Duplex steel yog hais txog tsev neeg ntawm cov hlau tsis xeb uas muaj ob-theem microstructure uas muaj ob qho tib si austenitic (lub ntsej muag-centered cubic crystal structure) thiab ferritic (lub cev-centered cubic crystal structure). Cov qauv dual-theem no yog ua tiav los ntawm kev sib xyaw ua ke tshwj xeeb uas suav nrog cov ntsiab lus xws li chromium, nickel, molybdenum, thiab nitrogen.
Cov hlau duplex stainless feem ntau yog UNS S3XXX series, qhov twg "S" sawv cev rau stainless, thiab cov lej qhia txog cov khoom sib xyaw tshwj xeeb. Lub microstructure ob-theem muab kev sib xyaw ua ke ntawm cov khoom zoo, ua rau duplex steel haum rau ntau yam kev siv. Qee qhov tseem ceeb ntawm duplex steel suav nrog:
1. Kev Tiv Thaiv Kev Xeb: Duplex steel muaj kev tiv thaiv kev xeb zoo heev, tshwj xeeb tshaj yog nyob rau hauv qhov chaw nyuaj uas muaj chlorides. Qhov no ua rau nws tsim nyog siv rau hauv kev ua tshuaj lom neeg, roj thiab roj av, thiab kev siv hauv hiav txwv.
2. Lub Zog Muaj Zog: Piv rau cov hlau tsis xeb austenitic, duplex steel muaj lub zog siab dua, ua rau nws tsim nyog rau cov ntawv thov uas xav tau lub zog kho tshuab ntau dua.
3. Kev Ruaj Khob Zoo thiab Kev Ywj Pheej: Duplex steel tseem muaj kev ruaj khov thiab kev ywj pheej zoo, txawm tias nyob rau hauv qhov kub qis. Kev sib xyaw ua ke ntawm cov yam ntxwv no muaj txiaj ntsig zoo rau cov ntawv thov uas cov khoom siv yuav raug rau ntau yam kev thauj khoom thiab qhov kub thiab txias.
4. Kev Tiv Thaiv Kev Nyuaj Siab Corrosion: Duplex steel ua pov thawj zoo tiv thaiv kev nyuaj siab corrosion cracking, ib hom corrosion uas tuaj yeem tshwm sim nyob rau hauv kev cuam tshuam ntawm kev ntxhov siab tensile thiab ib puag ncig corrosive.
5. Siv Nyiaj Tsim Nyog: Txawm hais tias cov hlau duplex tuaj yeem kim dua li cov hlau austenitic stainless hlau ib txwm muaj, nws cov yam ntxwv kev ua tau zoo feem ntau ua rau tus nqi tsim nyog, tshwj xeeb tshaj yog nyob rau hauv cov ntawv thov uas qhov kev tiv thaiv corrosion thiab lub zog yog qhov tseem ceeb.
Cov qib hlau stainless hlau duplex feem ntau suav nrogduplex 2205 (UNS S32205)thiab duplex 2507 (UNS S32750). Cov qib no siv dav hauv kev lag luam xws li kev ua tshuaj lom neeg, kev tshawb nrhiav roj thiab roj av, kev tsim kho hauv hiav txwv thiab dej hiav txwv, thiab kev tsim cov ntawv thiab ntawv.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-27-2023