Duplex Stainless Hlau

Koj tus thawj coj Duplex Stainless Steel Supplier

GNEE Steel Group yog cov khoom lag luam sib koom ua ke nrog rau cov hlau phaj, coils, profiles, sab nraum zoov tsim, thiab ua. Peb cov khoom suav nrog Super Alloys, Inconel Alloys, Incoloy Alloys, Monel Alloys, Duplex Stainless Hlau, Hastelloy Alloys, Titanium Alloys, Tooj Alloys, Aluminium Alloys, Zirconium Alloys, Tantalum Alloy, Niobium Alloy, Molybdenum Alloy, Tungsten Alloys, Stainless Hlau Tube, Stainless Hlau Phaj thiab Sheets, Stainless Hlau Chev, Stainless Hlau Yeeb Fittings, Stainless Hlau Rods thiab Bars.

Vim li cas thiaj xaiv peb?

Kev paub nplua nuj

GNEE Steel Group tau tsim muaj nyob rau hauv 2008 thiab muaj ntau tshaj 10 xyoo ntawm kev tsim steel hlau.

One-Stop Solution

GNEE Steel Group yog ib tug kws tshaj lij, ib-nres muab saw hlau lag luam rau cov khoom siv hlau, npog cov khoom lag luam tshawb fawb thiab kev tsim kho, muag, nce qib, thiab muab kev pabcuam tshaj lij.

Kev lag luam dav

Lub tuam txhab cov khoom raug muag rau Tebchaws Europe, Australia, thiab xa tawm mus rau ntau tshaj 70 lub teb chaws thoob ntiaj teb. Nws muaj tag nrho ntau dua 800 lub tuam txhab kev koom tes thoob ntiaj teb, uas suav nrog 15 lub tuam txhab tsim khoom, 143 engineering project tuam txhab, thiab 23 boiler machinery manufacturers.

Kev xa khoom raws sijhawm

Peb cov khoom muag txhua xyoo yog 1 lab tons, peb cov khoom muag yog 200, 000 tons, thiab peb cov khoom xa tawm txhua xyoo tau mus txog 80, 000 tons, ua kom cov khoom xa tuaj raws sij hawm.

Tsev 12 3 4 5 6 7 Rau sab kawg 1/18

Txhais ntawm Duplex Stainless Hlau

Duplex stainless hlau yog ib tsev neeg ntawm stainless hlau. Cov no yog hu ua duplex (los yog austenitic-ferritic) qib vim tias lawv cov qauv metallurgical muaj ob theem, austenite (lub ntsej muag-centered cubic lattice) thiab ferrite (lub cev nruab nrab ntawm lub lattice) hauv qhov sib npaug sib npaug. Qhov no muab duplex stainless ntau ntawm perks ntawm austenitic thiab ferritic tsev neeg ntawm cov hlau thaum tseem txo cov tsis muaj zog.

Dab tsi yog Qhov Zoo ntawm Duplex Stainless Hlau?

Txhim kho lub zog
Ntau qib duplex muaj ntau npaum li ob zaug muaj zog dua qib austenitic thiab ferritic stainless hlau.

High Toughness thiab Ductility
Duplex stainless hlau yog feem ntau formable nyob rau hauv siab tshaj ferritic qib thiab muab ntau toughness. Txawm hais tias lawv feem ntau muab cov nqi qis dua li cov hlau austenitic, cov qauv tshwj xeeb thiab cov yam ntxwv ntawm cov hlau duplex feem ntau tshaj qhov kev txhawj xeeb.

Siab Corrosion Resistance
Raws li qib hauv nqe lus nug, duplex stainless hlau muaj qhov sib piv (lossis zoo dua) corrosion kuj zoo li qib austenitic. Rau cov hlau uas muaj nitrogen ntxiv, molybdenum, thiab chromium, steels muaj kev tiv thaiv siab rau ob qho tib si crevice corrosion thiab chloride pitting.

Tus nqi siv tau
Duplex stainless hlau muab tag nrho cov txiaj ntsig saum toj no thaum xav tau qis qis ntawm molybdenum thiab npib tsib xee. Qhov no txhais tau hais tias nws yog qhov kev xaiv qis dua li ntau cov qib austenitic ntawm stainless hlau.Tus nqi ntawm duplex alloys feem ntau tsis tshua muaj zog dua li lwm cov qib steel ua rau nws yooj yim rau kwv yees tus nqi -- ob qho tib si nyob rau hauv pem hauv ntej thiab lub neej theem. .Lub zog siab dua thiab corrosion kuj txhais tau hais tias ntau qhov chaw ua los ntawm duplex stainless tuaj yeem ua nyias dua li lawv cov austenitic counterparts muab cov nqi qis dua.

Dab tsi yog Cov Nta ntawm Duplex Stainless Hlau?

Corrosion Resistance

Duplex Stainless Steel Qib muaj cov khoom tiv thaiv corrosion sib npaug lossis txawm tias zoo dua rau qib austenitic. Cov ntsiab lus Chromium siab dua ua ke nrog Molybdenum muab nws siab dua rau pitting thiab crevice corrosion. Pitting Resistance Equivalent Number (PREN) yog siv los ntsuas cov qhab nia raws li lawv qhov tsis kam rau pitting. Ntau dua tus PREN tus lej, siab dua yuav yog nws qhov kev tiv thaiv pitting corrosion.

Stress Corrosion Cracking (SCC) Resistance

Austenitic qib tau raug rau SCC thaum qib ferritic muaj kev tiv thaiv siab dua rau nws. Duplex Stainless hlau muaj SCC zoo dua piv rau qib austenitic tab sis qis dua rau qib ferritic stainless hlau. Nyob rau hauv duplex stainless hlau qib SCC pib hauv cheeb tsam austenitic tab sis raug ntes ntawm ferritic siv lead ua qauv tam sim no ntawm tus ciam teb, yog li tiv thaiv kev nthuav tawm ntawm kev tawg thiab nce sijhawm.

Mechanical Strength

Duplex Stainless hlau muaj zog txhua yam ntau dua li qib austenitic thiab qib ferritic. Nws tso cai siv cov ntu nyias thiab pab txo qhov hnyav. Machining ntawm duplex stainless hlau yog qhov nyuaj thiab qeeb dua piv rau austenite, vim nws muaj zog dua txhua yam.

