2507 super duplex stainless hlau khwv tau nws lub koob npe nrov ua tus neeg sib ntaus sib tua xeb zoo tshaj plaws. Nws cov tshuaj lom neeg tshwj xeeb muaj cov chromium, molybdenum, thiab nitrogen ntau heev. Cov khoom no tsim cov qauv microstructure ob theem sib npaug. Cov qauv no muab cov ntaub ntawv zoo li a2507 S32750 Super Duplex Round BarKev tiv thaiv zoo tshaj plaws tiv thaiv kev xeb ntawm qhov chaw tawg, kev xeb tawg, thiab kev xeb tawg. Nws ua haujlwm tau zoo hauv cov chaw ib puag ncig hnyav xws li dej hiav txwv thiab cov chaw ua tshuaj lom neeg, qhov twg cov khoom siv txheem tsis ua haujlwm.
Cov Ntsiab Lus Tseem Ceeb
- 2507 super duplex steel tiv taus xeb zoo heev. Nws muaj cov khoom xyaw tshwj xeeb xws li chromium, molybdenum, thiab nitrogen. Cov no ua rau nws muaj zog tiv thaiv xeb thiab tawg.
- Cov hlau no muaj ob ntu tshwj xeeb. Cov qauv no ua rau nws muaj zog thiab tawv. Nws ua haujlwm tau zoo hauv cov chaw nyuaj xws li dej hiav txwv.
- 2507 hlau muaj zog dua li cov hlau tsis xeb ib txwm muaj. Nws kuj tiv taus xeb zoo dua. Qhov no yog vim li cas nws thiaj siv rau hauv cov haujlwm nyuaj xws li cov chaw khawb roj thiab cov chaw tsim tshuaj lom neeg.
- Siv 2507 hlau kim dua thaum xub thawj. Tab sis nws kav ntev. Nws xav tau kev kho tsawg dua. Qhov no txuag tau nyiaj ntau xyoo.
Dab tsi txhais tau tias 2507 Super Duplex Steel?
Kev ua tau zoo tshaj plaws ntawm2507 super duplex hlauyog los ntawm ob lub ntsiab lus tseem ceeb: nws cov tshuaj lom neeg muaj pes tsawg leeg thiab nws cov qauv sab hauv tshwj xeeb. Cov ntsiab lus no ua haujlwm ua ke los tsim cov khoom siv uas tsim los rau cov xwm txheej nyuaj.
Cov Tshuaj Siv Rau Kev Tiv Thaiv
Lub zog ntawm cov hlau alloy pib nrog kev sib xyaw ua ke ntawm cov ntsiab lus tshwj xeeb. Cov chromium, molybdenum, thiab nitrogen ntau yog cov tsav tsheb tseem ceeb ntawm nws lub peev xwm tiv thaiv xeb. Cov qauv kev lag luam txhais cov khoom tseem ceeb no hauv cov qib nruj kom lav qhov ua tau zoo.
| Khoom | Feem pua ntawm cov nyiaj tau los (%) |
|---|---|
| Chromium (Cr) | 24.0–26.0 |
| Molybdenum (Mo) | 3.0–5.0 |
| Nitrogen (N) | 0.24–0.32 |
Cov mis no ua rau cov khoom sib txawv ntawm lwm cov khoomqib ob chavPiv txwv li, thaum piv rau qib 2205, 2507 muaj cov qib siab dua ntawm cov ntsiab lus tseem ceeb uas tiv taus corrosion.
Qhov Zoo ntawm Ob-Theem Microstructure
Tsis tas li ntawd xwb, cov hlau sab hauv muaj qhov zoo dua. Nws muaj ob theem microstructure sib npaug, muaj cov austenite thiab ferrite yuav luag sib npaug.
Qhov no txhais li cas?
Cov qauv ob no muab cov khoom zoo tshaj plaws ntawm ob theem sib xyaw ua ke. Qhov feem ferritic muab lub zog siab thiab tiv taus kev ntxhov siab corrosion cracking, thaum qhov feem austenitic muab kev tawv zoo heev thiab kev tiv thaiv corrosion dav dav.
