Thaum qhia txog S355W Corten Steel rau European lossis thoob ntiaj teb cov haujlwm, nkag siab txog nws cov tshuaj muaj pes tsawg leeg uas yuav tsum tau ua raws li EN 10025-5 (tus qauv European rau huab cua- tiv thaiv cov qauv hlau) tsis yog -kev sib tham-cov ntsiab lus ncaj qha txhais nws cov huab cua tsis kam thiab kev ntseeg siab ntawm txhua yam. Dab tsi yog qhov tseem ceeb ntawm kev txwv rau S355W, thiab vim li cas lawv tseem ceeb? Hauv qab no yog cov ntsiab lus, kev ua tiav ntawm nws cov kev xav tau tshuaj lom neeg tseem ceeb thiab lub luag haujlwm tseem ceeb ntawm txhua lub ntsiab lus tseem ceeb.
1. Cov ntsiab lus tseem ceeb ntawm cov tshuaj lom neeg (EN 10025-5)
EN 10025-5 teeb tsa cov kev txwv nruj rau S355W cov tshuaj lom neeg muaj pes tsawg leeg, nrog rau huab cua tiv taus cov ntsiab lus raws li qhov tseem ceeb. Ntawm no yog cov kev cai tseem ceeb (feem ntau, max / min):
Cov pa roj carbon (C): Tsawg dua lossis sib npaug li 0.18%. Cov ntsiab lus tsis tshua muaj carbon tsawg ua kom cov weldability zoo heev thiab tsis txhob cuam tshuam cov hlau qhov tawv nqaij - qhov tseem ceeb rau kev siv cov qauv uas yuav tsum tau muaj rau ntawm - qhov chaw tsim khoom.
Manganese (Mn): Tsawg dua lossis sib npaug li 1.60%. Txhim kho cov hlau lub zog thiab ductility yam tsis muaj undermining nws cov huab cua tsis kam, ntsuas txhua yam kev ua tau zoo thiab kev ua haujlwm.
Silicon (Si): Tsawg dua lossis sib npaug li 0.70%. Ua raws li deoxidizer thaum lub sijhawm tsim khoom thiab ua rau muaj kev ruaj ntseg ntawm cov txheej tiv thaiv xeb, txhawb nqa ntev - lub sij hawm corrosion kuj.
Phosphorus (P): 0.070-0.120%. A foundational weather-resistant element-promotes the formation of a dense, adherent rust layer that blocks the penetration of moisture and corrosive media.
Sulfur (S): Tsawg dua lossis sib npaug li 0.035%. Kev tswj nruj nruj kom tsis txhob muaj qhov tsis xws luag sab hauv (piv txwv li, voids, inclusions) uas yuav ua rau cov hlau tsis muaj zog thiab tiv thaiv corrosion.
Copper (Cu): Ntau dua lossis sib npaug li 0.20%. Cov huab cua tseem ceeb -cov khoom tiv taus- ua haujlwm sib koom ua ke nrog phosphorus kom ruaj khov txheej txheej xeb, ua kom muaj zog tiv thaiv atmospheric corrosion.
Chromium (Cr): 0.30-1.20%. Txhim kho cov xeb txheej compactness thiab stability, tshwj xeeb tshaj yog nyob rau hauv hnyav ib puag ncig zoo li cov ntug dej hiav txwv ntsev tsuag zones los yog high-SO₂ industrial cheeb tsam.
Nickel (Ni): Tsawg dua lossis sib npaug li 0.65%. Ib qho kev xaiv uas, thaum ntxiv, ntxiv txhim kho qis -kub toughness thiab xeb txheej durability- zoo rau kev siv txias - cheeb tsam.
2. Lub luag haujlwm tseem ceeb ntawm huab cua-Cov ntsiab lus tsis kam
Kev sib koom ua ke ntawm Cu, P, thiab Cr yog "qaum" ntawm S355W huab cua tsis kam, raws li tau hais los ntawm EN 10025-5:
Cov ntsiab lus no cuam tshuam los ua ib qho ntom ntom, ruaj khov -FeOOH xeb txheej ntawm cov hlau nto. Tsis zoo li cov xoob, flaky xeb ntawm cov pa roj carbon zoo tib yam, txheej txheej no ua kom nruj rau hauv cov substrate, tsim kom muaj kev tiv thaiv ntuj tsim tawm tsam corrosive yam (nqus, oxygen, Cl⁻, SO₂²⁻).
Cov kev txwv nruj nruj (piv txwv li, qis C, tswj S) xyuas kom S355W tuav ob qho tib si huab cua tsis kam thiab kev ua haujlwm (vuam, dabtsi yog khoov, dov)- tseem ceeb rau nws siv hauv kev thauj khoom-cov qauv kev siv xws li txuas hniav, cov ncej, thiab chaw nres nkoj.
3. Cov lus qhia tswv yim rau kev txheeb xyuas & kev yuav khoom
Kev Tshawb Fawb Kev Ua Raws Cai: Thaum muab S355W, thov Mill Test Reports (MTRs) los ntawm cov neeg muag khoom uas qhia meej txog cov tshuaj muaj pes tsawg leeg thiab paub meej tias ua raws li EN 10025-5. Xyuas kom lub MTR suav nrog tus lej qauv, tus lej xov tooj cua sov, thiab cov ntawv zeb ua haujlwm rau kev taug qab.
Ib puag ncig-Txoj Kev Xaiv Hloov: Rau qhov hnyav ntawm ntug dej hiav txwv lossis thaj chaw muaj kev lag luam, paub meej tias cov khoom siv S355W muaj Cu thiab Cr cov ntsiab lus nyob rau sab sauv kawg ntawm tus qauv ntau kom ua kom muaj kev tiv thaiv corrosion.
Zam kev tsis meej pem qib: Tsis txhob ua rau S355W tsis meej nrog- huab cua- qib tiv taus (piv txwv li, S355JR) lossis lwm yam huab cua- tiv taus ntau yam (piv txwv li, S355J0W nrog rau qhov tshwj xeeb qis- qhov yuav tsum tau muaj qhov kub thiab txias). Ib txwm txheeb xyuas qhov "W" cov lus xaus ( huab cua tsis kam) thiab EN 10025-5 ua raws li cov ntaub ntawv yuav khoom.
Hauv cov ntsiab lus, S355W Corten Steel cov tshuaj muaj pes tsawg leeg raws li EN 10025-5 chaw ntawm Cu, P, thiab Cr raws li cov ntsiab lus tseem ceeb ntawm huab cua-resistant, nrog rau kev tswj nruj ntawm C, S, thiab lwm yam khoom kom sib npaug kev ua tau zoo thiab kev ua tiav. Kev txheeb xyuas qhov ua tau zoo ntawm MTRs ua kom cov khoom ua tau raws li qhov project huab cua tiv thaiv thiab cov qauv kev nyab xeeb.
