Tom qab Welding Kho Mob rau Q500Nh Weathering Hlau
Rau cov ntawv thov feem ntau, Q500nhtsis xav tau kev kho mob tom qab weld (pWHT), tab sis kev txiav txim siab tshwj xeeb siv nyob ntawm kev siv kev siv:
General Fabrication (tsis yog-tseem ceeb qauv)
Tsis muaj qhov xav tau yog tias:
Preheat (100-150 degree) tau thov kom zoo
Cov hluav taws xob qis-yog siv (piv txwv li, Aws E7018)
Vuam cua sov tawm tswv yim tau tswj (<2 kJ/mm)
Daim ntawv thov tseem ceeb (kev nyuaj siab ntau / Tsawg Kub)
Ntxhov siab kev pab tswj (xaiv tau tab sis pom zoo):
550-600℃rau 1-2 teev kom txo cov kev ntxhov siab uas muaj residual
Especially for thick sections (>25 hli) lossis kev thauj khoom zoo
Corrosion Kev Ua Haujlwm Zoo Tshaj Plaws
Lub caij nplooj zeeg PATINATORATION:
Tom qab vuam, lub tshav kub-cuam tshuam cheeb tsam (haz) loses nws cov huab cua tsis kam.
Ntuj rov hais dua tshwm sim tshaj li 6-12 lub hlis, lossis ua kom nws muaj:
Huab Cua Ntsis(piv txwv li, dilute hydrogen peroxide txau)
Cov Qub Qub(raug rau cyclic ntub / cov mob qhuav)
Thaum PWTT yog yuav tsum tau ua
Yog tias tus qauv welded yuav ua haujlwm hauv qab no-20 degree(los kho cov kev cuam tshuam nyuaj)
Rau cov hlab ntsha siab los yog cov khoom siv nkees-thauj khoom (ib qho rau xyoo 1993-1-10)
Cov Lus Taw Qhia Tseem Ceeb:
YeejTshem cov nplais pob zeb thiab huv weld aav kom tiv thaiv kev xeb corrosion.
RauCov Ntawv Thov Kev Ua Lag Luam, grind welds du kom ntseeg tau tias muaj kev sib txawv patina.
HauvMarine ib puag ncig, txiav txim siab thov cov huab cua-resistant primers ntawm weld seams.
