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Austenitic-ferritic stainless hlau variants muaj ntau dua rau kev ntxhov siab corrosion tawg, tab sis qis zog dua li Austenitic 304 thiab 316 Stainless hlau. Cov ntaub ntawv xws li tau qhab nia 2205, F51, F53 thiab F60. Duplex stainless hlau tau loj nyob rau hauv cov npe nrov tau ntau xyoo vim yog lawv cov khoom siv hluav taws xob zoo nkauj, tshwj xeeb yog muab cov nqi ntau dua, tus nqi sib txawv yog tam sim no me me.

Lawv pab tau hloov kho thiab txawm ntxuav cov khoos phis tawm no. Lub corrosion tsis kam thiab tensile cov khoom ntawm ob tus steel hlau zawv zawg flam flanges yog nthuav dav piv rau feem ntau stainless hlau flanges.

Piv nrog rau cov neeg siv tshuaj pab pawg ua kom zoo nkauj, lawv muaj peev xwm los nagmes ntawm Sigma theem, Nitrides thiab carbides, ua rau corrosion thiab txo corrosion tsis kam. DupleX steel yeeb nkab yog ib qho Ultra-steel haum rau siv cov kev mob corrosive uas muaj zog heev zog yog qhov yuav tsum tau ua.

Cov cuab yeej ua lag luam tshaj plaws siv Duplex 2205. Kuj tseem siv los ntawm kev lag luam cia thiab tsheb thauj mus los. Pulp thiab cov ntawv luam tawm, tso tsheb hlau luam thiab ntawv ua kua thiab ntawv tshuab kuj siv duplex 2205. Nws yog qhov zoo rau kev siv hauv ib puag ncig marine.

Raws li kev dig muag hauv nruab nrab hlau, Duplex dig muag tsa lub ntsej muag muaj zog thiab ob zaug rau cov neeg siv hluav taws xob piv rau cov qauv hlau stainless hlau ASTM 316L.

Dual-theem hlau pob tw-welded tsa lub ntsej muag lub ntsej muag flanges muab kev txiav kom zoo heev thiab kev hnav khaub ncaws nce thiab teeb tsa lub sijhawm.

Qhov tsim ntawm intermetallic theem xws li Sigma theem hauv Rerrrex flange tshwm sim hauv qhov kub thiab txias ntawm 350¡Ãc (475Ãc (475Ãc (475Ãc (475Ãc (475Ãc (475Ãc (475Ãc (475,000).

Cov tswv yim yooj yim ntawm ob theem steel ntev ratt weld flanges yog tsim cov tshuaj muaj kuab lom uas ua rau muaj kev sib npaug ntawm ferrite thiab austenite. Cov tshuaj lom neeg cov tshuaj lom neeg ntawm cov hlau duplex lap flanges yog sib npaug los tsim li ntawm ferrite thiab Austenite raws li kev daws txoj cai.

Chromium, Molybdenum, nitrogen thiab npib tsib yog qhov tseem ceeb tshaj plaws ntawm cov tshuab, lub cev thiab corrosion thaj chaw ntawm cov hlwv ntawm ob lub stuple. Chromium yog qhov tsim nyog los tsim cov chromium passivation zaj duab xis txaus los tiv thaiv hlau los ntawm cov huab cua tsis huv. Ntau dua cov ntsiab lus chromium, qhov zoo dua rau corrosion tsis kam.

2205 chav hlau chav roj muaj ob-theem microstructure ntawm ferrite thiab austenite. Thaum nws los txog rau cov tshuaj lom neeg muaj pes tsawg leeg ntawm 2205 duplex steel flanges, lawv feem ntau muaj 22% chromium, 3% molybdenum thiab 5-6% nyob rau hauv daim ntawv ntawm alloyed stainless hlau.

Chromium yog ib tug ferrite yav dhau los, uas txhais tau tias nws txhawb nqa cov qauv BCC qauv ntawm cov hlau. Nws kuj tseem nce oxidation tiv thaiv nyob rau ntawm qhov kub. Siab chromium kuj txhawb kev tsim ntawm intermetallic theem, uas yog detrimental rau Duplex stainless hlau thiab yuav tsum tau hais.

Peb yog ib qho ntawm cov neeg tsim khoom loj tshaj plaws ntawm Duplex Steel zawv zawg Flanges nrog kev qaug zog zoo lub zog thiab siab corrosion tsis kam. 2205 Duplex Steel tsis pom flange tseem hu rau nws ntau yam khoom, xws li tau ua kom zoo heev los tawg, thiab corrosion hauv kev hnyav ib puag ncig.