Qhov kev sib xyaw ua ke no tsis yog qhov xwm txheej. Cov kws ua vaj tse tsim cov qauv no kom ua tau zoo tshaj plaws. Kev sib xyaw ua ke ntawm cov theem austenitic thiab ferritic ua rau cov kab nrib pleb tsis zoo. Lub tshuab no muab cov khoom siv rau nws txoj kev tiv thaiv zoo tshaj plaws tiv thaiv kev ntxhov siab corrosion cracking, uas yog hom kev ua tsis tiav feem ntau hauv cov chaw muaj chloride ntau. Qhov tshwm sim yog cov khoom siv ruaj khov uas tswj nws qhov kev ncaj ncees qhov twg lwm tus yuav ua tsis tiav.
Cov Khoom Tseem Ceeb ntawm 2507
Lub koob npe nrov ntawm 2507 super duplex steel yog tsim los ntawm lub hauv paus ntawm kev ntsuas tau thiab kev ua tau zoo tshaj plaws. Nws cov tshuaj lom neeg siab heev thiab microstructure txhais ncaj qha mus rau hauv lub zog kho tshuab zoo dua, kev tiv thaiv corrosion ntsuas tau, thiab qhov kub thiab txias ua haujlwm tau zoo. Cov khoom no ua rau nws yog cov khoom siv xaiv rau cov ntawv thov kev lag luam xav tau tshaj plaws.
Lub Zog Kho Kom Zoo Dua
Super duplex steel 2507 muaj zog heev, feem ntau yog ob npaug ntawm cov hlau austenitic stainless hlau zoo li 316L. Qhov sib piv ntawm lub zog thiab qhov hnyav no muab qhov zoo dua rau kev tsim qauv. Cov kws ua haujlwm tuaj yeem siv cov khoom nyias dua ntawm cov khoom yam tsis muaj kev cuam tshuam rau kev ua haujlwm ntawm cov qauv. Lub peev xwm no ua rau cov khoom sib dua thiab muaj peev xwm txuag tau nyiaj hauv cov khoom siv thiab cov qauv txhawb nqa.
Cov hlau no ua tiav cov zog tsim tau zoo kawg li ntawm 550 MPa (80 ksi) thiab lub zog tensile tshaj 800 MPa (116 ksi). Lub zog siab no ua kom cov khoom siv tuaj yeem tiv taus kev nyuaj siab thiab cov khoom siv hnyav.
| Vaj tse | Tus nqi (ksi) | Tus nqi (MPa) |
|---|---|---|
| Yam tsawg kawg nkaus Yield Zog (0.2%) | 80 | 550 |
| Lub Zog Tensile Yam Tsawg Kawg Nkaus | 116 | 800 |
Lub zog no, ua ke nrog nws txoj kev tiv thaiv corrosion zoo heev, muab qib kev ntseeg siab uas lwm cov ntaub ntawv tsis tuaj yeem sib piv hauv cov xwm txheej kev pabcuam hnyav.
Corrosion Resistance Metrics (PREN)
Cov kws ua vaj tse siv ib qho kev ntsuas tshwj xeeb los kwv yees thiab piv qhov kev tiv thaiv xeb ntawm cov hlau tsis xeb. Qhov kev ntsuas no yog Pitting Resistance Equivalent Number (PREN). Tus nqi PREN siab dua qhia tau tias muaj kev tiv thaiv xeb ntau dua, tshwj xeeb tshaj yog los ntawm chlorides.
PREN suav li cas?
Cov qauv kev lag luam rau duplex stainless hlau yog:PREN = %Cr + 3.3(%Mo) + 16(%N)Cov mis no qhia tau hais tias chromium (Cr), molybdenum (Mo), thiab nitrogen (N) txhua tus pab txhawb rau lub peev xwm tiv thaiv ntawm cov hlau.
Nrog nws cov tshuaj lom neeg muaj ntau yam, 2507 super duplex steel ua tiav tus nqi PREN uas siab dua li lwm cov hlau sib xyaw. Qhov kev ntsuas zoo no lees paub nws txoj haujlwm ua tus ua tau zoo tshaj plaws hauv cov chaw muaj chloride ntau.
| Hom hlau nplaum | Tus nqi PREN ib txwm muaj |
|---|---|
| 316L Stainless hlau | 25 |
| 2205 Duplex Hlau | 35 |
| 2507 Super Duplex Hlau | ≥ 42 |
Tus nqi PREN siab no txhais tau ncaj qha rau kev ua tau zoo hauv cov ntawv thov xws li cov khoom siv hauv qab dej hiav txwv thiab cov nroj tsuag desalination, qhov twg kev tiv thaiv rau pitting yog qhov tseem ceeb rau lub neej ua haujlwm ntev.
