Duplex Stainless hlau Stainless (DSS) yog hom stainless hlau uas muaj kwv yees li ntawm kev sib npaug ntawm ferrite thiab austenite, nrog theem qis feem ntau ua tsawg kawg 30%. DSS feem ntau muaj cov ntsiab lus chromium nruab nrab ntawm 18% thiab 28% thiab cov ntsiab lus npib tsib ntawm 3% thiab 10%. Qee lub stuplex stainless hlau kuj muaj cov khoom siv xws li Molybdenum (mo), Tooj (NB), ti), thiab nitrogen (n).
Pawg ntawm cov hlau sib txuas ua ke cov yam ntxwv ntawm cov hlau Austenitic thiab Ferritic stainless hlau. Piv rau ferritic stainless hlau, DSS muaj ntau dua cov yas thiab tawv, tsis muaj chav kub ua kom sov, thiab qhia tau txhim kho kev txhim kho corrosion thiab weldability. Nyob rau tib lub sijhawm, nws khaws tau 475 ° C brittleness thiab siab thermal conductivity ntawm ferritic stainless hlau thiab cov khoom pov thawj superplasticity. Piv rau antenenitic stainless hlau, DSS muaj lub zog siab dua thiab muaj zog dua rau kev cuam tshuam hauv kev cuam tshuam thiab chloride kev ntxhov siab corrosion. DSS tseem muaj cov pitting zoo heev thiab yog suav hais tias yog npib npib npib npib tsib xee.
Tus qauv thiab hom
Vim nws cov qauv ntau theem ntawm Austenite thiab ferrite, nrog txhua qib suav nyiaj rau kwv yees li ib nrab, DSS ua rau pom cov yam ntxwv ntawm cov hlau hauv lub cev. Cov txiaj ntsig lub zog ntawm DSS ranges los ntawm 400 MPA rau 550 MPa, uas yog ob zaug uas muaj cov hlau tsis muaj txiaj ntsig. DSS muaj ntau dua cov tawv me me, txo qis kev hloov pauv kub, thiab cuam tshuam ntau hauv intergroranular corrosion tsis kam thiab weldability piv rau ferritic steels. Nws tseem khaws qee cov hlau ferritic stainless hlau, xws li 475 ° C brittleness, siab thermal nthuav tawm coefficiention, superplasticity, thiab Magnetism. Piv nrog usteneric stainless hlau, DSS muaj lub zog siab dua, thiab txhim kho kev ntxhov siab rau pitting, kev ntxhov siab corrosion, thiab corrosion qaug zog.
DSS tuaj yeem faib ua plaub yam raws li nws cov tshuaj muaj tshuaj lom neeg: CR18, CR23 (CR22, thiab CR25. Daim CR25 tuaj yeem muab faib ua ke ntxiv rau hauv cov qauv thiab super duplex stainless hlau. Ntawm cov no, CR22 thiab CR25 feem ntau siv. Nyob rau hauv Suav teb, feem ntau ntawm cov qeb tau txais yuav yog tsim nyob rau hauv Sweden, SAF2304 (SA22 hom), thiab SA2507 (CR25 hom).
Hom Duplex Stainless Hlau
1. Tsawg-alloy Hom:Sawv cev los ntawm undu S32304 (23cr-4ni-0.1n), cov hlau no tsis muaj Molybdenum thiab muaj kev xaiv tus lej sib npaug (PREN) ntawm 24-25. Nws tuaj yeem hloov AISI 304 lossis 316 hauv kev ntxhov siab corrosion tsis kam thov.
2. Nruab Nrab-Alloy Hom:Sawv cev los ntawm uns unical s31803 (22Ccr-5Ni-3mo-0.15n), nrog ib tug pren ntawm 32-33. Nws corrosion tsis kam yog nruab nrab ntawm Aisi 316L thiab 6% mo + n ustenitic stainless hlau.
3. High-alloy hom:Feem ntau muaj 25% cr nrog molybdenum thiab nitrogen, tej zaum tooj liab thiab tungsten. Sawv cev los ntawm UnR unic unic s32550 (25cr-6mo-2CU-2CU-2CU-2CU-2CU-2-39, cov hlau no muaj kev tiv thaiv zoo dua li 22% CR DSS.
4. Super Duplex Stainless Hlau:Muaj cov theem siab ntawm Molybdenum thiab nitrogen, sawv cev los ntawm unssh cov khoom siv thiab tooj liab, piv rau cov hlau ua kom zoo tshaj plaws.
Cov qib ntawm Duplex Stainless Hlau hauv Suav
Tus Qauv Suav Suav GB / T 20878-2007 "Stainless-Resistant steel menyuam yaus, xws li muaj pes tsawg tus qhab nia ua haujlwm, xws li muaj ntau cov qhab nia DSUs, xws li muaj ntau cov qhab nia DSUs, xws li ntau DSUs Tsis tas li ntawd, cov neeg paub zoo 2205 chav hlau duplex sib raug rau Suav qib 022cr23ni5mo3n.
Cov yam ntxwv ntawm Chav Hlau Stainless
Vim nws cov qauv siv roj ntxiv thiab theem kom zoo, DSS kev txhim kho kev ua kom sov Nws tau txais qhov zoo heev thiab weldability ntawm Anustenitic stainless hlau thiab lub siab muaj zog thiab Chloride kev ntseeg cuav cov hlau. Cov khoom zoo tshaj plaws tau ua DSS sai sai tsim kho cov khoom siv wardable txij li xyoo 1980, ua piv rau Martensitic, Austenitic, thiab Ferritic stainless hlau. DSS muaj cov yam ntxwv hauv qab no:
1. Chloride Kev ntxhov siab corrosion:Molybdenum-muaj cov DSS cov khoom pov thawj ua kom pom zoo rau cov tshuaj pleev chloride kev ntxhov siab ntawm cov qib kev ntxhov siab tsawg. Thaum lub sijhawm 18-8 Austenitic stainless hlau yog kev txom nyem los ntawm kev nyuaj siab corrosion incrosions saum toj no 60 ° suloride, ua rau nws haum rau kev hloov pauv cua sov thiab evaporators.