Molybdenum nce tsis kam rau pitting thiab corrosion corrosion. Txawm li cas los xij, nws cov ntsiab lus hauv Duplex Stainless hlau feem ntau yog txwv rau tsawg dua 4% vim tias mo kuj yog tus ferrite yav dhau los thiab tuaj yeem ua rau tsis xav tau theem. Nitrogen txhim kho tsis kam rau pitting thiab corrose corrosion.

Cov tshuaj lom neeg cov tshuaj lom neeg ntawm cov roj duplex f51 muaj cov pa roj carbon, chromium, mancese, molybdenum, npib tsib xee thiab phosphorus. Flanges tau siv rau hauv siab nruab nrab thiab cov fittings valve.

Nws tseem zoo heev rau lub zog li cov khoom siv tau zoo tshaj plaws ntxiv dag zog. Nitrogen yog ib qho muaj zog Austenite yav tas los qub, thiab ntxiv rau ntawm nitrogen zoo heev txhim kho cov tawv ntawm ob theem steels. Nws kuj ncua qhov tsim ntawm intermetallic cov tebchaw txaus kom tso cai rau kev ua thiab FOORICE ntawm ob hom hlau. Nickel yog ib qho kev siv tsis huv uas txhawb kev tsim ntawm Austenitic FCC qauv, uas ua rau muaj kev sib zog ntawm ob theem steels.

Rau ob lub stainless hlau flanges, tov annealing ntawm qhov ntsuas kub kom tsim nyog tuaj yeem ua tiav cov kev sib npaug zoo tshaj plaws ntawm theem. Nws yog ib qho tseem ceeb kom lub sijhawm nruab nrab ntawm kev tawm hauv lub cub tawg thiab dej quenching li luv tau. Qhov no yog kom txo qhov kub cua sov los ntawm flange, uas tuaj yeem ua rau muaj nag kev ua ntej dej tso tseg ua ntej tso dej sov.

Cov hlau dua lub lag luam tau qhia rau kev ua lag luam raws li kev ua haujlwm cuam tshuam nrog cov teeb meem kev ntxhov siab uas tshwm sim los ntawm chlorine daws teeb meem. Cov tshuaj lom neeg muaj pes tsawg leeg ntawm cov khoom siv dullex flange kuj ua rau cov flanges tsawg dua rau cov chlorine-ntxias pitting corrosion. Cov alloys no tsis tshua kim dua li cov hlau uas muaj menyuam yaus npib tsib xee.

Txij li thaum Nickel yog cov khoom siv khoom siv, tus nqi ntawm kev siv cov alloys uas tau siv cov alloys zoo li yuav kim heev. Txawm hais tias muaj cov ntsiab lus tsis muaj npe ntawm Nickel, Duplex 2205 flanges tswj hwm ntau yam khoom yog vim cov ntsiab lus siab ntawm Molybdenum thiab chromium.

Cov ntsiab lus chromium yog li ntawm 20-28%, uas yog vim li cas uns uns uns uns tsis s31803 \ unson1205 dig muag flanges yauv tsis txaus siab hu ua passivation. Nyob rau hauv qhov xwm txheej no, kev kho tus kheej txoj kev tiv thaiv nws tus kheej passivating oxide txheej nyob ib puag ncig lub flange ua nws tiv taus oxidation.

Duplex stainless hlau flanges tau dav siv nyob rau hauv cov roj ntsha thiab roj kev lag luam uas lawv raug rau corrosive roj. Nyob rau hauv cov roj thiab roj kev lag luam, qhov twg xov xwm thauj tau sai nyob hauv cov channel sai li, cov khoom siv uas tau siv ntawm no tuaj yeem siv ntawm no.

Duplex cov hlau stainless yeeb nkab muag khoom pom zoo cov kev ua haujlwm rau ntau yam haujlwm ntawm kev ua haujlwm tau zoo li cov haujlwm ntawm kev ua haujlwm ntawm kev ua haujlwm ntawm kev ua haujlwm ntawm kev ua haujlwm ntawm lub cev, I.E. Los ntawm hom 304 lossis 316 txog 6% Molybdenum stainless hlau.

