Cov ntsiab lus chromium yog 12 feem pua mus rau 30 feem pua , thiab lub cev-centered cubic lattice ntawm ferrite yog siv los ua cov qauv matrix ntawm stainless hlau ntawm qhov kub thiab txias. Hom hlau no feem ntau tsis muaj npib tsib xee, thiab qee qhov muaj me me ntawm molybdenum, titanium lossis niobium thiab lwm yam, thiab muaj oxidation zoo, corrosion kuj thiab tsis kam mus rau chloride corrosion cracking.
Raws li cov ntsiab lus chromium, ferritic stainless hlau tuaj yeem muab faib ua peb pawg: tsawg chromium, nruab nrab chromium thiab siab chromium. Raws li cov purity ntawm cov hlau, tshwj xeeb tshaj yog cov ntsiab lus ntawm carbon thiab nitrogen impurities, nws yuav muab faib mus rau hauv zoo tib yam ferritic stainless hlau thiab ultra-ntshiab ferritic stainless hlau. .
Ordinary ferritic stainless hlau muaj qhov tsis zoo xws li qhov kub thiab txias ntawm chav tsev kub brittleness, notch rhiab heev, siab intergranular corrosion nyiam, thiab tsis zoo weldability. Txawm hais tias hom hlau no tau tsim ua ntej, nws daim ntawv thov kev lag luam tau raug txwv ntau heev. Cov kev tsis zoo ntawm cov hlau tsis zoo li qub ferritic stainless hlau muaj feem xyuam rau cov purity ntawm cov hlau, tshwj xeeb tshaj yog cov ntsiab lus siab ntawm interstitial ntsiab xws li carbon thiab nitrogen hauv cov hlau.
Ntev npaum li cov pa roj carbon thiab nitrogen hauv cov hlau tsis txaus, piv txwv li, tsis ntau tshaj 150 × 10 ~ 250 × 10, cov kev tsis zoo saum toj no tuaj yeem kov yeej. Tom qab xyoo 1970, vim yog kev tsim cov tshuab smelting, tshwj xeeb tshaj yog lub tshuab nqus tsev metallurgy thiab theem nrab refining txheej txheem, high-purity ferritic stainless hlau nrog carbon ntxiv nitrogen Tsawg dua los yog sib npaug li 150 ~ 250 × 10 tau tsim, ua rau hom hlau no dav. siv hauv kev lag luam. .
