Stainless hlau feem ntau yog cais raws li nws cov microstructure, uas yog txiav txim los ntawm nws cov tshuaj muaj pes tsawg leeg thiab txoj kev nws yog ua tiav. Cov kev faib feem ntau ntawm stainless hlau yog:
Austenitic stainless hlau: Hom stainless hlau no tsis yog hlau nplaum thiab muaj lub ntsej muag-centered cubic (FCC) siv lead ua qauv. Nws muaj cov qib siab ntawm chromium thiab npib tsib xee, uas muab nws zoo heev corrosion kuj thiab zoo txhua yam khoom. Austenitic stainless hlau feem ntau yog siv rau hauv cov ntawv thov uas yuav tsum muaj kev tiv thaiv corrosion siab, xws li hauv kev lag luam khoom noj thiab dej haus, khoom siv kho mob, thiab kev siv vaj tse.
Ferritic stainless hlau: Ferritic stainless hlau yog hlau nplaum thiab muaj lub cev-centered cubic (BCC) siv lead ua qauv. Nws muaj cov qib siab ntawm chromium, tab sis me ntsis kom tsis muaj npib tsib xee. Ferritic stainless hlau muaj qhov zoo corrosion kuj, tab sis cov khoom siv qis dua piv rau austenitic stainless hlau. Nws yog feem ntau siv nyob rau hauv automotive tso tshuab, khoom siv, thiab architectural daim ntaub ntawv.
Martensitic stainless hlau: Martensitic stainless hlau yog hlau nplaum thiab muaj BCC siv lead ua qauv. Nws muaj cov qib siab ntawm chromium thiab cov pa roj carbon tsawg. Martensitic stainless hlau muaj lub zog siab thiab hardness, tab sis qis corrosion kuj piv rau austenitic thiab ferritic stainless hlau. Nws yog feem ntau siv rau hauv cov ntawv thov uas xav tau lub zog siab, xws li hauv cov tais diav, riam, thiab cov khoom siv dav hlau.
Duplex stainless hlau: Duplex stainless hlau muaj qhov sib xyaw microstructure ntawm ob qho tib si austenitic thiab ferritic stainless hlau, uas muab kev sib xyaw ua ke ntawm lub zog siab thiab corrosion kuj. Duplex stainless hlau feem ntau yog siv rau hauv cov ntawv thov uas xav tau lub zog siab thiab corrosion kuj, xws li hauv kev ua tshuaj lom neeg, roj thiab roj, thiab kev siv dej hiav txwv.
Precipitation hardening stainless hlau: Precipitation hardening stainless hlau yog ib hom stainless hlau uas tuaj yeem ua kom sov-kho kom ua tiav lub zog thiab hardness. Nws muaj cov qib siab ntawm chromium, npib tsib xee, thiab lwm yam alloying ntsiab. Precipitation hardening stainless hlau yog feem ntau siv hauv aerospace thiab lwm yam kev ua haujlwm siab.