Vuam

Vuam yog qhov nyuaj piv rau austenite. Kaw tswj ntawm tshav kub input thiab txias npaum li cas yog yuav tsum tau nyob rau hauv thiaj li yuav zam kom tsis txhob tsim ntawm undesired intermetallic theem.

Hom Hom Duplex Stainless Hlau

Lean Duplex Stainless Hlau
Cov qib lean duplex xws li LDX 2101® (S32101), UR 2202 (S32202), ATI 2102® (S82011) thiab 2304 (S32304) yog tus cwj pwm los ntawm cov qib qis ntawm nickel thiab / lossis molybdenum. Txhawm rau them nyiaj rau cov ntsiab lus npib tsib xee txo qis, uas yog qhov muaj zog austenite qub, cov qib no tau nce qib ntawm nitrogen thiab manganese, uas muab cov txiaj ntsig zoo ntawm austenite / ferrite theem. Raws li ib pab pawg, cov qib lean muaj lub zog siab, tshwj xeeb tshaj yog lub zog muaj zog, thiab nthuav tawm pitting thiab crevice corrosion kuj zoo ib yam li, lossis qis dua qhov ntawd, ntawm Hom 316L austenitic qib. Vim tias lawv lub zog muaj zog heev, DSSs lean tau zoo haum rau kev tsim kho tank thiab kev siv cov qauv.

Standard Duplex Stainless hlau
Tus qauv duplex qib feem ntau muaj {{0}}% chromium, 2-3% molybdenum thiab 0.15% nitrogen. Cov qib hauv pawg no tau siv dav thoob plaws txhua qhov kev lag luam thiab 2205 (S32205) tau dhau los ua cov qib duplex siv dav tshaj plaws. Qib 2205 muaj lub zog tawm los uas ntau dua ob npaug ntawm Hom 316 thiab pitting thiab crevice corrosion kuj zoo ib yam li Hom 904L austenitic stainless hlau. Cov ntawv thov rau cov qib txheem duplex suav nrog cov tso tsheb hlau luam, cov kav dej, cov txheej txheem nkoj thiab kev siv cov qauv.

Super Duplex Stainless Hlau
Lub super duplex stainless hlau feem ntau muaj 25% chromium, 3.5-4.0% molybdenum, thiab 0.25-0.27% nitrogen. Lub pitting thiab crevice corrosion kuj ntawm cov qib super duplex yog qhov tseem ceeb sib npaug rau 6% Mo super austenitic stainless hlau. Feem ntau siv super duplex stainless hlau qib yog 2507 (S32750) thiab Z100 (S32760) qib. Cov ntawv thov feem ntau suav nrog cov kav dej, cov khoom siv hluav taws xob, cov tso tsheb hlau luam, thiab cov txheej txheem cov nkoj siv rau kev ua tshuaj lom neeg thiab kev siv dej hiav txwv.

Hyper Duplex Stainless Hlau
Lub hyper duplex stainless hlau, S33207 thiab SAF S32707 yog cov feem ntau alloyed ntawm tsev neeg duplex thiab muaj 26-30% chromium, 3.5-5.0 % molybdenum, thiab 0.30-0.50% nitrogen. Cov qib hyper duplex yog tsim los rau kev nruj dua acid thiab chloride-muaj ib puag ncig. Lawv tau tsim nyob rau hauv tsawg qhov ntau thiab tam sim no tsuas yog muaj raws li seamless tubing.

Kev siv ntawm Duplex Stainless Hlau

Kev tsim cov ntawv
Duplex stainless hlau yog nyiam rau austenitic thiab ferritic stainless hlau rau kev tsim cov hlab ntsha uas muaj tshuaj dawb thiab lwm yam kua corrosive hauv ntawv ua.

Desalination
Desalination ntawm seawater, txheej txheem uas nthuav tawm cov tshuaj chlorine siab heev nyob rau hauv ib puag ncig kub, yog ib qho kev sim ruaj khov rau cov khoom siv corrosion-resistant. Duplex stainless hlau tau dhau los ua cov khoom ntawm kev xaiv rau kev tsim cov evaporators. Lawv kuj tuaj yeem ua nrog cov hlais nyias vim tias muaj zog dua thiab corrosion kuj ntawm duplex stainless hlau.

Roj thiab Roj

Txoj kev loj hlob ntawm duplex stainless hlau nrog PRE cov lej saum toj 40 tau ua rau nws muaj peev xwm tsim cov khoom xws li twj, kav dej thiab manifolds uas yuav tsum tau muaj kev tiv thaiv siab rau pitting thiab crevice corrosion, uas yog qhov tseem ceeb hauv kev lag luam roj thiab roj.

Kev tsim kho

Duplex stainless hlau yog siv nyob rau hauv kev tsim kho ntawm load-bearing cov tswv cuab uas kuj yuav tsum tau corrosion kuj. Cov ntawv thov ib txwm muaj xws li kev tsim cov choj hla dej hiav txwv lossis cov qauv uas nyob ze rau hauv hiav txwv.

Khoom noj khoom haus thiab dej haus cia

Lean duplex steels qhia cov lus cog tseg hauv kev lag luam cia khoom noj thiab dej qab zib thaum ua haujlwm vim lawv tus nqi qis thaum khaws cov kev tiv thaiv corrosion zoo thiab lub zog.

Txheej txheem ntawm Duplex Stainless Hlau

Kub Rolled
Kub dov yog ib txoj hauv kev siv los ua cov hlau duplex rau hauv ntau yam duab, xws li: daim hlau, nplooj ntawv, thiab tuav. Cov khoom yog rhuab thiab dhau los ntawm rollers kom ua tiav cov duab thiab qhov ntev. Kub dov duplex steel yog tus yam ntxwv los ntawm kev txhim kho txhua yam khoom.

Annealed
Annealing yog txheej txheem kev kho cua sov uas muaj cov cua sov duplex steel rau qhov kub thiab txias thiab maj mam txias nws kom txo tau kev ntxhov siab thiab txhim kho nws cov ductility. Annealed duplex steel yog ntau malleable thiab haum rau kev tsim thiab machining.

Txias-Drawn
Kev kos duab txias yog txheej txheem ua haujlwm txias uas cuam tshuam nrog rub cov hlau duplex los ntawm kev tuag kom txo nws txoj kab uas hla lossis ua tiav cov duab tshwj xeeb. Cold-drawn duplex steel paub txog nws qhov kev txhim kho saum npoo tiav thiab qhov tseeb qhov tseeb, ua rau nws tsim nyog rau kev siv precision.

