Pearlitic hlau
Cov ntsiab lus alloying feem ntau yog chromium thiab molybdenum, thiab tag nrho cov nyiaj feem ntau tsis tshaj 5%. Ntxiv nrog rau pearlite thiab ferrite, nws cov qauv kuj muaj bainite. Hom hlau no muaj lub zog kub kub zoo thiab cov txheej txheem ua haujlwm ntawm 500 txog 600 degree, yog tus nqi qis, thiab dav siv los ua cov khoom kub-resistant hauv qab 600 degree. Xws li boiler steel kav, chav turbine impellers, rotors, fasteners thiab high-pressure hlab ntsha, kav, thiab lwm yam. Hom steel hom yog: 16Mo, 15CrMo, 12Cr1MoV, 12Cr2MoWVTiB, 10Cr2Mo1, 25Cr2Mo1V, 20Cr3Mo1, etc.
Martensitic hlau
Cov ntsiab lus chromium feem ntau yog 7 mus rau 13%. Nws muaj qhov kub thiab txias zog, oxidation tsis kam thiab dej vapor corrosion kuj qis dua 650 degree, tab sis tsis zoo weldability. 1Cr13 thiab 2Cr13 muaj li ntawm 12% chromium, thiab qib steel tsim los ntawm lub hauv paus no xws li 1Cr11MoV, 1Cr12WMoV, 2Cr12WMoNbVB, thiab lwm yam, feem ntau yog siv los ua chav turbine hniav, discs, shafts, fasteners, thiab lwm yam.S. , thiab lwm yam. siv rau kev tsim cov pa tawm ntawm lub tshuab hluav taws xob sab hauv kuj tseem yog martensitic cua sov-resistant steels.
Ferrite hlau
Nws muaj ntau cov ntsiab lus xws li chromium, aluminium, thiab silicon, tsim ib-theem ferrite qauv. Nws muaj qhov zoo oxidation tsis kam thiab tsis kam mus rau high-temperature gas corrosion, tab sis muaj tsawg-kub lub zog, siab chav tsev kub brittleness, thiab tsis zoo weldability. Xws li 1Cr13SiAl, 1Cr25Si2, thiab lwm yam. Nws yog feem ntau siv los ua cov khoom uas dais qis thiab yuav tsum tau kub oxidation tsis kam.
Austenitic hlau
Muaj ntau cov austenite-forming ntsiab xws li npib tsib xee, manganese, thiab nitrogen, nws muaj qhov kub thiab txias zog thiab cov qauv ruaj khov siab tshaj 600 degree, thiab muaj kev vuam zoo. Feem ntau siv los ua cov khoom siv hluav taws xob ua haujlwm siab tshaj 600 degree. Cov hom hlau xws li 1Cr18Ni9Ti (321), 1Cr23Ni13 (309), 0Cr25Ni20 (310S), 1Cr25Ni20Si2 (314), 2Cr20Mn9Ni2Si2N, 4Cr14Ni14W2Mo, thiab lwm yam.