Kev Nyab Xeeb Kub Ua Haujlwm Ntau Yam
Ob-theem microstructure ntawm no superob lub hlauqhia nws qhov kub ua haujlwm tau zoo. Cov khoom siv tswj nws cov khoom siv zoo heev thiab tiv taus xeb ntawm qhov kub txog li 300 ° C (572 ° F).
Txawm li cas los xij, kev raug kub ntev tshaj qhov txwv no tuaj yeem ua rau muaj cov theem brittle hauv cov qauv microstructure. Qhov kev hloov pauv no tuaj yeem txo cov khoom siv lub zog thiab kev tiv thaiv corrosion. Ntawm qhov kawg qis dua, cov hlau alloy tswj tau qhov zoo toughness mus txog -50 ° C (-58 ° F), txawm hais tias nws yuav muaj kev hloov pauv ductile-rau-brittle ntawm qhov kub cryogenic qis heev. Kev ua haujlwm hauv lub qhov rais kub no yog qhov tseem ceeb kom ntseeg tau tias cov khoom siv xa nws cov peev xwm ua tau zoo tag nrho.
2507 siv qhov twg?
Cov khoom tshwj xeeb ntawm2507 super duplex hlauua rau nws tsis tseem ceeb hauv kev lag luam uas cov khoom siv tsis ua haujlwm tsis yog ib qho kev xaiv. Nws qhov kev sib xyaw ua ke ntawm lub zog siab thiab kev tiv thaiv corrosion zoo dua tso cai rau nws ua haujlwm tau zoo hauv qee qhov chaw muaj kev kub ntxhov tshaj plaws hauv ntiaj teb. Cov kws ua haujlwm tau teev cov hlau no rau cov ntawv thov tseem ceeb thoob plaws cov roj thiab roj, marine, thiab cov khoom siv ua tshuaj.
Cov Khoom Siv Roj thiab Roj Av Hauv Qab Dej
Kev lag luam roj thiab roj av hauv dej hiav txwv tob ua haujlwm nyob rau hauv cov xwm txheej hnyav. Kev kub siab, qhov kub qis, thiab kev raug dej hiav txwv corrosive tas li tsim ib puag ncig nyuaj rau txhua yam khoom siv. Super duplex steel zoo tshaj plaws ntawm no, muab qhov ruaj khov tsim nyog rau kev teeb tsa hauv dej hiav txwv mus sij hawm ntev. Nws lub zog siab tso cai rau cov khoom sib dua, qhov zoo dua hauv cov haujlwm dej tob.
Cov Lus Qhia Txog Qhov Teeb Meem:Ib lub tuam txhab roj av hauv tebchaws Canada tau siv Super Duplex Stainless Steel 2507 ua tiav rau kev tsim cov kav dej hauv ib qho chaw ua roj av hauv hiav txwv ze Newfoundland. Qhov kev xaiv no tau hais txog qhov teeb meem loj ntawm kev xeb ntawm dej hiav txwv, ua pov thawj tias cov khoom siv no muaj txiaj ntsig zoo rau kev siv hauv dej tob.
Cov khoom siv hauv qab dej hiav txwv uas tau txais txiaj ntsig los ntawm cov hlau nplaum siab heev no suav nrog:
- Cov kav dej hauv qab dej thiab cov kav dej
- Cov kab ntws thiab cov risers
- Cov Umbilicals thiab mooring systems
- Cov khoom siv sib txuas hauv qab dej hiav txwv
Cov Chaw Tsim Khoom Siv Marine thiab Desalination
Cov chaw nyob hauv dej hiav txwv thiab cov txheej txheem desalination ua rau muaj kev sib ntaus sib tua tas li tiv thaiv kev xeb los ntawm chloride. Cov nroj tsuag dej hiav txwv rov qab osmosis (RO), tshwj xeeb, xav tau cov ntaub ntawv uas tuaj yeem tiv taus cov dej ntsev siab ntawm qhov siab heev. Lub 2507 alloy yog qhov kev daws teeb meem zoo tshaj plaws rau cov xwm txheej no.
