Stainless hlau yog renowned rau nws durability, corrosion kuj, thiab aesthetic thov, ua rau nws ib tug nrov xaiv nyob rau hauv ntau yam lag luam. Txawm li cas los xij, ntau tus neeg xav tsis thoob thaum pom tias qee cov khoom tsis muaj steel hlau muaj cov khoom sib nqus, thaum lwm tus tsis. Qhov kev hloov pauv no yog vim qhov tshwj xeeb muaj pes tsawg leeg thiab cov qauv ntawm stainless hlau alloy.
Stainless hlau feem ntau yog ua los ntawm hlau, chromium, thiab qee zaum npib tsib xee, ntawm lwm yam. Cov ntsiab lus chromium (feem ntau siab dua 10.5%) muab cov khoom siv nws cov khoom tiv thaiv corrosion los ntawm kev tsim cov txheej txheem oxide tiv thaiv ntawm qhov chaw. Txawm hais tias stainless hlau yog sib nqus los yog tsis yog nyob ntawm nws cov qauv siv lead ua, uas yog txiav txim siab los ntawm cov hlau alloy muaj pes tsawg leeg thiab kev kho cua sov.
Muaj ob lub ntsiab ntawm stainless hlau:austeniticthiabferritic.
Austenitic stainless hlauyog hom ntau tshaj plaws, sawv cev los ntawm qib zoo li 304 thiab 316. Nws muaj cov nickel tseem ceeb, uas ua rau lub ntsej muag austenitic (lub ntsej muag-centered cubic) crystal qauv. Cov qauv no tsis yog sib nqus nyob rau hauv ib txwm muaj, lub ntsiab lus austenitic stainless hlau feem ntau tsis nyiam cov hlau nplaum. Txawm li cas los xij, yog tias cov hlau tau dhau los ua cov txheej txheem tsim khoom xws li kev ua haujlwm txias lossis vuam, cov qauv siv lead ua tuaj yeem hloov pauv mus rau hauv martensite, uas yog hlau nplaum. Qhov no yog vim li cas qee qhov austenitic stainless hlau tuaj yeem pom cov khoom sib nqus tsis muaj zog.
Ferritic stainless hlau, xws li qib 430, muaj ferrite (lub cev-centered cubic) crystal qauv. Nws muaj me me rau tsis muaj nickel, thiab nws cov qauv yog inherently magnetic. Ferritic stainless hlau feem ntau siv rau hauv cov ntawv thov uas cov khoom sib nqus tsis muaj kev txhawj xeeb, xws li cov khoom siv hauv chav ua noj thiab cov khoom siv tsheb.
Hauv cov ntsiab lus, seb cov hlau tsis muaj hlau nplaum yog nyob ntawm nws hom, muaj pes tsawg leeg, thiab nws tau ua li cas. Kev nkag siab txog cov xwm txheej no yog qhov tseem ceeb rau kev xaiv cov khoom tsim nyog rau cov ntawv thov tshwj xeeb. Rau kev lag luam uas tsis yog hlau nplaum yog qhov tseem ceeb, xws li kev kho mob lossis hluav taws xob, qib austenitic feem ntau nyiam. Conversely, ferritic stainless hlau muaj ib tug nqi-zoo kev xaiv nrog ntuj magnetic zog rau tsawg xav tau kev siv.
