Qhov sib txawv tseem ceeb ntawm austenitic thiab martensitic stainless hlau yog cov qauv siv lead ua ntawm austenitic stainless hlau yog lub ntsej muag-centred cubic qauv, whereas crystal qauv ntawm martensitic stainless hlau yog lub cev-centred cubic qauv.
Muaj plaub pawg loj ntawm stainless hlau raws li cov qauv siv lead ua ntawm cov hlau: austenitic, ferritic, martensitic thiab duplex. Qhov microstructure ntawm cov alloys no nyob ntawm cov ntsiab lus alloying tam sim no hauv lawv; Yog li, cov hlau no muaj cov alloying sib txawv thiab.
Austenitic Stainless Hlau yog dab tsi?
Austenitic stainless hlau yog ib daim ntawv ntawm cov hlau tsis muaj hlau uas muaj qhov tshwj xeeb corrosion tsis kam thiab cov khoom siv zoo heev. Cov qauv siv lead ua tseem ceeb ntawm cov hlau no yog lub ntsej muag-centred cubic qauv, thiab nws muaj "austenite" (ib qho hlau thiab cov hlau tsis sib nqus ntawm cov hlau los yog cov khoom siv ntawm cov hlau nrog cov hlau alloying).
Daim duab 01: Austenitic Stainless Steel
Tsis tas li ntawd, cov khoom no muaj lub zog zoo dua, toughness, formability, thiab ductility. Cov ntaub ntawv no muaj txiaj ntsig zoo hauv kev siv cryogenic (tsawg) thiab kev siv kub kub thiab. Ntxiv mus, lawv yog aesthetically muaj nqis. Thaum xav txog cov qauv, nws muaj lub ntsej muag-centred cubic qauv nyob rau hauv uas muaj ib tug atom ntawm txhua lub ces kaum ntawm lub voos xwmfab, thiab muaj ib tug atom nyob rau hauv txhua lub ntsej muag (nyob rau hauv nruab nrab ntawm lub ntsej muag). Cov qauv yog tsim thaum muaj ntau npaum li cas ntawm nickel yog tov nrog hlau thiab chromium. Feem ntau, cov khoom no muaj li ntawm 15% chromium thiab 8 txog 10% npib tsib xee.
Martensitic Stainless Hlau yog dab tsi?
Martensitic stainless hlau yog ib qho hlau uas muaj chromium ntau dua thiab feem ntau tsis muaj npib tsib xee hauv nws. Thiab, cov khoom siv no tuaj yeem yog cov pa roj carbon siab lossis qis carbon steel. Tsis tas li ntawd, nws muaj 12% hlau, 17% chromium thiab 0.10% carbon. Cov khoom tseem ceeb ntawm cov khoom no yog cov khoom siv kho tshuab thiab hnav tsis kam.
Daim duab 02: Tweezers ua los ntawm Martensitic Stainless Hlau
Tsis tas li ntawd, cov qauv siv lead ua ntawm martensitic stainless hlau yog lub cev-centred cubic qauv. Ntawm no, txhua lub ces kaum ntawm lub voos xwmfab muaj atoms, thiab muaj ib lub atom nyob rau hauv nruab nrab ntawm lub voos xwmfab. Nyob rau hauv lub hauv paus muaj pes tsawg leeg, tsis muaj nickel nyob rau hauv cov ntaub ntawv no. Tsis tas li ntawd, cov khoom no yog ferromagnetic, hardenable siv cov kev kho cua sov, tsawg corrosion kuj, thiab lwm yam.
Qhov txawv ntawm Austenitic thiab Martensitic Stainless Hlau yog dab tsi?
Austenitic stainless hlau yog ib daim ntawv ntawm cov hlau tsis muaj steel hlau uas muaj qhov tshwj xeeb corrosion tsis kam thiab cov khoom siv zoo nkauj, thaum martensitic stainless hlau yog cov hlau uas muaj chromium ntau dua thiab feem ntau tsis muaj nickel hauv nws. Qhov sib txawv tseem ceeb ntawm austenitic thiab martensitic stainless hlau yog cov qauv siv lead ua ntawm austenitic stainless hlau yog lub ntsej muag-centred cubic qauv whereas rau martensitic stainless hlau nws yog lub cev-centred cubic qauv.
Ntxiv mus, qhov sib txawv ntxiv ntawm austenitic thiab martensitic stainless hlau yog tias austenitic stainless hlau muaj nickel, tab sis martensitic stainless hlau tsis. Cov ntsiab lus nickel nyob rau hauv daim ntawv austenitic yog li ntawm 8 mus rau 10%. Tsis tas li ntawd, daim ntawv austenitic yog diamagnetic thaum daim ntawv martensitic yog ferromagnetic.
Summary – Austenitic vs Martensitic Stainless Hlau
Austenitic stainless hlau yog ib daim ntawv ntawm cov hlau tsis muaj steel hlau uas muaj qhov tshwj xeeb corrosion tsis kam thiab cov khoom siv zoo nkauj, thaum martensitic stainless hlau yog cov hlau uas muaj chromium ntau dua thiab feem ntau tsis muaj nickel hauv nws. Qhov sib txawv tseem ceeb ntawm austenitic thiab martensitic stainless hlau yog cov qauv siv lead ua ntawm austenitic stainless hlau yog lub ntsej muag-centred cubic qauv whereas crystal qauv ntawm martensitic stainless hlau nws yog lub cev-centred cubic qauv.