Koj Yuav Tswj Duplex Stainless Hlau Li Cas?

Kev tu thiab tu kom zoo
Cov kauj ruam tseem ceeb tshaj plaws hauv kev tswj xyuas cov hlau zoo yog los xyuas kom meej nws cov kev tu kom zoo. Qhov no suav nrog tshem tawm cov av, khib nyiab, lossis xeb uas muaj nyob ntawm qhov chaw. Kev ntxuav yuav tsum tau ua nrog cov tshuaj ntxuav me me, dej sov, thiab cov ntaub mos muag lossis txhuam. Tom qab ntxuav, nws yog ib qho tseem ceeb kom qhuav qhov chaw.

Tsis txhob Abrasive Cleaners
Kev siv cov tshuaj ntxuav abrasive yuav tsum raug zam vim tias lawv tuaj yeem ua rau khawb thiab lwm yam kev puas tsuaj rau saum npoo ntawm duplex steel, ua rau muaj kev puas tsuaj rau lub sijhawm.

Tiv thaiv xeb
Kev xeb tuaj yeem yog qhov teeb meem loj rau duplex stainless hlau. Txhawm rau tiv thaiv nws, khaws cov hlau kom qhuav thiab huv si. Tsis tas li ntawd, siv cov txheej tiv thaiv xws li cov xim pleev xim lossis cov roj tshwj xeeb los tiv thaiv cov hlau los ntawm ya raws thiab lwm yam corrosive.

Khaws Cia txias
Thaum tshav kub kub tuaj yeem ua rau muaj kev puas tsuaj, yog li nws yog ib qho tseem ceeb kom khaws cov hlau duplex kom deb ntawm qhov kub thiab txias. Yog tias tsim nyog, siv cov ntaub ntawv insulating kom ntseeg tau tias cov hlau tseem txias.

Siv Cov Cuab Yeej Zoo
Thaum tuav duplex steel, nco ntsoov siv cov cuab yeej tshwj xeeb tsim rau stainless hlau kom tsis txhob muaj kev puas tsuaj.

Khaws cia kom zoo
Kev khaws cia kom zoo yog qhov tseem ceeb los tiv thaiv qhov zoo ntawm cov hlau. Khaws rau hauv qhov chaw qhuav, huv si kom deb ntawm qhov kub thiab txias. Tsis tas li ntawd, tsis txhob sib cuag nrog lwm cov hlau los yog cov khoom corrosive uas yuav ua rau cov hlau puas.

Kev tshuaj xyuas tsis tu ncua
Kev tshuaj xyuas cov hlau tsis tu ncua rau cov cim ntawm kev hnav thiab tsim kua muag. Nrhiav ib qho kev qhia ntawm xeb lossis lwm yam kev puas tsuaj uas tuaj yeem cuam tshuam nws qhov zoo. Kho tej kev puas tsuaj los yog hloov cov hlau, yog tias tsim nyog.

Peb Daim Ntawv Pov Thawj

Nws cov yeeb nkab stainless hlau ntau lawm tshuab tau mus txog lub ntiaj teb cov txheej txheem nruab nrab. Nws tau raug lees paub los ntawm ntau lub tuam txhab ua haujlwm thiab tau dhau los ua lub hnub qub lag luam hauv Asia.

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Peb Qhov Kev Pabcuam

Pawg ua raws li txoj cai ntawm "ib-nres kev pabcuam, ua kev xaiv yooj yim dua". Txuas ntxiv kom tau raws li qhov xav tau sib txawv ntawm cov neeg siv khoom thoob ntiaj teb hauv thaj chaw ntawm lub ntiaj teb cov khoom siv hlau. Pab pawg muag khoom tshaj lij muab cov neeg siv khoom nrog cov kev pabcuam thawj zaug. Ib pawg neeg yuav khoom nruj heev thiab kev tshuaj xyuas zoo xaiv cov khoom siv raw khoom zoo. Pab pawg xa khoom thiab kev xa khoom tuaj yeem ua kom muaj kev tiv thaiv kev thauj khoom.

Tiv tauj peb

sau ntawv rau peb

Email: ss@gneesteel.com

tuaj xyuas peb

Chaw nyob: Tsis yog.4-1114, Beichen Building, Beicang Town, Beichen District, Tianjin, Suav

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Cov lus nug nquag

Q: Dab tsi yog kev siv ntawm Duplex Stainless Hlau?

A: Vim lawv cov corrosion kuj zoo heev, muaj zog ntxiv, thiab tus nqi pheej yig, duplex stainless hlau yog nrov nyob rau hauv ntau yam kev lag luam thiab kev lag luam, xws li:

Offshore thiab ze ntug dej ua haujlwm xws li roj drilling, desalination, dej kho, thiab lwm yam kev lag luam.

Tshuaj thiab ua kua.

Naval qhov chaw thiab cov khoom siv.

Cov khoom siv tswj cov pa phem.

Pulp thiab ntawv ntau lawm.

Kev tsim kho.

Cov dej kub thiab brewing tanks.

Q: Dab tsi yog Duplex Stainless Hlau?

A: Duplex stainless hlau yog cov tsis tshua muaj corrosion resistant, ua hauj lwm hardenable alloys. Duplex stainless hlau phaj muaj cov qib siab ntawm chromium (nruab nrab ntawm 18% thiab 28%) thiab qis rau nruab nrab cov nyiaj npib tsib xee (nruab nrab ntawm 1.5% thiab 8%). Lub siab corrosion kuj thiab zoo heev mechanical zog ntawm duplex stainless steels yuav ntaus nqi rau lawv cov tshuaj muaj pes tsawg leeg thiab balanced (duplex) microstructure ntawm kwv yees li sib npaug ntim feem pua ntawm ferrite thiab austenite. Vim tias qhov xwm txheej duplex no, nws yuav nthuav tawm cov yam ntxwv ntawm ob qho tib si austenitic thiab ferritic stainless hlau. Duplex stainless hlau yog feem ntau, tawv dua ferritic stainless hlau. Lub zog ntawm duplex stainless hlau tuaj yeem nyob rau qee kis yog ob npaug rau austenitic stainless hlau.

Q: Koj yuav tsum xyuam xim rau dab tsi nrog Duplex Stainless Hlau?

