1. Qhov thib ob tiam ntawm duplex steel stainless hlau yeeb nkab muaj cov yam ntxwv ntawm ultra-low carbon, tsis tshua muaj nitrogen, raug muaj pes tsawg leeg Cr5% Ni0.17%n thiab 2205 siab nitrogen cov ntsiab lus tshaj thawj tiam ntawm duplex steel stainless hlau yeeb nkab, uas txhim kho qhov tsis kam rau kev ntxhov siab corrosion thiab pitting tsis kam ntawm acidic media nrog siab chloride ion concentration.Nitrogen yog ib qho muaj zog austenite tsim.Qhov sib ntxiv ntawm nitrogen hauv duplex stainless hlau tsis tsuas yog txhim kho cov yas thiab tawv ntawm cov hlau tsis muaj kev puas tsuaj, tab sis kuj txhim kho lub zog ntawm cov hlau, thiab inhibits nag lossis daus thiab qeeb ntawm carbides.
2. Lub koom haum muaj nuj nqi: Nyob rau hauv lub tsev xog paj, austenite thiab ferrite account rau txog ib nrab ntawm cov khoom tov, uas muaj cov yam ntxwv ntawm biphase qauv.Nws khaws cov yam ntxwv ntawm me me ntawm ferritic stainless hlau conductors, tsis kam rau pitting, cracking thiab chloride kev nyuaj siab corrosion, nrog zoo toughness, tsis tshua muaj embrittlement kub, tsis kam mus rau intergranular corrosion thiab mechanical zog thiab zoo weldability.
3. Nyob rau hauv tib lub siab cov ntaub ntawv yuav txuag tau cov ntaub ntawv, lub zog tawm los thiab kev nyuaj siab corrosion kuj ntawm duplex steel stainless hlau yeeb nkab yog yuav luag 1 npaug ntawm austenitic stainless hlau, cov linear expansion coefficient yog tsawg dua austenitic stainless hlau ntawm austenitic stainless hlau. steel system, thiab cov pa roj carbon tsawg yog nyob ze rau nws.Txias forging tsis zoo li austenitic stainless hlau.
4. Weldability: duplex steel stainless hlau yeeb nkab 2205 muaj qhov zoo weldability, vuam txias, kub tawg rhiab heev yog me me, feem ntau tsis muaj preheating ua ntej vuam, tsis muaj kev kho cua sov tom qab vuam.Vim yog qhov me me ntawm ib-theem ferrite thiab siab nitrogen cov ntsiab lus nyob rau hauv lub tshav kub cuam tshuam cheeb tsam, lub vuam hlau lub zog tuaj yeem tswj tau lub sijhawm no thaum cov khoom siv vuam raug xaiv tsim nyog, thiab kev ua tiav zoo.
5. Kub tawg: Qhov rhiab heev ntawm kub tawg yog tsawg dua li ntawm austenitic stainless hlau.Qhov no yog vim hais tias cov ntsiab lus npib tsib xee tsis siab, cov impurities uas yooj yim rau kev ua kom qis-melting eutectic yog tsawg, cov kua zaj duab xis uas tsis tshua muaj melting point tsis yooj yim los tsim, thiab kev loj hlob sai ntawm grain txaus ntshai tsis muaj nyob rau hauv siab. kub.
6. Brittleness ntawm tshav kub cuam tshuam cheeb tsam: Qhov teeb meem tseem ceeb ntawm vuam ntawm duplex steel stainless hlau yeeb nkab yog lub tshav kub cuam tshuam cheeb tsam.Vim tias qhov ua kom txias sai sai ntawm thaj chaw tshav kub nyob rau hauv lub xeev tsis sib npaug ntawm lub voj voog vuam, ntau qhov txias ferrite yeej ib txwm khaws cia, uas yuav ua rau kom muaj kev cuam tshuam ntawm corrosion thiab hydrogen-induced cracking.
7. Vuam metallurgy: Thaum lub sij hawm vuam txheej txheem ntawm duplex stainless hlau, nyob rau hauv qhov kev txiav txim ntawm thermal cycling, lub microstructure thiab tshav kub-cuam tshuam cheeb tsam ntawm weld hlau tau undergone ib tug series ntawm kev hloov.Thaum kub kub, lub microstructure ntawm duplex stainless hlau yog precipitated los ntawm ferrite thiab austenite thaum txias.Tus nqi ntawm austenite nag lossis daus yog cuam tshuam los ntawm ntau yam.
Post lub sij hawm: Jun-26-2023