Puas yuav corten steel muaj teeb meem ntawm embrittlement nyob rau hauv sub-zero low-kub ib puag ncig?

Dec 04, 2025 Tso lus

Corten hlaumuaj kev pheej hmoo tsawg ntawm embrittlement nyob rau hauv dav sub-zero low- qhov kub thiab txias, tab sis nws qhov kev ua tau zoo muaj feem xyuam rau qib tshwj xeeb ntawm Corten steel, kev tsim qauv, thiab lub xeev kev ntxhov siab.

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Kev ua tau zoo ntawm Corten steel ntawm qhov kub thiab txias Corten steel feem ntau muab faib ua ob qib:Corten AthiabCorten B(nrog rau Corten weathering steel rau lub hom phiaj tshwj xeeb). Lawv cov matrix yog tsawg- alloy steel, thiab ntxiv alloy cov ntsiab lus (tooj liab, phosphorus, chromium, npib tsib xee, thiab lwm yam) tsis tsuas yog txhim kho corrosion kuj tab sis kuj txhim kho qis - kub toughness rau ib yam twg.

Rau feem ntau sub- xoom ib puag ncig (xws li -10℃txog -30 degree), qhov cuam tshuam ntawm Corten steel tseem tuaj yeem ua tau raws li cov kev cai ntawm kev siv sab nraum zoov, thiab yuav tsis muaj qhov pom tseeb embrittlement (dab tsi nkig tawg tsis muaj yas deformation).

Lub ductile -kho hloov pauv kub (DBTT) ntawm tus qauv Corten steel feem ntau qis dua -20℃(Corten B txawm qis dua, nyob ib ncig ntawm -40 degree), uas txhais tau hais tias thaum lub ambient kub siab tshaj tus nqi no, cov hlau tseem nyob rau hauv ib tug ductile lub xeev thiab yog tsis muaj nkig tsis ua hauj lwm.

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Cov xwm txheej uas embrittlement txaus ntshai yuav nce

Ultra- qhov kub thiab txias (hauv qab -40 degree): Thaum qhov kub thiab txias yog qis dua cov kab hluav taws xob- qhov hloov pauv kub ntawm Corten steel, nws qhov cuam tshuam qhov hnyav yuav poob qis, thiab embrittlement yuav tshwm sim nyob rau hauv kev cuam tshuam sab nraud lossis kev ntxhov siab loj (xws li cua load, daus load, lossis cov qauv kev co).

Kev ntxhov siab siab thiab kev ua haujlwm tsis zoo: Yog tias Corten steel tivthaiv muaj qhov tsis xws luag (piv txwv li, weld tawg, tsis tiav kev nkag), cov kaum ntse ntse, lossis cov kev ntxhov siab sab hauv lub sijhawm ua haujlwm thiab kev teeb tsa, kev ntxhov siab yuav tshwm sim ntawm cov haujlwm no hauv qhov qis - qhov kub thiab txias, uas yuav ua rau tawg tawg txawm tias tag nrho qhov kub siab tshaj DBTT.

Ntev - lub sij hawm corrosion los yog khoom aging: Txawm hais tias kev tiv thaiv xeb txheej ntawm Corten hlau tuaj yeem tiv thaiv kev sib sib zog nqus corrosion, yog tias lub zos pitting corrosion los yog xeb txheej txheej tshwm sim rau lub sijhawm ntev, qhov zoo ntawm cov hlau yuav raug txo, thiab qhov kev ntxhov siab ntawm qhov corrosion yuav ua rau muaj kev pheej hmoo ntawm qhov kub tsawg.

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Kev ntsuas kom tsis txhob qis -kub embrittlement

Xaiv cov qib uas tsim nyog: Rau tej yaam num hauv cheeb tsam txias heev (piv txwv li, thaj chaw uas muaj qhov kub thiab txias hauv qab -30 degree), xaivCorten Blos yog qis-kub- tiv taus huab cua cov qib steel tsis zoo li Corten A, vim lawv muaj qhov zoo dua qis- qhov kub thiab txias.

Optimize tus qauv tsim: Zam kom tsis txhob muaj cov ces kaum ntse thiab cov kev hloov pauv sai sai hauv ntu hauv cov qauv tsim kom txo qis kev ntxhov siab; xyuas kom cov vuam zoo (tsim qis- cov txheej txheem vuam kub thiab cov khoom siv) thiab ua tom qab-weld stress relief kho kom tshem tawm cov kev ntxhov siab seem.

Txhim khu kev tiv thaiv corrosion: Ua kom muaj kev ncaj ncees ntawm cov txheej txheem tiv thaiv xeb, thiab kho cov txheej txheem xeb hauv zos kom raug raws sijhawm kom tsis txhob muaj xeb- cuam tshuam cov yam ntxwv tsis xws luag.

Txwv kev thauj khoom sab nraud: Rau cov qauv sab nraum zoov xws li pergolas thiab cov paib nyob rau hauv qis- thaj chaw kub, tsim kom muaj kev thauj khoom tsim nyog- muaj peev xwm ua kom tsis txhob muaj huab cua ntau dhau (piv txwv li, daus hnyav, cua daj cua dub).