304 stainless hlauyog cov feem ntau siv austenitic hlau. Qee zaum hu ua 18/8 stainless hlau vim nws muaj 18% chromium thiab 8% npib tsib xee. Qib 304 muaj cov tshuaj zoo heev, oxidation thiab corrosion kuj dhau ntawm qhov kub thiab txias. Txawm li cas los xij, nws muaj kev cuam tshuam rau pitting corrosion thiab kev ntxhov siab corrosion tawg thaum raug chlorides.
Ntxiv nrog rau nws cov corrosion kuj zoo heev, 304 stainless hlau kuj tseem muaj cov khoom siv zoo heev. Yog li ntawd, lawv tuaj yeem ua tau yooj yim zoo li thiab ua tiav rau hauv ntau yam khoom. Lub formability ntawm 304 stainless hlau yog siab dua li ntawm 316 qib. Txawm li cas los xij, lawv xav tau annealing tom qab ua haujlwm txias kom txo qis ua haujlwm hnyav.
304 yog ib qho yooj yim rau kev tsim thiab vuam, thiab yooj yim yob-tsim rau hauv ntau yam khoom siv rau kev lag luam, kev tsim kho thiab kev thauj mus los. Vim tias nws tuaj yeem rub tau hnyav, qib stainless hlau no yog cov khoom ntawm kev xaiv rau kos stainless hlau qhov chaw xws li dab dej, hollowware, thiab pans.
304 stainless hlauNws kuj tseem siv rau hauv cov khoom siv hluav taws xob (cov txiv ntseej, bolts thiab cov ntsia hlau), cov khoom siv hauv tsev ua haujlwm (cov hlab ntsha siab, cov hlab ntsha, cov kav dej), cov khoom siv hauv chav ua noj, cov tais diav, cookware, cov khoom siv kho kom zoo nkauj thiab cov vaj tsev, thiab lwm yam.
304 qib muaj nyob rau hauv qis carbon thiab siab carbon cov ntsiab lus sib txawv, uas yog qib 304L thiab qib 304H.
304L stainless hlau muaj peb yam tseem ceeb hauv qab no:
Cov ntsiab lus carbon tsawg: Cov ntsiab lus carbon ntawm 30 qib 4L yog qis dua tus qauv 304 qib. Cov ntsiab lus carbon feem ntau yog txwv rau qhov siab tshaj plaws ntawm 0.03%, yog li txo qhov kev pheej hmoo ntawm kev nkag siab thiab tsim cov chromium carbides ntawm cov ciam teb.
Txhim kho weldability: Vim nws cov ntsiab lus carbon tsawg, 304L txhim kho weldability. Qhov no ua rau nws haum rau vuam daim ntaub ntawv tsis tas yuav tsum tau tom qab vuam annealing los kho corrosion kuj.
Txo rhiab heev: Cov ntsiab lus carbon qis hauv 304L txo qhov muaj peev xwm rau kev nkag siab, ib qho tshwm sim uas chromium carbides tsim ntawm cov ciam teb, ua rau txo qis corrosion.
Vim tias cov khoom no, 304L feem ntau yog siv rau hauv cov ntawv thov uas xav tau vuam, xws li cov khoom siv welded hauv cov tshuaj, petrochemical, thiab kev lag luam ua zaub mov.
Piv nrog rau tus qauv 304 qib, 304H muaj cov ntsiab lus carbon ntau dua. Cov ntsiab lus carbon feem ntau nyob hauv thaj tsam ntawm 0.04-0.1%. Cov ntsiab lus ntau dua cov pa roj carbon monoxide txhim kho cov alloy lub zog creep thiab kub-kub lub zog zog. Yog li ntawd, 304H feem ntau yog siv rau hauv cov ntawv thov uas yuav tsum muaj qhov kub thiab txias, xws li cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, thiab cov khoom siv hluav taws xob kub kub.