Nplooj 3 ntawm 8

Kev sib xyaw ntawm chromium, molybdenum thiab nitrogen muab 2205 zoo tsis kam rau chloride pitting thiab crevice corrosion. Qhov kev tiv thaiv no yog qhov tseem ceeb tshaj plaws rau cov kev pab, cov dej brackish, cov dej num ua kom dawb, kaw cov ntaub ntawv ua zaub mov noj thiab qee qhov kev siv zaub mov noj.

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.

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.

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.

Qhov zoo dua ntawm cov qauv dual Qhov kev pabcuam kub ntawm 2205 duplex stainless hlau yuav tsum tau txwv rau hauv qab 600¡Ãf. Ntev tau raug rau qhov kub siab tuaj yeem ua 2205 stainless hlau nkig.

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.

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.

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.

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.

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.

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.

Cov ntsiab lus tseem ceeb yog cov chromium thiab npib tsib xee, tab sis nitrogen, coper, siliab thiab tungsten tau ntxiv rau kev sib npaug ntawm kev sib npaug thiab cuam tshuam qee yam corrosion-resistant tej yam ntxwv. Lub corrosion resistance ntawm cov hlau uas tsis muaj roj dulex zoo ib yam li ntawm cov hlau uas muaj cov hlau tsis muaj zoo sib xws li Alloy.

Tus qauv ntawm 2205 duplex stainless hlau muaj cov pas dej ntawm Austenite ib puag ncig los ntawm kev txuas ntxiv ferrite theem. Nyob rau hauv anealed mob, 2205 muaj kwv yees li 40-50% ferrite. 2205 feem ntau raug xa mus ua cov qib haujlwm ua haujlwm thiab yog cov dav dav siv dav dav hauv tsev neeg lub cev tsis muaj roj stuple.

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.

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.

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).

Lub zog kub kub ntawm dual theem steel steel flanges zoo ib yam li Alloy 100 li ntawm 950 txog 1150¡Ãc. Txawm li cas los xij, lub zog tensile ntawm cov flanges nce sai sai hauv qab 900¡Ãc.

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.

Duplex 2205 yog nitrogen txhim kho cov yas stainless hlau tsim los daws cov teeb meem corrosion nrog 300 series cov hlau stainless. "Duplex" piav qhia txog tsev neeg ntawm stainless cov hlau uas tsis yog Austenitic (xws li 304 stainless hlau) tsis yog 430 stainless hlau).

Rau ntau cov ntawv thov uas 300 series stainless hlau yog qhov raug rau cov chloride kev ntxhov siab tawg, 2205 duplex stainless hlau yog qhov kev daws teeb meem zoo. Kev ntxhov siab corrosion tawg tshwm sim thaum stainless hlau yog raug rau tensile muaj kev ntxhov siab thaum sib cuag nrog cov kev daws teeb meem uas muaj chlorides. Kev kub siab dua kub kuj nce ntxiv qhov kev ua kom muaj kev phom sij ntawm cov hlau tsis muaj mob corrosion.

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.

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.

Lub siab chromium, molybdenum thiab nitrogen cov ntsiab lus ntawm 2205 muab zoo dua corrosion tsis kam dua li 316L thiab 317L thiab 317l thiab 317l thiab 317l thiab 317l thiab 317l thiab 317l thiab 317l thiab 317l thiab 317l thiab 317l thiab 317l nyob rau hauv feem ntau cov chaw ib puag ncig. Cov alloy txawv no yog siv hauv cov roj thiab roj kev tshawb nrhiav thiab tseem siv hauv kev lag luam ua lag luam.

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.

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.

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.