Cov khoom siv dab tsi yog UNS S32750 dual-theem steel? 1.4410 sib raug rau cov khoom lag luam hauv tsev
Tshuaj muaj pes tsawg leeg ntawm 2507 duplex stainless hlau:
C Tsawg dua lossis sib npaug rau {{0}}.03, Si Less dua lossis sib npaug rau {{10}}}.080, Mn Tsawg dua lossis sib npaug rau 1.2, Cr:24-26, Ni:6-8, S Less dua lossis sib npaug li 0.02, P Tsawg dua lossis sib npaug 0.035, Mo:3-5, N:0.24-0. 32
Tom qab tsim kev kho mob ntawm 2507 stainless hlau, lub microstructure ntawm cov hlau no muaj ib qho zoo tagnrho dual-theem qauv nrog ib tug / piv ntawm kwv yees li 50/50. Thaum cov khoom kub kub siab tshaj 1050 degree, tus naj npawb ntawm ferrite theem hauv steel yuav nce raws li qhov kub thiab txias, tab sis vim muaj cov ntsiab lus nitrogen siab, qhov feem ntawm cov theem steel yuav tsis hloov qis dua 1300 degree. Yog tias cov hlau no tsis muaj hnub nyoog ntawm qhov sib txawv ntawm qhov kub thiab txias (los yog cuam tshuam los ntawm tshav kub), 2 yuav raug tsim rau ntawm + matrix thiab δ, χ, R, ' intermetallic theem thiab Cr2N thiab lwm yam oxides yuav los nag. Vim muaj cov ntsiab lus carbon hauv cov hlau qis (feem ntau 0.01%-0.02%), yog li feem ntau tsis muaj carbides hauv cov hlau.
2507 Stainless Hlau 2507 yog ib qho ferritic-austenitic (duplex) stainless hlau, uas sib txuas cov txiaj ntsig zoo tshaj plaws ntawm ntau cov ferritic steels thiab austenitic steels, vim muaj cov ntsiab lus chromium thiab molybdenum siab ntawm cov hlau. , yog li nws muaj kev tiv thaiv zoo heev rau pitting corrosion, crevice corrosion thiab uniform corrosion. Ob txoj kev microstructure xyuas kom meej tias cov hlau muaj kev tiv thaiv kev ntxhov siab corrosion thiab muaj zog txhua yam.
2507 stainless hlau yog siv hauv kev lag luam roj thiab roj; offshore Shipotian roj platforms (kub exchanger raj, dej kho thiab dej system, hluav taws xob tiv thaiv systems, dej tshuaj tsuag tshuab, dej stabilization systems; petrochemical khoom; desalination (desalination) khoom (thiab khoom siv) high-pressure kav, seawater kav); mechanical thiab structural Cheebtsam uas xav tau ob qho tib si lub zog thiab siab corrosion kuj; combustion (khoom siv) gas purification khoom.
2507 duplex stainless hlau teb chaws tus qauv:
ASTM/ASME:A240-UNS S32750
EURONORM:1.4410 - X2 Cr Ni Mon 25.7.4
AFNOR: Z3 CN 25.06 Az
DIN/EN 1.4410, ASME SA -240
Ua raws li lub teb chaws hom 022Cr25Ni7Mo4N (S25073)
2507 duplex stainless hlau corrosion kuj
1. General corrosion
Qhov siab dua chromium thiab molybdenum cov ntsiab lus ntawm SAF 2507 ua rau nws zoo heev rau tag nrho corrosion tiv thaiv cov organic acids xws li formic acid thiab acetic acid. SAF 2507 alloy kuj tseem tiv taus cov tshuaj inorganic acids, tshwj xeeb tshaj yog cov uas muaj chlorides. corrosion kuj.
Piv nrog rau 904L, SAF2507 muaj zog corrosion kuj tiv thaiv dilute sulfuric acid tov nrog chloride ions. 904L yog ib qho hlau nyob rau hauv lub xeev austenitic thiab yog tsim tshwj xeeb los tiv thaiv cov ntshiab sulfuric acid corrosion.
Qib 316L tsis tuaj yeem siv nyob rau hauv ib puag ncig hydrochloric acid, vim tias nws yuav raug corrosion hauv zos lossis tag nrho corrosion. SAF2507 tuaj yeem siv rau hauv dilute hydrochloric acid ib puag ncig thiab muaj zog tiv thaiv qhov chaw puas thiab crevice corrosion.
2. Intergranular corrosion
Cov ntsiab lus qis carbon ntawm nSAF 2507 zoo heev txo qhov kev pheej hmoo ntawm carbide nag lossis daus ntawm cov nplej thaum kho cua sov. Yog li ntawd, cov hlau no muaj peev xwm tiv taus carbide-txog intergranular corrosion.
3. Kev nyuaj siab corrosion cracking
Cov qauv duplex ntawm SAF 2507 ua rau nws tiv taus kev ntxhov siab corrosion tawg. Vim nws cov ntsiab lus alloy siab dua, SAF 2507 muaj kev tiv thaiv corrosion zoo dua thiab muaj zog dua 2205.
Cov kab nrib pleb yog yuav luag tsis pom nyob rau hauv kev tsim kho thiab lwm yam, uas ua rau cov hlau tsis muaj zog ntau dua rau corrosion nyob rau hauv ib puag ncig chloride. SAF 2507 muaj qhov muaj peev xwm tiv thaiv xeb xeb. Isocorrosion nkhaus ntawm SAF 2507 hauv sulfuric acid uas muaj 2000ppm chloride ions 0.1 hli / xyoo; iso-corrosion nkhaus hauv hydrochloric acid 0.1 hli / xyoo.
Cov khoom siv tshuab: SAF 2507 muaj lub zog compressive siab, cuam tshuam lub zog, qis thermal expansion coefficient thiab siab thermal conductivity. Cov khoom no tsim nyog rau ntau yam qauv thiab cov khoom siv kho tshuab. SAF 2507 muaj kev cuam tshuam lub zog thiab tsis haum rau kev khaws cia ntev. Qhov kub siab tshaj 570 degree F tuaj yeem ua rau nws lub zog tsis muaj zog.
Daim ntawv thov teb ntawm 2507 duplex stainless hlau:
S25073 (2507) stainless hlau yeeb nkab yog cov hlau uas tiv taus lub zos corrosion ntawm duplex stainless hlau, tshwj xeeb tshaj yog pitting corrosion, thiab muaj cov yam ntxwv ntawm lub zog siab, tsis kam mus rau chloride kev nyuaj siab corrosion, thiab weldability. Nws yog qhov tsim nyog rau kev siv tshuaj lom neeg, roj av, petrochemical thiab hluav taws xob siv. Cov khoom siv hluav taws xob sib pauv siv cov dej hauv dej, dej hauv av thiab dej hiav txwv ua cov xov xwm txias hauv kev lag luam, nrog rau kev lag luam hauv cov ntaub ntawv thiab ntawv, seawater desalination, flue gas purification, heat exchangers, chemical tanker piping systems, seawater systems, etc.
Txhawb cov khoom siv vuam: ER2594 vuam hlau, E2594 vuam pas nrig
Daim ntawv thov thaj chaw: kev lag luam pulp thiab ntawv, seawater desalination, flue gas purification, heat exchangers, chemical tanker piping systems, seawater systems, thiab lwm yam.
