Duplex steels 1.4462, 1.4410, 1.4501 thiab 1.4507 yog dab tsi?
Dual-theem steel yog cov khoom siv hlau ua haujlwm siab uas tau tshwm sim tam sim ntawd hauv cov khoom siv hlau hauv xyoo tas los no. Nws tau siv dav hauv ntau qhov chaw xws li tsheb, roj av, tshuaj lom neeg, thiab hluav taws xob vim nws qhov tshwj xeeb microstructure thiab cov cuab yeej zoo heev. Nyob rau hauv lub tsev neeg duplex steel, plaub alloys, 1.4462, 1.4410, 1.4501 thiab 1.4507, tau nyiam ntau xim vim lawv lub zog siab, hardness thiab corrosion kuj.
1.4462 duplex hlau, tseem hu ua 2205 stainless hlau, yog ib tug raug duplex stainless hlau. Nws muaj kwv yees li 50% ferrite thiab 50% austenite, yog li nthuav tawm lub zog zoo thiab nkag mus rau hauv qhov kub thiab txias. Tsis tas li ntawd, nws muaj kev tiv thaiv siab rau chloride kev nyuaj siab corrosion cracking thiab crevice corrosion. Vim cov khoom no, 1.4462 duplex steel yog dav siv nyob rau hauv high-pressure li qub thiab cov kav dej hauv kev lag luam roj thiab roj, nrog rau cov khoom siv thiab cov khoom siv hauv kev lag luam chemical.
1.4410 duplex steel, tseem hu ua 2507 duplex stainless hlau, zoo ib yam li 1.4462 tab sis muaj ntau dua corrosion kuj. Nws yog tsuas yog siv rau cov khoom siv thiab cov khoom siv uas tswj cov tshuaj chloride siab, xws li cov khoom siv hauv cov ntaub so ntswg thiab ntawv, cov chloride ib puag ncig hauv marine engineering, thiab lwm yam.
Corrosion kuj ntawm 1.4410 duplex stainless hlau: Lub corrosion kuj ntawm 1.4410 duplex stainless hlau yog vim qhov zoo ntawm nws duplex microstructure. Cov txheej txheem no muab cov hlau zoo heev rau pitting corrosion, crevice corrosion thiab uniform corrosion. Nyob rau hauv corrosive xov xwm, ib tug ntom oxide zaj duab xis yuav tsim nyob rau saum npoo ntawm 1.4410 duplex stainless hlau, uas yuav zoo tiv thaiv corrosion ntxiv. Qhov no tso cai rau cov khoom ua tau zoo nyob rau hauv ib puag ncig corrosive, txawm tias tiv thaiv cov pa tshuaj lom neeg los yog tswj lub zog zoo thiab corrosion kuj nyob rau hauv ib puag ncig hnyav xws li kub thiab siab. Tsis tas li ntawd, 1.4410 duplex stainless hlau kuj tseem muaj kev tiv thaiv zoo rau crevice corrosion thiab uniform corrosion. Cov khoom zoo heev corrosion kuj ua rau cov khoom siv no dav siv hauv ntau qhov chaw. Hauv kev lag luam tshuaj lom neeg, roj av, petrochemical thiab fais fab kev lag luam, 1.4410 duplex stainless hlau feem ntau yog siv los tsim cov khoom siv, xws li cov tso tsheb hlau luam, cov kav dej thiab cov twj tso kua mis, los tiv thaiv kev yaig los ntawm ntau yam corrosive media. Vim nws cov kev tiv thaiv corrosion zoo heev, cov khoom siv no kuj tau siv ntau hauv kev lag luam xws li marine engineering, chaw cia dej hauv av, thiab cov dej kho dej los tiv thaiv corrosion los ntawm seawater, dej hauv av, thiab dej ntws. Nyob rau hauv luv luv, lub corrosion kuj ntawm 1.4410 duplex stainless hlau yog vim nws tshwj xeeb duplex microstructure thiab zoo oxide zaj duab xis tsim muaj peev xwm. Qhov no tso cai rau cov khoom siv ua tau zoo nyob rau hauv ntau qhov chaw corrosive thiab yog li ntawd dav siv nyob rau hauv ntau yam teb.
1.4501 dual-theem steel, tseem hu ua X2CrNiMoN25-6-3, yog qib siab tshaj plaws ntawm cov hlau ob theem. Nws muaj kev tiv thaiv corrosion zoo heev thiab zoo txhua yam khoom, thiab ua tau zoo nyob rau hauv ntau qhov chaw hnyav. Yog li ntawd, 1.4501 dual-theem steel yog dav siv nyob rau hauv marine engineering, tshuaj lom neeg kev lag luam, tsheb tsim thiab lwm yam teb.
Thaum kawg, 1.4507 duplex steel, tseem hu ua 2RE69, yog super duplex stainless hlau. Nws muaj qhov zoo ntawm qhov kub thiab txias tsis kam thiab siab zog, nrog rau zoo corrosion kuj thiab qaug zog kuj. Yog li ntawd, nws yog dav siv nyob rau hauv high-pressure li qub thiab cov kav dej hauv kev lag luam roj thiab roj, nrog rau cov khoom siv thiab cov khoom siv hauv kev lag luam chemical. Cov saum toj no plaub hom dual-theem steel muaj lawv tus kheej cov yam ntxwv, thiab cov ntaub ntawv tsim nyog yuav raug xaiv raws li qhov tseeb daim ntawv thov scenarios kom tau raws li ntau yam complex siv yuav tsum tau.