A: Duplex stainless hlau kuj tseem tuaj yeem tsim ntau theem tsis xav tau yog tias cov hlau tsis tau muab qhov tseeb, tshwj xeeb hauv kev kho cua sov. Cov theem zoo li sigma theem ua rau embrittlement, lub ntsiab lus poob ntawm kev cuam tshuam toughness, tab sis sigma theem kuj txo corrosion kuj.

Kev tsim cov theem ntawm sigma feem ntau yuav tshwm sim thaum qhov cua txias thaum lub sij hawm tsim khoom lossis vuam tsis nrawm txaus. Qhov ntau alloyed cov hlau, qhov ntau dua qhov tshwm sim ntawm sigma theem tsim. Yog li ntawd, super duplex stainless hlau yog feem ntau ua rau qhov teeb meem no. Lwm daim ntawv ntawm embrittlement tshwm sim saum 475 degree, thiab nws tseem tuaj yeem tsim ntawm qhov kub thiab txias li 300 degree. Qhov no ua rau cov kev txwv tsim ntawm qhov siab tshaj plaws kev pabcuam kub rau duplex stainless hlau.

Q: Dab tsi yog cov khoom ntawm Duplex Stainless Hlau?

A: Zoo weldability

Duplex stainless hlau qib feem ntau muaj qhov zoo weldability thiab lawv tuaj yeem welded siv feem ntau ntawm cov vuam txoj kev siv rau austenitic stainless hlau:

Shielded hlau arc vuam (SMAW).

Gas tungsten arc vuam TIG (GTAW).

Gas hlau arc vuam MIG (GMAW).

Flux-cored arc vuam (FCW).

Plasma arc vuam (PAW).

Submerged arc vuam (SAW).

Laser vuam.

Kuj welding.

High-frequency vuam.

Superior corrosion kuj.

Duplex stainless hlau qib yog superior rau tus qauv austenitics hais txog kev ntxhov siab corrosion cracking kuj. Lawv kuj zoo nyob rau hauv ib tug xov tooj ntawm acidic thiab alkaline ib puag ncig.

Outokumpu's duplex muab yog ib qho tshwj xeeb: rau qib austenitic stainless hlau muaj cov duplex counterpart uas tsis tsuas yog muab cov kev tiv thaiv corrosion zoo sib xws tab sis kuj yog ob zaug lub zog.

Q: Dab tsi yog qhov txawv ntawm stainless hlau thiab duplex stainless hlau?

A: Cov hlau tsis muaj hlau suav nrog ntau chav kawm ntawm cov alloys raws li lawv cov crystalline microstructure. Ib qho kev faib tawm yog qhov sib txawv duplex. Plaub chav kawm tseem ceeb ntawm stainless hlau muaj xws li austenitic, ferritic, martensitic thiab duplex. Thaum austenitic stainless hlau muaj FCC microstructure, ferritic chav kawm muaj BCC qauv, martensitic muaj lub cev-centered tetragonal daim ntawv crystalline microstructure. Ntawm qhov tod tes, lub microstructure ntawm duplex stainless hlau alloy muaj xws li ob qho tib si austenite thiab ferrite nyob rau hauv ib tug 50% piv, uas yog dab tsi muab cov steels lawv tshwj xeeb mechanical thiab corrosion kuj zog.

Galvanic corrosion ntawm stainless hlau thiab duplex stainless hlau

bimetallic corrosion, los yog lwm yam hu ua galvanic corrosion yog ib tug electrochemical txheej txheem uas tshwm sim thaum ob dissimilar hlau yog submerged nyob rau hauv ib tug conductive tov thiab cov hlau yog hluav taws xob txuas. Hauv cov txheej txheem no, thaum ib qho hlau tiv thaiv, lwm tus tau corroded. Nws muaj peev xwm tiv thaiv galvanic corrosion los ntawm kev xyaum ntau txoj cai. Cov ntaub ntawv uas muaj peev xwm corrosion zoo sib xws yuav tsum raug xaiv, kev sib txuas hluav taws xob yuav tsum tau tawg, los ntawm kev rwb thaiv tsev, thiab qhov kawg, kev siv cov txheej rau ob qho tib si cov ntaub ntawv. Daim ntawv thov txheej txheej zoo tiv thaiv kev tshem tawm cov hlau los ntawm cov cathode lossis anode, yog li txhim kho lawv cov kev tiv thaiv corrosion thiab zoo tiv thaiv ob qho tib si hlau.

Pickling thiab passivation ntawm duplex thiab stainless hlau

Passivation yog qhov tshwm sim uas tshwm sim hauv cov hlau tsis muaj hlau uas muaj cov ntsiab lus siab dua ntawm chromium hauv lawv cov hlau. Duplex steels muaj chromium li ntawm 19% txog 32% hauv lawv cov alloys. Txij li thaum duplex stainless hlau muaj cov qib siab ntawm chromium hauv lawv cov hlau, nws muaj peev xwm ua tau rau saum npoo ntawm cov khoom no los tsim cov txheej txheem oxide passivated saum npoo ntawm cov hlau. Txawm li cas los xij, qee cov hlau tsis muaj hlau tsis muaj cov ntsiab lus chromium tsis txaus los tsim qhov kev kho tus kheej ntawm cov txheej txheem passivation oxide, ua rau cov khoom tau corroded los ntawm oxidation. Oxidation yog ib qho teeb meem tshwm sim nrog tsawg chromium stainless hlau. Nws yog ua tau los txhim kho corrosion kuj zog ntawm cov stainless hlau alloys los ntawm kev muab lawv mus rau ib tug passivation kev kho mob.

