Taw qhia rau qib stainless hlau - kev ua tau zoo thiab cov yam ntxwv ntawm 253MA
253MA yog cov qib kub-resistant austenitic stainless hlau nrog cov yam ntxwv kub kub zoo thiab kev ua haujlwm zoo. Nws qhov kub siab oxidation kuj tuaj yeem ncav cuag 1150 degree, thiab nws qhov kev ua tau zoo dua li ntawm 310 stainless hlau hauv cov cua uas muaj carbon, nitrogen thiab sulfur.
253MA yog lub cim lag luam ntawm Outokumpu Stainless Steel Company. Nyob rau hauv tus qauv qib nomenclature, nws yog UNS S30815. Lwm cov steel mills kuj tsim cov qib uas ua raws li UNS S30815, suav nrog Sirius S15.
Cov ntsiab lus tsis tshua muaj npib tsib xee ntawm 253MA muab qee qhov zoo dua li cov nickel alloys siab thiab 310 stainless hlau hauv kev txo cov sulfide ib puag ncig. Cov ntsiab lus siab ntawm chromium, silicon, nitrogen thiab cerium muab cov hlau zoo oxide stability, siab kub (ceep) lub zog thiab zoo heev tsis kam mus rau σ theem nag lossis daus.
Cov qauv austenitic muab nws zoo heev toughness, txawm nyob rau hauv lub freezing kub.
Corrosion kuj
Txawm hais tias qib no tsis yog tsim los tiv thaiv corrosion los ntawm aqueous cov ntsiab lus, nws cov ntsiab lus chromium thiab nitrogen ntau dua ua rau nws zoo ib yam pitting corrosion kuj zoo li 316 stainless hlau. 253MA muaj cov ntsiab lus carbon siab, yog li nws yooj yim rau rhiab heev. Tom qab qhov kub thiab txias siv los yog ua tiav, qhov kev tiv thaiv corrosion ntawm aqueous tov media yuav raug txo.
Thaum tshav kub kub kuj
Antioxidation: Nws muaj cov txiaj ntsig zoo antioxidant thiab tuaj yeem ncav cuag qhov kub thiab txias li 1100 degree. Ntawm qhov kub thiab txias, nyias thiab elastic oxide nrog lub zog adhesion yuav raug tsim sai, uas muaj kev tiv thaiv zoo ntawm cov hlau, txawm tias nyob rau hauv cov xwm txheej ntawm qhov kub thiab txias hloov, uas zoo dua li 310 stainless hlau. Kev ua haujlwm antioxidant yog qhov zoo tshaj plaws nyob rau hauv cov xwm txheej uas tsis yog-cyclic hloov hauv qhov kub thiab txias.
Tsis kam rau carburization: ua tau zoo nyob rau hauv oxidizing tej yam kev mob. Yog tias cov xwm txheej txo qis, yuav tsum tau siv qib nrog cov ntsiab lus nickel ntau dua.
Anti-sulfurization: Hauv qhov chaw oxidizing (txawm tias tsuas muaj cov pa oxygen xwb), nws muaj kev tiv thaiv zoo rau cov roj sulfur. Txo cov roj cua tiv thaiv kev tsim cov oxides tiv thaiv.
253MA muaj lub zog siab ntawm qhov kub thiab txias thiab yog li ntawd feem ntau siv rau hauv cov txheej txheem thiab kev siv lub siab-cov kabmob ntawm qhov kub ntawm ib puag ncig 500 degree -900 degree .
253MA yuav nkag mus rau hauv qhov kub thiab txias ntawm 425-860 degree . Qhov no tsis muaj kev cuam tshuam rau cov ntawv thov kub, tab sis yuav ua rau txo qis hauv kev tiv thaiv corrosion los ntawm aqueous daws.
Kev kho cua sov
Kev daws teeb meem (annealing)
Tshav kub rau 1050-1150 degree thiab txias sai sai. Nws raug pom zoo tias cov khoom siv yuav tsum tau kho tom qab 10-20% txias ua haujlwm kom tau txais lub zog siab tshaj plaws.
Kev kho cua sov tsis tuaj yeem ua kom tawv
vuam
Kev ua haujlwm vuam zoo heev, haum rau txhua tus qauv fusion vuam txoj kev. AS 1554.6 ua ntej tsim nyog vuam nrog txuam 22.12HT electrodes. Yog tias lub zog qis dua tuaj yeem siv tau, 309 muab tub lim hlau tuaj yeem siv. Ntshiab argon yuav tsum tau siv los ua cov roj tiv thaiv.
tshuab
Zoo li lwm yam austenitic stainless hlau, machining yuav tsum tau cov cuab yeej ntse, qeeb ceev, thiab muaj zog pub.
daim ntawv thov raug
Cov khoom siv hluav taws xob cua sov xws li cov hluav taws kub, cov khoom siv, cov kiv cua, cov clamps thiab cov pob tawb, cov menyuam, cov kab taug kev, cov raj radiant, hluav taws xob cua sov cov ntsiab lus, refractory anchors, hoods, flues, grates, bllows expansion pob qij txha, petrochemical thiab refinery nroj tsuag ntawm casing hangers.
Cov ntaub ntawv kev ua tau zoo tau teev nyob rau hauv cov qauv specifications
ASTM A240 / A240M qhia txog cov khoom ntawm S30815 ca dov khoom (phaj, ntawv thiab coil). Rau lwm cov khoom xws li cov kav dej ntawm cov lus qhia tshwj xeeb, zoo sib xws tab sis tsis tas yuav tsum tau teev cov kev ua tau zoo tib yam.