Cov khoom tseem ceeb hauv cov twj tso kua siab rau cov dej hiav txwv RO feem ntau yog tsim los ntawm cov hlau super duplex no. Nws qhov xwm txheej ruaj khov ua kom ntseeg tau tias kev ua haujlwm zoo thiab ua rau lub neej ua haujlwm ntawm cov khoom siv tseem ceeb ntev dua. Cov khoom siv feem ntau siv rau:
- Cov kav dej siab thiab cov hlab dej uas tuav dej hiav txwv thiab dej ntsev
- Cov khoom siv twj tso kua mis thiab cov plhaub uas raug rau cov dej ntws hnyav
- Cov tshuab ua haujlwm hauv cov dej ntsev siab thiab cov xwm txheej siab
Kev Ua Tshuaj Lom Zem
Cov chaw ua tshuaj lom neegtswj tau ntau yam tshuaj corrosive, los ntawm cov kua qaub muaj zog mus rau cov tshuaj chloride nplua nuj. Lub qauv super duplex ntawm 2507 muab kev ua tau zoo heev hauv cov chaw ib puag ncig hnyav heev no. Nws qhia tau tias muaj kev tiv thaiv zoo heev rau kev xeb sib xws los ntawm cov inorganic acids xws li sulfuric thiab hydrochloric acid, txawm tias thaum muaj kuab paug nrog chlorides.
Koj puas paub?
Cov hlau no qhia tau tias nws tiv taus cov organic acids zoo, xws li cov uas pom muaj nyob rau hauv cov nroj tsuag terephthalic acid. Nws qhov kev ua tau zoo ua rau nws yog qhov kev xaiv sib tw dua li ntau cov hlau austenitic thiab nickel uas muaj cov hlau ntau.
Nws lub peev xwm tiv taus qhov xeb hauv zos yog qhov tseem ceeb heev. Cov khoom siv muaj qhov kub thiab txias tseem ceeb ntawm kwv yees li 185 ° F (85 ° C) hauv cov chaw chloride, zoo dua li cov hlau tsis xeb ib txwm muaj. Qhov no ua rau nws yog cov khoom siv ntseeg siab rau cov khoom siv cog tseem ceeb, suav nrog:
- Cov Reactors thiab cov hlab ntsha siab
- Cov khoom siv hloov cua sov thiab cov condenser
- Cov thoob dej cia khoom
- Cov kav dej
Cov Kev Xav Txog Kev Siv 2507
Txawm hais tias kev ua tau zoo ntawm super duplex steel tsis muaj qhov sib piv hauv ntau qhov chaw, nws qhov tshwj xeeb xav tau cov txheej txheem tsim khoom tshwj xeeb thiab kev nkag siab meej txog nws cov nqi-txiaj ntsig. Kev tuav kom zoo ua kom cov khoom siv xa tau tag nrho nws lub peev xwm.
Cov Kev Xyaum Zoo Tshaj Plaws rau Kev Vuam thiab Kev Siv Tshuab
Kev tsim cov hlau ua haujlwm siab no xav tau kev ua kom raug. Nws cov qauv ob-theem yog rhiab rau cov voj voog thermal, ua rau cov txheej txheem vuam tswj hwm tseem ceeb.
Cov Lus Qhia Txog Kev Vuam
Cov neeg vuam yuav tsum tswj cov cua sov nkag mus zoo, feem ntau nyob rau hauv qhov ntau ntawm 0.5–2.0 kJ / hli. Qhov kub ntawm qhov vuam hla, hu ua qhov kub ntawm qhov hla, yuav tsum tsis pub tshaj 150 ° C (300 ° F) kom khaws cov hlau qhov sib npaug microstructure.
Kev xaiv cov hlau filler kom raug kuj tseem ceeb heev rau kev vuam zoo. Cov kev xaiv pom zoo suav nrog:
- 2507/P100 cov hlau filler kom ntseeg tau tias muaj cov qauv duplex weld tsim nyog.
- Cov khoom siv nickel alloy fillers, xws li hom C276, los txhim kho kev tiv thaiv corrosion.
- 6% Molybdenum (Mo) cov khoom ntim.
Kev siv cov khoom no kuj muaj teeb meem vim nws muaj zog heev. Cov kev coj ua zoo tshaj plaws yog siv cov cuab yeej carbide ntse, coated thiab cov kua txiav zoo. Cov neeg ua haujlwm tuaj yeem txhim kho kev siv tshuab los ntawm kev siv qhov ceev txiav siab dua ua ke nrog kev pub tsawg dua.
Kev Tshuaj Xyuas Tus Nqi vs. Kev Ua Tau Zoo
Cov hlau super duplex muaj tus nqi yuav khoom pib siab dua piv rau 2205 duplex lossis 316L stainless hlau. Qhov no yog vim nws muaj cov chromium, molybdenum, thiab nitrogen ntau heev. Txawm li cas los xij, kev sib piv tus nqi yooj yim ua rau nkag siab yuam kev.
