Austenitic stainless hlau: Austenitic stainless hlau yog cov feem ntau ntawm cov hlau tsis muaj steel thiab yog tus cwj pwm los ntawm nws cov qib siab chromium (feem ntau 18% lossis ntau dua) thiab npib tsib xee (feem ntau 8% lossis ntau dua). Nws muaj lub ntsej muag-centered cubic (FCC) siv lead ua qauv thiab tsis yog hlau nplaum. Austenitic stainless hlau paub txog nws zoo heev corrosion kuj, formability, thiab weldability, thiab yog siv nyob rau hauv ntau yam kev siv.
Ferritic stainless hlau: Ferritic stainless hlau muaj cov nickel qis dua austenitic stainless hlau (feem ntau tsawg dua 2%) thiab qib siab ntawm chromium (feem ntau nyob ib ncig ntawm 12% mus rau 27%). Nws muaj lub cev-centered cubic (BCC) siv lead ua qauv thiab yog hlau nplaum. Ferritic stainless hlau paub txog nws zoo corrosion kuj, tshwj xeeb tshaj yog nyob rau hauv me ntsis acidic los yog alkaline ib puag ncig, thiab nws zoo kub-kub oxidation kuj.
Martensitic stainless hlau: Martensitic stainless hlau yog tus cwj pwm los ntawm nws lub zog siab thiab hardness. Nws muaj cov qib nruab nrab ntawm chromium (feem ntau nyob ib ncig ntawm 11% txog 17%) thiab tuaj yeem muaj me me ntawm npib tsib xee, molybdenum, thiab lwm yam alloying ntsiab lus. Martensitic stainless hlau muaj lub cev-centered tetragonal (BCT) siv lead ua qauv thiab yog hlau nplaum. Nws yog feem ntau siv rau hauv cov ntawv thov uas xav tau lub zog siab, xws li hauv cutlery, riam, thiab turbine hniav.
Duplex stainless hlau: Duplex stainless hlau muaj qhov sib npaug sib npaug ntawm austenitic thiab ferritic theem, ua rau muaj kev sib xyaw microstructure. Nws feem ntau muaj cov qib siab ntawm chromium (kwv yees li 19% txog 28%) thiab qis dua nickel (ib ncig 4.5% mus rau 8%) dua li austenitic stainless hlau. Duplex stainless hlau paub txog nws zoo heev corrosion kuj thiab siab zog, ua rau nws haum rau siv nyob rau hauv daim ntawv thov xws li tshuaj ua, roj thiab roj ntau lawm, thiab marine ib puag ncig.
Precipitation-hardening stainless hlau: Precipitation-hardening stainless hlau tuaj yeem hardened los ntawm kev kho cua sov thiab nag lossis daus ntawm cov khoom me me hauv microstructure. Nws suav nrog qib xws li 17-4PH thiab 15-5PH, uas feem ntau siv hauv aerospace thiab lwm yam kev ua haujlwm siab.