Pickling yog tshem tawm cov nplai uas tshwm sim los ntawm kev nthuav tawm cov khoom mus rau qhov kub siab. Cov nplais uas tau tshwm sim los ntawm ib qho chromium txheej ntawm cov hlau uas nyob ib sab tuaj yeem raug tshem tawm los ntawm pickling los ntawm kev siv tshuaj kho mob los ntawm lub cev sab nraud ntawm stainless hlau alloys. Kev siv cov txheej txheem siv tshuab feem ntau ua rau muaj kev puas tsuaj los yog ua rau cov hlau puas. Txhawm rau kom tsis txhob muaj kev raug mob zoo li no, nws yooj yim dua los tshem tawm cov hlau ntau dhau los ntawm kev siv tshuaj ntxuav, vim lawv tshem tawm cov txheej txheem ntxiv los ntawm cov hlau tsis huv. Cov txheej txheem no ua rau siv cov tshuaj acidic xws li nitric (HNO3) thiab hydrofluoric (HF) acids

Qhov zoo thiab qhov tsis zoo ntawm duplex thiab stainless hlau

Txij li thaum muaj ntau qib ntawm duplex thiab stainless hlau qib, qhov zoo, thiab qhov tsis zoo cuam tshuam nrog txhua qib yog nyob ntawm daim ntawv thov nws yuav tsum tau siv nrog rau cov tshuaj muaj pes tsawg leeg ntawm qib. Piv txwv li, austenitic stainless hlau qib 300 series muaj ductility zoo, txhim khu kev tiv thaiv corrosion, thiab zoo mechanical zog. Lawv cov chemistry tuaj yeem hloov pauv los ntawm kev txo qis lossis nce cov ntsiab lus ntawm cov pa roj carbon monoxide rau cov hom phiaj tshwj xeeb xws li vuam lossis siv hauv qhov kub siab. Cov hlau tsis muaj steel uas muaj nyob rau hauv cov chav kawm martensitic thiab ferritic muaj hardness zoo dua, thiab cov khoom tiv thaiv corrosion yog qis dua piv rau austenitic thiab duplex ntau yam ntawm stainless hlau. Vim tias duplex stainless hlau yog alloyed heev, tus nqi ntawm kev siv cov hlau no yuav siab heev. Txawm li cas los xij, tus nqi ntawm cov qib zoo li 904L yog siab dua qee cov qauv duplex stainless hlau. Ib cag ntawm tus nqi tsim nyog, muaj tsawg heev stainless hlau alloys uas yuav siv tau ntawm qhov kub thiab txias, tsis zoo li npib tsib xee alloys xws li Monel, Inconel, thiab lwm yam. Lwm qhov tsis zoo ntawm cov alloys yog lawv cov kev cuam tshuam, uas tsis zoo heev ntawm qhov kub thiab txias. qis li -50 degree .

Q: Duplex Steel Ua li cas?

A: Kev tsim cov duplex stainless hlau yog txheej txheem ntau yam ntawm steelmaking thiab sib sau. Nws pib nrog kev sib xyaw ntawm cov khoom siv raw uas muaj: npib tsib xee, hlau ore, chromium, molybdenum, thiab lwm yam alloying ntsiab nyob rau hauv ib tug hluav taws xob arc rauv, uas lawv yog melted thiab tov ua ke. Cov hlau melted no tau hloov mus rau argon oxygen decarburization (AOD) converter, nyob rau hauv uas cov txheej txheem metallurgical tseem ceeb tshwm sim. Nyob rau hauv AOD converter, gasses raug tshem tawm los ntawm cov hlau molten, thiab qhov kawg muaj pes tsawg leeg yog kho los ntawm kev ntxiv alloying ntsiab. Tom qab ntawd, cov hlau raug xa mus rau lub cub tawg, kom cov kev hloov kho tuaj yeem ua rau nws suav nrog.

Thaum cov hlau molten tau npaj, nws tuaj yeem muab pov rau hauv cov cam khwb cia tsis tu ncua lossis cov khoom ntim khoom. Lub molten sib tov ntawm duplex steel pib solidifies raws li ib tug kiag li ferritic khoom. Txawm li cas los xij, raws li nws txias rau chav tsev kub, kwv yees li ib nrab ntawm cov khoom siv los ntawm kev hloov pauv ntawm ferritic mus rau austenitic.

Cov paj ntoo lossis cov ingots no tau ua tiav ntxiv, feem ntau los ntawm kev rov ua kom sov thiab forging los yog dov kom ua tiav txoj kab uas hla. Tom qab ntawd, kev daws teeb meem annealing, txheej txheem kev kho cua sov, yog siv los xyuas kom meej qhov sib xws ntawm qhov bar lub sab hauv cov qauv. Tom qab annealing, cov tuav yog quenched kom ua tiav cov khoom xav tau. Thaum kawg, txhawm rau muab qhov zoo ib yam ua tiav, cov tuav tau siv cov tshuab tev tawm kom tshem tawm qhov tsis sib xws, ua rau cov khoom tiav duplex stainless hlau.

Q: Cov ntsiab lus carbon ntawm Duplex Steel yog dab tsi?

A: Cov ntsiab lus carbon ntawm duplex steel feem ntau yog qis dua 0.04%. Cov ntsiab lus chromium (Cr) thiab npib tsib xee (Ni) tuaj yeem hloov kho hauv thaj tsam ntawm 20% txog 30% thiab qis dua 9.5%, feem. Duplex stainless hlau kuj tseem muaj cov khoom me me xws li: molybdenum, nitrogen, tungsten, thiab tooj liab.

Q: Dab tsi yog Cov Hom Phiaj Ntawm Duplex Steel Khoom?

A: Duplex steel muaj nyob rau hauv ntau hom kom tau raws li ntau haiv neeg kev lag luam thiab engineering xav tau xws li:

Fittings thiab Flanges

Duplex steel fittings thiab flanges yog cov khoom tseem ceeb hauv cov kav dej, muab kev sib txuas ruaj khov uas tuaj yeem tiv taus ib puag ncig hnyav. Lawv cov kev tiv thaiv corrosion thiab lub zog ua rau lawv tsim nyog rau kev siv hauv kev lag luam xws li: roj & roj, kev ua tshuaj lom neeg, thiab marine engineering.

Yeeb

Duplex steel kav yog dav siv rau conveying kua thiab gasses nyob rau hauv xav tau chaw. Lawv muaj kev tiv thaiv zoo tshaj rau corrosion, ua rau lawv zoo tagnrho rau kev thauj khoom corrosive hauv kev lag luam xws li: petrochemicals, pulp thiab ntawv, thiab desalination.

Phaj

Duplex steel daim hlau yog tiaj tus, cov nplooj ntawv dav ntawm cov khoom siv uas pom cov ntawv thov hauv cov qauv tsim thiab kev lag luam. Lawv lub zog siab thiab kev tiv thaiv corrosion ua rau lawv muaj txiaj ntsig rau kev tsim cov hlab ntsha siab, lub tank cia, thiab ntau yam khoom siv.