Raws li nrog txhua tus stainless hlau qib, corrosion tsis kam ntawm cov hlau lossis alloy nyob ntawm feem ntau ntawm cov hlau, nyob rau hauv cov ntaub ntawv no stainless hlau. Rau kev tiv thaiv mus rau chloride pitting thiab crevice corrosion, cov ntsiab lus ntawm cov ntsiab lus xws li chromium, molybdenum thiab nitrogen yog qhov tseem ceeb tshaj plaws.

Rau cov qauv kev ua kom muaj kev sib tw ntawm cov qib tsis zoo (xws li 304 thiab 316), SCC tuaj yeem yog qhov teeb meem uas muaj av noo thiab muaj qee yam tshuaj lom li chlorides. Yog li ntawd, Duplex dig muag Flange cov neeg muag khoom feem ntau muab lawv rau kev lag luam xws li roj thiab muaj kev lag luam, kev lag luam petrochemical thiab marine.

Cov khoom siv S32205 DuPlex Asme asme sa182 pob tw Weld Flanges yog tsim nyog rau dej hiav txwv thiab cov khoom siv hluav taws xob tuaj yeem tiv thaiv kom sov txog 600,000Ãf, thaum tseem muaj cov yam ntxwv zoo.

Txij li Duplex stainless hlau muaj qis npib tsib xee thiab molybdenum cov ntsiab lus tshaj li cov hlau me me, lawv zoo li muaj kev sib txawv ntawm corrosion. Cov ntsiab lus qis dua cov ntsiab lus ntawm cov yas stlex stainless txhais txhais tau hais tias tus nqi qis. Qhov no muaj tseeb, tshwj xeeb tshaj yog thaum Alloy Surchares yog qhov siab. Tsis tas li, vim muaj ntau dua cov txiaj ntsig lub zog ntawm cov hlwv ntawm ob lub stlexs piv rau ustenitic steels, nws yog feem ntau ua tau los txo lawv cov ntu thicknesses. Qhov kev sib xyaw ua ke no tseem tuaj yeem txo tus nqi thiab qhov hnyav ntawm 150 qib Duplex yeeb nkab qhov ntev piv rau cov khoom siv hauv kev ua haujlwm hauv cov qib tsis zoo.

Ib txoj haujlwm thib ob ntawm cov roj av chav ua haujlwm yog los pab cov neeg ua haujlwm uas nkag mus rau cov kab ke no kom huv si, tshawb xyuas lossis hloov kho lawv. Feem ntau, cov ntawv thov ntawm lub twj tso kua mis steeles, cov nroj tsuag thermal, dej ntws roj chees, kev tsim kho, thiab pulp thiab pulp thiab cov ntawv mills. Cov lag luam no siv cov tshuab raj xa tawm kom hloov xov xwm, uas feem ntau tsim qee yam ntawm cov pa taws.

Duplex stainless tus khub qib yog lub npe denplex vim tias cov qib ob flange sib npaug muaj ob-theem microstructure. Qhov no ob-theem microstructure muaj cov ferritic thiab ustenitic stainless hlau-zoo li nplej. Raws li lub npe qhia, lub duplex kev tsim kho muab cov duplex stainless ntsaws qhov hluav taws xob muaj ntau yam khoom txaus nyiam.

Siv cov hlua S31803 DupleX steel yeeb nkab flanges ua kom muaj kev ua tau zoo, siab dua lub neej kev ua haujlwm. Vim tias dual xwm ntawm Austenitic thiab Ferritic Micrtructures tam sim no nyob rau hauv vaj huam sib luag, cov theem kub thiab ob sab flange cov khoom siv ntawm ob qho tib si steels.

Duplex stainless hlau muaj ib tug qauv sib xyaw ntawm lub cev-nruab nrab lotub (BCC) Ferrite thiab ntsej muag-nruab nrab lo teb (FCC) Austenite. Tus nqi ntawm txhua theem yog txoj haujlwm ntawm kev sib xyaw thiab kev kho cua sov lossis keeb kwm kev kub. Txawm li cas los xij, feem ntau cov duplex stainless hlau yog feem ntau yog feem ntau yog muaj kev sib npaug ntawm cov nyiaj sib npaug (ntim cov ferrite thiab austenite.

Duplex Steel zawv zawg tsa lub ntsej muag muaj lub ntsej muag muaj kev tawm tsam, ua rau cov dej hiav txwv loj heev rau cov roj hauv dej tob thiab ntau ntawm lwm cov roj thiab roj app.