Kev ntsuam xyuas kom meej dua siv kev tshuaj xyuas Tus Nqi Siv Tau Txhua Lub Sijhawm (LCC). Txoj kev no xam tus nqi tag nrho thoob plaws lub neej ua haujlwm ntawm cov khoom muaj nqis.
Cov Qauv LCC:
Tus Nqi Pib + Cov Nqi Txij Nkawm Mus Ib Txhis + Cov Nqi Hloov - Tus Nqi Cawm Siav
Rau cov khoom muaj nqis ntev (15+ xyoo) hauv cov ntawv thov tseem ceeb, kev nqis peev ua ntej siab dua feem ntau yog qhov tsim nyog. Qhov kev tiv thaiv corrosion zoo dua ntawm cov hlau alloy txo qhov xav tau kev saib xyuas kim, kev kho, thiab kev kaw haujlwm. Hauv cov chaw uas cov khoom siv tsis ua haujlwm tuaj yeem ua rau muaj kev poob loj heev, kev ntseeg tau ntawm cov hlau alloy zoo muab qhov zoo dua kev lag luam thoob plaws nws lub neej tag nrho.
Lub npe ntawm "qhov kawg corrosion fighter" rau 2507 yog qhov tau txais zoo. Nws cov tshuaj lom neeg tshwj xeeb thiab microstructure muab lub zog zoo dua thiab tsis muaj kev tiv thaiv corrosion. Cov khoom no ua rau nws tseem ceeb rau cov ntawv thov kev lag luam uas xav tau tshaj plaws. Txawm li cas los xij, nws qhov kev ua tau zoo nyob ntawm kev siv kom raug. Piv txwv li, qhov ua tsis tiav ntawm lub tshuab cua sov tau tshwm sim thaum cov hlau tau welded rau cov khoom siv tsawg dua, ua rau muaj kab nrib pleb. Cov ntaub ntawv no ua pov thawj tias nyob rau hauv cov chaw tseem ceeb uas qhov ua tsis tiav tsis yog qhov kev xaiv, qhov kev ua tau zoo ntawm cov hlau ua rau nws tus nqi thiab qhov xav tau rau kev coj ua kom zoo.
Cov Lus Nug Feem Ntau
2507 txawv ntawm 2205 duplex steel li cas?
Super duplex 2507 muaj cov chromium, molybdenum, thiab nitrogen ntau dua li 2205 duplex steel. Cov khoom sib xyaw ua ke no muab kev tiv thaiv corrosion zoo dua thiab lub zog kho tshuab zoo dua. Nws cov nqi PREN siab dua lees paub nws cov kev ua tau zoo dua hauv cov chaw muaj chloride hnyav.
Dab tsi ua rau 2507 tiv taus corrosion?
Cov hlau nplaum uas muaj chromium ntau ua rau muaj ib txheej tiv thaiv tsis pub xeb. Molybdenum thiab nitrogen ua rau txheej no zoo dua, thiab nws tiv taus xeb los ntawm qhov tawg thiab tawg. Qhov kev sib xyaw ua ke no ua rau nws ua tau zoo tshaj plaws hauv cov chaw muaj chloride ntau xws li dej hiav txwv.
Puas siv tau 2507 rau hauv cov ntawv thov kub siab?
Cov kws ua haujlwm teev 2507 rau kev pabcuam txog li 300 ° C (572 ° F). Kev raug tshav kub ntev tshaj qhov kub no tuaj yeem hloov nws cov qauv me me, txo qhov tawv thiab kev tiv thaiv xeb. Nws tswj cov khoom zoo hauv qhov kub qis mus txog -50 ° C (-58 ° F), ua rau nws siv tau ntau yam rau ntau yam txheej txheem kev lag luam.
Puas yog 2507 super duplex steel kim heev?
Tus nqi khoom siv pib rau 2507 siab dua li raucov hlau tsis xeb txheemTxawm li cas los xij, nws qhov kev ua tau ntev tshwj xeeb txo qhov kev xav tau kev saib xyuas thiab kev hloov pauv mus sij hawm ntev. Qhov no ua rau nws yog qhov kev xaiv pheej yig rau cov ntawv thov tseem ceeb, lub neej ntev uas kev ntseeg tau yog qhov tseem ceeb.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-26-2025