Daim ntawv

Duplex steel ntawv yog nyias dua li daim hlau thiab feem ntau siv rau hauv daim ntawv thov uas yuav tsum tau hnav tsis tau cov ntaub ntawv siv tau ntev. Lawv feem ntau ua hauj lwm hauv architectural cladding, khoom siv hauv chav ua noj, thiab cov vaj huam sib luag zoo nkauj.

Tube

Duplex steel raj yog siv rau kev xa cov kua los yog gasses, tshwj xeeb tshaj yog nyob rau hauv cov xwm txheej uas corrosion kuj tseem ceeb heev. Lawv yog ib qho tseem ceeb hauv kev lag luam xws li: kev ua tshuaj lom neeg, kev lag luam tawm sab nraud, thiab kev tsim hluav taws xob hloov hluav taws xob.

Bar

Duplex steel tuav tuaj nyob rau hauv ntau yam duab, xws li: puag ncig, square, thiab hexagonal, thiab yog siv nyob rau hauv daim ntawv thov xws li: shafts, fasteners, thiab li qub. Lawv kev sib xyaw ua ke ntawm lub zog thiab kev tiv thaiv corrosion ua rau lawv muaj ntau yam hauv kev siv tshuab thiab kev lag luam.

Q: Dab tsi yog qhov zoo ntawm kev siv Duplex Steel?

A: Duplex stainless hlau muaj ntau qhov zoo piv rau cov qib austenitic thiab ferritic stainless hlau. Cov no yog:

Feem ntau nthuav tawm mus txog ob zaug lub zog ntawm ob qho tib si austenitic thiab ferritic stainless hlau qib.

Impressive formability nyob rau hauv siab, tshaj ntawm cov qib ferritic, thiab muaj superior toughness.

Nyob ntawm cov qib tshwj xeeb, duplex stainless hlau muab piv lossis txawm tias zoo dua corrosion kuj thaum piv rau cov qib austenitic. Alloys nrog qib siab ntawm nitrogen, molybdenum, thiab chromium muaj qhov ua tau zoo heev rau kev xeb thiab chloride pitting.

Muab cov khoom zoo tshaj plaws thaum piv rau ferritic stainless hlau, tshwj xeeb tshaj yog nyob rau hauv cov ntsiab lus ntawm cov yas toughness.

Cov khoom pov thawj tau txhim kho kev ua haujlwm txias thiab txias-tsim peev xwm piv rau ferritic stainless hlau.

Feem ntau, tsis muaj preheating los yog tom qab-weld kev kho cua sov yog yuav tsum tau, simplifying lub vuam txheej txheem.

Lub versatility ntawm duplex stainless hlau txuas mus rau ntau yam kev siv piv rau ferritic stainless hlau.

Q: Qhov txawv ntawm Duplex Steel thiab 304 Stainless Hlau yog dab tsi?

A: Duplex stainless hlau, tshwj xeeb tshaj yog duplex 2205 stainless hlau, sawv sib nrug ntawm austenitic 304 stainless hlau feem ntau hauv peb qhov tseem ceeb. Ua ntej, nws lub zog tawm los yog qhov tseem ceeb siab dua - ntau dua ob npaug ntawm cov hlau tsis tu ncua austenitic. Lub zog siab no tso cai rau kev tsim kho cov tank cia thiab cov hlab ntsha siab nrog cov phab ntsa nyias, thaum kawg txo cov nqi khoom. Qhov thib ob, nws khav theeb tshwj xeeb rau kev ntxhov siab corrosion cracking, tshaj lub peev xwm ntawm austenitic stainless hlau hauv qhov no. Thaum kawg, nws cov khoom siv kho tshuab tau zoo dua, nrog lub peev xwm los nqus ntau lub zog nyob rau hauv qhov chaw thau khoom dynamic lossis zoo li qub, ua rau nws muaj zog dua nyob rau hauv cov xwm txheej uas muaj xwm txheej ceev xws li kev sib tsoo lossis tawg.

Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tau xav txog qee qhov kev tsis zoo thaum muab piv rau duplex stainless hlau rau austenitic stainless hlau. Duplex steel muaj kev txwv ntau yam hauv kev siv, yuav tsum tau tswj qhov kub thiab txias hauv qab 250 degree. Nws cov yas toughness qis dua, ua rau tsis zoo rau kev ua haujlwm txias thiab kub thiab ua haujlwm zoo piv rau austenitic stainless hlau. Tsis tas li ntawd, nws muaj qhov nruab nrab qhov kub thiab txias, yuav tsum muaj kev tswj xyuas nruj hauv kev kho cua sov thiab cov txheej txheem vuam kom tsis txhob muaj kev puas tsuaj rau theem tsim thiab kev ua haujlwm tsis zoo.

Q: Qhov txawv ntawm Duplex Steel thiab 316 Stainless Hlau yog dab tsi?

A: Qhov sib txawv tseem ceeb ntawm duplex thiab 316 stainless hlau yog nyob rau hauv lawv cov muaj pes tsawg leeg. Duplex stainless hlau muaj ntau chromium, molybdenum, thiab nitrogen, ua rau nws muaj zog thiab corrosion-resistant ntawm kub dua. Thaum 316 stainless hlau nthuav tawm cov kev tiv thaiv zoo heev rau corrosive ib puag ncig hauv 300 tsev neeg, duplex stainless hlau muaj kev tiv thaiv ntau dua rau corrosive pitting, tshwj xeeb tshaj yog thaum muaj cov tshuaj chloride. Duplex steel kuj yog ntau dua ductile, tso cai rau kev ua haujlwm nyuaj.

Nyob rau hauv cov nqe lus ntawm lub zog thiab durability, duplex steel outperforms 316, vim nws tsis kam mus rau ntau yam corrosive ib puag ncig. Nws yog qhov zoo tagnrho rau cov ntawv thov kev ntxhov siab xws li li qub thiab cov twj tso kua mis uas xav tau lub neej ntev.

Q: Qhov txawv ntawm Duplex Steel thiab 201 Stainless Hlau yog dab tsi?