2. Pitting corrosion:DSS tau ua tiav zoo heev pen corrosion tsis kam. Nrog tib pitting tiv taus (pre = cr% + 3.3mo% + 16n%), DSS thiab Austenitic Stainless muaj cov peev xwm. DSS qhov pitting thiab corrosion corrosion tsis kam, tshwj xeeb hauv high-chromium, nitrogen-muaj hom, surpasses uas ntawm Aisi 316L.
3. Corrosion qaug zog thiab hnav corrosion tsis kam:DSS ua tau zoo nyob rau hauv qee thaj chaw corrosive, ua rau nws haum rau cov twj tso kua, li qub, thiab lwm yam khoom siv fais fab.
4. Cov Khoom Siv Neeg Kho Tshuab:DSS muaj lub zog siab thiab qaug zog, nrog cov txiaj ntsig lub zog ob zaug ntawm 18-8 Austenitic steels. Hauv kev hais daws lub xeev, nws elongation ncav 25%, thiab nws cov khoom siv tawv omk (v-notch) tshaj 100 J.
5. Weldability:DSS muaj qhov zoo weldability nrog tsawg kub crumming kev sib tsoo. Preheating feem ntau tsis tas yuav ua ntej vuam, thiab tom qab weld tshav kub kub yog tsis tsim nyog, tso cai rau vuam nrog 18-8 antenitic stainless hlau lossis cov hlau.
6. Kub Ua Haujlwm:Tsawg-chromium (18% cr) DSS muaj qhov kub kub ua hauj lwm ntau dua 18-8 Austenitic Stainless hlau, tso cai rau kev dov ncaj rau hauv cov hlau tsis forging. High-chromium (25% CR) DSS me ntsis ntau dua rau kev ua haujlwm kub tab sis tuaj yeem tsim mus rau hauv cov ntawv, kav hlau, thiab xaim.
7. Cov haujlwm txias:DSS cov khoom ua pov thawj ua haujlwm hnyav dua 18-8 Austenicic stainless hlau, xav tau siab dua thawj zaug kev ntxhov siab thaum lub raj thiab phaj sib.
8. Thermal conductivity thiab nthuav dav:DSS muaj ntau dua thermal conductivity thiab qis dua thermal nthuav coefficients piv rau antenitic stainless hlau, ua rau nws cov khoom tsim khoom sib xyaw. Nws tseem zoo tagnrho rau cov cua sov ua kom muaj zog nqus cov raj cores, nrog cov cua sov siab dua li cov hlau tsis huv.
9. Brittleness:DSS khaws cov brittleness zoo ntawm cov high-chromium ferritic stainless hlau thiab tsis haum rau kev siv nyob rau ntawm qhov kub tshaj 300 ° C. Qhov qis dua cov ntsiab lus chromium hauv DSS, qhov tsawg dua qub nws yog rau Cegittle Paim xws li Sigma theem.
Womic Hlau Kev Ua Tau Ntau Lawm
Cov haujlwm tawv hlau yog ib qho chaw tsim khoom ntawm cov hlau duplex, muab ntau cov khoom lag luam suav nrog cov kav dej, cov paib, kab hlau, thiab xaim. Peb cov khoom lag luam ua raws cov qauv loj thoob ntiaj teb thiab Iso, CE, thiab API ntawv pov thawj. Peb tuaj yeem haum rau peb tus neeg saib xyuas thib peb thiab kev kuaj xyuas zaum kawg, ua kom muaj kev soj ntsuam siab tshaj plaws tau ua tiav.
Puric Steel lub Duplex cov khoom lag luam yog paub rau lawv:
Cov Khoom Siv Zoo:Peb tsuas siv tsuas yog cov khoom siv raw tshaj plaws los xyuas kom meej cov khoom lag luam zoo tshaj.
Kev tsim kev lag luam tshaj:Peb lub xeev-ntawm-cov qauv-kos duab chaw tsim khoom lag luam thiab cov pab pawg kev paub ua rau peb los tsim cov qauv duplex uas muaj cov khoom siv tshuab hluav taws xob thiab cov kws kho mob.
Customizable daws:Peb muab ntau qhov ntau thiab tsawg thiab cov kev qhia tshwj xeeb kom tau raws li cov kev xav tau ntawm peb cov neeg siv khoom.
Kev tswj hwm nruj:Peb cov txheej txheem tswj hwm nruj ua kom ntseeg tau tias txhua cov khoom ua tau raws qib siab tshaj plaws ntawm kev ua tau zoo tshaj plaws.
Ntiaj teb ncav cuag:Nrog lub robust export network, womic steel txi cov hlau stainless hlau rau cov neeg lag luam thoob ntiaj teb, txhawb ntau yam kev lag luam uas muaj kev txhim khu kev qha thiab cov ntaub ntawv kev ua tau zoo.
Xaiv cov hlau hlau rau koj lub duplex stainless hlau xav tau thiab kev paub txog qhov tsis zoo thiab kev pabcuam uas teev peb nyob hauv kev lag luam.
Lub Sijhawm Post: Jul-29-2024