Dab tsi yog weathering steel


Raws li peb tau hais, weathering steel kuj hu ua weathering steel. Hauv kev txiav txim siab, koj yuav pom tias cov hlau no yog lub cim lag luam ntawm United States Steel Corporation. Qhov teeb meem nrog cov ntaub ntawv hauv tsev yog tias dhau sij hawm koj feem ntau pom ib txheej ntawm xeb ua rau lawv. Tsis muaj teeb meem ntau npaum li cas koj sim txwv nws, nws yuav nkag mus. Yog vim li cas US Steel tuaj nrog lub tswv yim. Los ntawm kev muab cov khoom siv qhov muag pom, lawv yuav muaj peev xwm tiv thaiv cov plua plav tawm ntawm kev tsim. Tsis tas li ntawd xwb, nws tseem tiv thaiv cov hlau los ntawm deteriorating ntxiv. Yog li koj tsis tas yuav txhawj xeeb txog kev kos duab ib ntus.


Yog li thaum nws tag nrho cov suab zoo dhau los ua qhov tseeb, koj kuj yuav tsum muab cov khoom tso rau hauv qhov kev xav tiag tiag. Qhov no yog vim hais tias thaum xeb yuav txuas ntxiv thicken, steel yuav thicken yam tsis xav ua kom ruaj khov. Tom qab ncav cuag qhov tawg, cov hlau perforates thiab ces yuav tsum tau hloov. Yog vim li ntawd nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov qhov sib txawv ntawm ib puag ncig puag ncig thaum xaiv hom hlau no.

Cov huab cua steel ua haujlwm li cas?

Txhua lossis feem ntau cov hlau tsis tshua muaj hlau xeb vim muaj huab cua thiab noo noo. Tus nqi ntawm qhov no tshwm sim yuav nyob ntawm seb nws raug dej, oxygen thiab atmospheric pollutants uas ntaus nto. Raws li cov txheej txheem nce ntxiv, cov txheej txheej xeb tsim ib qho thaiv uas tiv thaiv cov pa phem, dej thiab oxygen los ntawm kev ntws mus. Qhov no tseem yuav pab kom ncua cov txheej txheem rusting rau qee qhov. Sij hawm dhau mus, txheej rusty no kuj sib cais los ntawm cov hlau. Raws li koj tuaj yeem nkag siab, qhov no yog lub voj voog rov ua dua.

Nyob rau hauv rooj plaub ntawm Weathering steel, txawm li cas los xij, txhua yam ua haujlwm txawv me ntsis. Thaum cov txheej txheem rusting yeej pib zoo ib yam, qhov kev nce qib yuav txawv me ntsis. Qhov no yog vim hais tias cov alloying ntsiab nyob rau hauv cov hlau tsim ib tug ruaj khov txheej ntawm xeb uas sticks rau lub hauv paus hlau. Qhov no yuav pab tsim kev tiv thaiv kev tiv thaiv kom tsis txhob nkag mus ntxiv ntawm cov dej noo, oxygen thiab cov kab mob. Raws li qhov tshwm sim, koj yuav muaj peev xwm ua rau muaj kev cuam tshuam tsawg dua li qhov feem ntau pom nrog cov qauv hlau zoo tib yam.

Metallurgy ntawm weathering steel (weathering steel)


Qhov sib txawv yooj yim koj tuaj yeem pom ntawm cov qauv zoo tib yam thiab huab cua steels yog suav nrog tooj liab, chromium thiab nickel alloy ntsiab. Qhov no yuav pab txhim kho corrosion kuj ntawm weathering steel. Ntawm qhov tod tes, thaum cov qauv hlau zoo tib yam thiab cov qauv ntawm cov huab cua steel raug muab piv, tag nrho lwm cov ntsiab lus zoo li ntau dua lossis tsawg dua.


ASTM A 242 2


Kuj tseem hu ua thawj A 242 alloy, nws muaj lub zog tawm ntawm 50 kSi (340 Mpa) thiab lub zog tensile kawg ntawm 70 kSi (480 Mpa) rau lub teeb thiab nruab nrab dov duab. Raws li rau daim hlau, lawv tuaj yeem yog peb-quarters ntawm ib nti tuab. Tsis tas li ntawd, nws muaj lub zog kawg ntawm 67 ksi, yield zog ntawm 46 ksi, thiab phaj thickness ranges ntawm 0.75 mus rau 1 nyob rau hauv.

Qhov kawg lub zog thiab tawm los lub zog ntawm cov tuab tuab dov daim hlau thiab profiles yog 63 kSi thiab 42 kSi.


Raws li rau nws cov qeb, koj tuaj yeem pom nws hauv Hom 1 thiab 2. Raws li lub npe cuam tshuam, lawv txhua tus yuav raug siv rau kev siv sib txawv, nyob ntawm lawv qhov tuab. Nyob rau hauv cov ntaub ntawv ntawm hom 1, nws yog feem ntau siv nyob rau hauv kev tsim kho, vaj tse, thiab tsheb thauj khoom. Raws li hom 2 steel, tseem hu ua Corten B, nws yog siv rau cov neeg caij tsheb cranes lossis nkoj, nrog rau cov rooj tog hauv nroog.

ASTM A 588 (Tshooj 588)


Nrog rau qhov kawg tensile lub zog ntawm 70 ksi thiab yield zog tsawg kawg yog 50 ksi, koj yuav pom no weathering hlau nyob rau hauv tag nrho cov dov duab. Nyob rau hauv cov nqe lus ntawm phaj thickness, qhov no yuav yog 4 nti tuab. Qhov kawg tensile lub zog yog tsawg kawg yog 67 kSI rau daim hlau tsawg kawg yog 4 mus rau 5 ntiv tes. Qhov kawg tensile lub zog ntawm yam tsawg kawg nkaus 63 ksi thiab tawm lub zog ntawm yam tsawg kawg nkaus 42 ksi rau 5 - 8-nti daim hlau.