A: Duplex steel thiab 201 stainless hlau muaj qhov sib txawv ntawm qhov sib txawv, cov khoom, thiab kev siv. Duplex stainless hlau yog tus yam ntxwv los ntawm nws ob theem microstructure, muaj ob qho tib si austenitic thiab ferritic theem, feem ntau nyob rau hauv ib tug 50-50 piv. Nws muaj cov qib siab ntawm chromium, npib tsib xee, molybdenum, thiab nitrogen, muab kev tiv thaiv corrosion tshwj xeeb, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig uas muaj chloride nplua nuj, thiab cov khoom siv zoo tshaj plaws, suav nrog lub zog thiab tawv. Yog li ntawd, cov hlau duplex pom nws cov niche hauv kev thov xws li: kev ua tshuaj lom neeg, ib puag ncig hauv hiav txwv, thiab cov khoom siv hauv cov khoom uas muaj kev tiv thaiv corrosion thiab lub zog tseem ceeb.

Nyob rau hauv sib piv, 201 stainless hlau yog austenitic stainless hlau nrog ib tug yooj yim alloy muaj pes tsawg leeg, feem ntau muaj hlau, chromium, thiab npib tsib xee. Thaum nws muaj kev ua haujlwm zoo corrosion, nws tsis haum rau corrosion kuj thiab txhua yam khoom ntawm duplex stainless hlau. Raws li qhov tshwm sim, 201 stainless hlau feem ntau yog siv rau hauv cov ntawv thov tsawg dua, suav nrog: cov khoom siv hauv chav ua noj, cookware, cov tais diav, thiab cov khoom siv kho kom zoo nkauj, uas yuav tsum muaj kev tiv thaiv corrosion thiab cov khoom siv dag zog tsawg dua.

Q: Vim li cas nitrogen ntxiv rau Duplex Stainless Steel?

A: Austenite Stabilization: Nitrogen yog ib qho kev sib xyaw ua ke uas pab tswj cov theem austenite hauv duplex stainless hlau. Piv rau ferrite ib leeg, theem no txhim kho lub zog, toughness, thiab corrosion kuj.

Corrosion Resistance: Nitrogen txhim khu kev tiv thaiv ntawm duplex stainless hlau rau ntau hom kev xeb, xws li pitting thiab crevice corrosion. Nitrogen txhawb kev tsim ntawm stainless hlau lub npe nrov passive tiv thaiv zaj duab xis nyob rau saum npoo, uas pab tiv thaiv tawm tsam los ntawm corrosive ib puag ncig.

Lub zog thiab Toughness: Nitrogen ntxiv dag zog rau cov hlau matrix los ntawm cov khoom siv ntxiv dag zog, uas txhim kho cov khoom siv ntawm duplex stainless hlau. Nws txhim kho cov khoom siv lub zog, lub zog tensile, thiab cuam tshuam toughness, ua rau nws tsim nyog rau kev thov cov qauv siv.

Tus nqi-zoo ntxiv: Nitrogen alloying muab cov txiaj ntsig zoo rau kev ua kom cov hlau ua tau zoo piv rau lwm cov khoom siv hlau xws li npib tsib xee lossis molybdenum. Nws tso cai rau cov foundries los tsim cov alloys nrog cov khoom tsim nyog yam tsis muaj kev nce nqi ntawm cov khoom siv.

Q: Dab tsi qib ntawm Duplex Stainless Steel nyob ntawd thiab lawv feem ntau siv qhov twg?

A: 2205 (UNS S32205 / S31803)

Qib no tau paub txog kev ua haujlwm zoo corrosion, muab kev ua tau zoo rau 316L hauv ntau qhov chaw.

Nws cov chromium siab, molybdenum, thiab nitrogen cov ntsiab lus tiv thaiv pitting, crevice, thiab dav corrosion.

Txawm li cas los xij, nws tsis tsim nyog rau cov ntawv thov uas yuav tsum tau txuas ntxiv mus rau qhov kub siab tshaj 300 degree vim nag lossis daus ntawm brittle microstructures.

Cov ntawv thov ib txwm muaj xws li:

Kev ua tshuaj lom neeg, thauj, thiab khaws cia: Qib 2205 yog siv rau hauv cov hlab ntsha siab, tso tsheb hlau luam, cov kav dej, thiab cov khoom siv hluav taws xob hauv kev lag luam chemical.

Roj thiab roj kev tshawb nrhiav thiab kev ua haujlwm: Nws yog tsim rau offshore platforms, pipelines, thiab cov cuab yeej raug corrosive ib puag ncig hauv kev lag luam roj thiab roj.

Desalination nroj tsuag: Qib 2205 yog siv nyob rau hauv seawater desalination nroj tsuag vim nws tsis kam mus rau chloride corrosion.

Marine daim ntaub ntawv: Nws yog siv nyob rau hauv shipbuilding, offshore structures, thiab marine khoom. Nws yog siv nyob rau hauv shipbuilding, offshore structures, thiab marine khoom.

Pulp thiab ntawv kev lag luam: Qib 2205 yog siv rau hauv cov khoom siv pulp thiab ntawv, qhov twg corrosion kuj tseem ceeb heev.

2507 (UAS S32750)

Qib super duplex no muaj pitting siab heev thiab crevice corrosion kuj ua tsaug rau nws cov ntsiab lus molybdenum thiab chromium siab.

Nws muaj lub zog siab tab sis kuj tuaj yeem ua rau muaj kev cuam tshuam yog tias raug kub hnyiab rau lub sijhawm ntev.

Qib 2507 duplex stainless hlau yog nquag siv nyob rau hauv huab cua ib puag ncig xws li desalination nroj tsuag, seawater systems, thiab petrochemical industries.

Cov ntawv thov ib txwm muaj xws li:

Cov cuab yeej siv tshuaj: Qib 2507 yog tsim rau cov khoom siv hauv kev tsim thiab tuav cov tshuaj, acids, thiab cov kuab tshuaj.

Kev lag luam roj thiab roj: Nws yog siv nyob rau hauv offshore platforms, subsea khoom, thiab pipelines vim nws tsis kam mus corrosion nyob rau hauv seawater thiab hnyav ib puag ncig.

Desalination nroj tsuag: Lub alloy qhov corrosion kuj ua rau nws haum rau siv nyob rau hauv desalination nroj tsuag qhov twg nws los rau hauv kev sib cuag nrog chloride-nplua nuj seawater.

Pulp thiab ntawv kev lag luam: Qib 2507 yog siv rau hauv cov khoom siv xws li digesters, bleach washers, thiab evaporators vim nws tsis kam mus rau corrosive tshuaj siv nyob rau hauv cov txheej txheem papermaking.

