P100 qib plua plav qhov ncauj qhov ntswg) thiab cov khaub ncaws tiv thaiv vuam txheej txheem.
Welding txheej txheem xaiv:
Txo cov cua sov tawm me ntsis tuaj yeem pab txo cov zinc vapor tiam (txawm tias cov zinc txheej tau raug tshem tawm, nws tseem pom zoo kom ua li ntawd).
Siv lub arc luv ua kom muaj pa tawm.