ferritic stain tsawg dua steel kev taw qhia

Cov ntsiab lus chromium yog 12% rau 30%. Nws yog cov hlaus tsis xeb hlau nrog lub cev-sau lo sau lo ntxaij ferrite raws li tus qauv tsim hauv qhov kub thiab qhov kub. Cov hom hlau no feem ntau tsis muaj npib tsib xee, thiab qee qhov muaj me me ntawm cov ntsiab lus xws li molybdenum, titanium lossis niobium, thiab muaj cov oxidation zoo tiv thaiv, tiv thaiv corrosion thiab chloride corrosion tsis kam. Ferritic stainless hlau tuaj yeem faib ua chromium tsawg, nruab nrab chromium thiab siab chromium raws li cov ntsiab lus chromium. Raws li kev coj dawb huv ntawm cov hlau, tshwj xeeb tshaj yog cov ntsiab lus ntawm carbon thiab nitrogen impurities, nws muaj peev xwm raug faib ua dog dig ferritic stainless hlau thiab ultra-pure ferritic stainless hlau. Cov. Ordinary ferritic stainless hlau muaj shortcomings xws li tsis kub thiab chav kub brittleness, nqis siab tshaj, siab intergranular corrosion nyiam, thiab tsis zoo weldability. Txawm hais tias hom hlau no tau tsim ua ntej lawm, nws qhov kev thov kev lag luam tau raug txwv ntau. Cov luv luv ntawm cov hlau tsis muaj steel zoo li muaj feem xyuam nrog cov hlau tsis huv, tshwj xeeb cov ntsiab lus ntawm cov khoom sib txawv xws li carbon thiab nitrogen hauv steel. Ntev npaum li cov pa roj carbon thiab nitrogen hauv cov hlau tsis tshua txaus, piv txwv li, tsis pub ntau tshaj 150 × 10 ～ 250 × 10-6, cov ntsiab lus luv luv saum toj no tuaj yeem kov yeej. Tom qab xyoo 1970, vim kev txhim kho ntawm kev siv thev naus laus zis, tshwj xeeb tshaj yog nqus hlau thiab nqus dej tsis huv, qib siab-purity ferritic stainless hlau nrog carbon + nitrogen ≤ 150 ～ 250 × 10-6 tau tsim, ua rau hom hlau kev lag luam muaj siv dav siv.