LDX 2101 (UNS S32101)

Raws li ib tug lean duplex stainless hlau, LDX 2101 muaj zoo dav dav corrosion kuj, superior rau 304 tab sis tsis zoo li 316.

Nws yog tus cwj pwm los ntawm lub zog siab thiab ua haujlwm zoo rau kev ntxhov siab corrosion cracking.

Nws tsis tshua kim vim nws siv tsawg nickel thiab molybdenum tab sis tuaj yeem nyuaj rau qhov chaw nyob ntawm kev ua lag luam.

Cov ntawv thov uas muaj xws li:

Kev ua tshuaj lom neeg: LDX 2101's corrosion kuj ua rau nws haum rau cov khoom siv thiab cov khoom siv hauv cov chaw ua tshuaj.

Kev lag luam roj thiab roj: LDX 2101 tuaj yeem siv rau hauv kev lag luam tawm sab nrauv, cov kav dej, thiab lwm yam khoom siv uas raug cuam tshuam rau qhov chaw nyob hauv kev lag luam roj thiab roj.

Desalination nroj tsuag: LDX 2101 qhov kev tiv thaiv corrosion thiab chloride kev nyuaj siab-corrosion tawg ua rau nws tsim nyog rau desalination nroj tsuag qhov twg seawater ua tiav.

Kev ua zaub mov: LDX 2101's corrosion resistance thiab machinability zoo ua rau nws haum rau kev ua zaub mov thiab cov khoom cia.

Kev tsim kho: LDX 2101 tuaj yeem siv rau hauv cov qauv siv uas xav tau kev tiv thaiv corrosion, xws li txuas hniav thiab cov tsev.

2304 (UA)

Lwm cov lean duplex, 2304 muaj corrosion kuj zoo ib yam li 316L tab sis muaj zog dua.

Txawm li cas los xij, nws muaj kev cuam tshuam rau pitting corrosion nyob rau hauv ib puag ncig chloride nplua nuj.

Nws yog feem ntau siv hauv kev tsim kho, architecture, thiab hauv kev lag luam pulp thiab ntawv.

Qee cov ntawv thov tshwj xeeb tshwj xeeb suav nrog:

Kev Siv Tshuaj: Kev tsim kho cov tshuaj tankers, cov khoom thauj, thiab cov tso tsheb hlau luam vim yog qib 2304's corrosion resistance properties.

Kev lag luam roj thiab roj: Offshore platforms, pipelines, thiab subsea cov cuab yeej hauv kev lag luam roj thiab roj.

Pulp thiab ntawv kev lag luam: Kub exchangers, digesters thiab bleach towers, rov qab boilers, piping systems, thiab lwm yam khoom.

Kev tsim kho: Architectural structures thiab Cheebtsam, nrog rau facades, kab teeb, kab, trusses, handrails, hniav ntsiab, ru tsev, thiab cladding.

ZERON 100 (UNS S32760)

Zoo li 2507 (UNS S32750), qib super duplex no muaj qhov siab pitting thiab crevice corrosion kuj. Nws kuj tseem muab kev tiv thaiv zoo rau sulphide kev nyuaj siab corrosion cracking.

Txawm li cas los xij, zoo li lwm cov qib super duplex, nws raug rau embrittlement ntawm qhov kub thiab txias.

Cov ntawv thov ib txwm muaj xws li:

Kev lag luam roj thiab roj: Zeron 100 feem ntau yog siv nyob rau hauv offshore roj thiab roj ntau lawm, muab txhim khu kev qha corrosion kuj nyob rau hauv seawater thiab qaub roj ib puag ncig.

Kev ua tshuaj lom neeg: Nws yog siv rau hauv cov chaw ua tshuaj lom neeg thoob plaws hauv cov kav dej, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob thiab cov khoom siv, cov hlab ntsha siab, thiab cov khoom siv tshuaj.

Desalination nroj tsuag: Nws tuaj yeem tiv taus cov dej hiav txwv corrosive, ua rau nws zoo tagnrho rau kev siv cov khoom siv rov qab osmosis (RO), cov hlab ntsha muab tub lim, cov khoom siv sulphate tshem tawm, thiab cov khoom siv flue gas desulphurization (FGD).

Petrochemical, ntawv thiab pulp, thiab marine industries: Qib no feem ntau pom muaj nyob rau hauv tshav kub exchangers, siab hlab ntsha, thiab piping systems.

Q: Dab tsi yog txoj kev vuam ntawm Duplex Stainless Hlau?

A: Cov kws tshaj lij tuaj yeem vuam Duplex stainless hlau los yog duplex stainless hlau profiles siv cov txheej txheem vuam ntau rau cov hlau alloy. Nyob rau hauv ib tug muaj peev xwm nrhiav tau: submerged vuam, tungsten inert gas vuam, plasma vuam, nquag roj hlau arc vuam, laser vuam thiab electro-beam vuam. Cov txheej txheem txias tom qab vuam siv lub zog tseem ceeb hauv austenite-ferrite piv ntawm cov khoom ntawm chav tsev kub. Zoo li qhov no, kev ua kom txias qeeb ua rau muaj cov ntsiab lus austenite ntau dua thiab feem ntau ua rau cov ntsiab lus qis dua austenite. Kev xaiv ntawm cov txheej txheem vuam tsim nyog, raws li qhov tseeb seam geometry, ua kom yooj yim hauv kev kho qhov tseeb ntawm austenite-ferrite piv. Rau qhov teeb meem ntawd, nws yog ib qho tseem ceeb kom ntseeg tau tias qhov txias txias ntawm qhov kub ntawm 1.100 degrees Celsius thiab 1000 degrees Celsius. Lub vuam qhov kub yuav dhau los ntawm 950 txog 700 degrees Celsius hauv ob feeb, txhawm rau kom tsis txhob muaj nag lossis daus. Lub tshuab cua txias ceev yuav tsum tau khaws cia kom txog thaum qhov kub ntawm 300 degrees Celsius. Super Duplex kuj yog weldable zoo ib yam li cov hlau alloy siab, yog li muaj txiaj ntsig zoo.

Peb paub zoo tias yog ib qho ntawm cov khoom lag luam stainless hlau duplex nyob hauv Suav teb. Peb sov siab txais tos koj mus yuav los yog lag luam wholesale zoo duplex stainless hlau hauv Tshuag ntawm no thiab tau txais cov qauv dawb los ntawm peb lub hoobkas. Rau nqe kev sab laj, tiv tauj peb.