Kev tiv thaiv corrosion ntawm stainless hlau nyob ntawm chromium, tab sis vim chromium yog ib qho ntawm cov khoom siv hlau, kev tiv thaiv sib txawv.Thaum qhov sib ntxiv ntawm chromium nce mus txog 10.5%, atmospheric corrosion kuj ntawm cov hlau nce ntau, tab sis thaum cov ntsiab lus chromium siab dua, txawm tias qhov corrosion kuj tseem tuaj yeem txhim kho, nws tsis pom tseeb.Yog vim li cas yog tias alloying steel nrog chromium hloov hom oxide nto rau saum npoo oxide zoo ib yam li uas tsim los ntawm cov hlau ntshiab chromium.Qhov no nruj nreem adhered chromium-nplua nuj oxide tiv thaiv nto ntawm oxidation ntxiv.Cov oxide txheej no yog nyias nyias, los ntawm qhov uas lub ntuj luster ntawm cov hlau nto tuaj yeem pom, muab cov hlau tsis muaj qhov tshwj xeeb.Tsis tas li ntawd, yog tias cov txheej txheej saum npoo raug puas lawm, cov hlau raug puas tsuaj yuav cuam tshuam nrog cov huab cua los kho nws tus kheej, rov tsim cov oxide "passivation film", thiab txuas ntxiv ua lub luag haujlwm tiv thaiv.Yog li ntawd, tag nrho cov ntsiab lus stainless hlau muaj cov yam ntxwv zoo, uas yog, cov ntsiab lus chromium yog siab dua 10.5%.Ntxiv nrog rau chromium, feem ntau siv alloying ntsiab yog npib tsib xee, molybdenum, titanium, niobium, tooj liab, nitrogen, thiab lwm yam, kom tau raws li qhov yuav tsum tau ntawm ntau yam kev siv rau cov qauv thiab cov khoom ntawm stainless hlau.
304 yog lub hom phiaj dav dav hlau stainless uas tau siv dav los ua cov khoom siv thiab cov khoom uas xav tau kev ua tau zoo tag nrho (corrosion resistance and formability).
301 stainless hlau nthuav qhia pom kev ua haujlwm nyuaj thaum lub sijhawm deformation, thiab siv rau ntau lub sijhawm uas xav tau lub zog ntau dua.
302 stainless hlau yog qhov tseem ceeb ntawm kev sib txawv ntawm 304 stainless hlau nrog cov ntsiab lus carbon ntau dua, uas tuaj yeem tau txais lub zog ntau dua los ntawm kev txias txias.
302B yog ib hom stainless hlau uas muaj cov ntsiab lus silicon siab, uas muaj kev tiv thaiv siab kub oxidation.
303 thiab 303S e yog dawb-txiav stainless steels uas muaj leej faj thiab selenium, feem, thiab yog siv nyob rau hauv daim ntawv thov qhov twg dawb-txiav thiab siab nto tag yog tsuas yog yuav tsum tau.303Se stainless hlau kuj tseem siv los ua qhov chaw uas yuav tsum tau kub ntxhov, vim tias nyob rau hauv cov xwm txheej no, cov hlau tsis muaj steel muaj qhov kub zoo ua haujlwm.
304L yog ib qho qis carbon sib txawv ntawm 304 stainless hlau siv qhov twg vuam yuav tsum tau.Cov ntsiab lus qis dua txo qis carbide nag lossis daus nyob rau hauv thaj chaw tshav kub uas cuam tshuam ze ntawm qhov vuam, uas tuaj yeem ua rau muaj kev cuam tshuam ntawm intergranular corrosion (weld erosion) ntawm stainless hlau hauv qee qhov chaw.
304N yog cov hlau tsis muaj nitrogen, thiab nitrogen ntxiv los ua kom lub zog ntawm cov hlau.
305 thiab 384 stainless hlau muaj cov nickel siab thiab muaj qhov ua haujlwm qis qis, ua rau lawv haum rau ntau daim ntawv thov uas yuav tsum tau ua kom txias txias.
308 stainless hlau yog siv los ua electrodes.
309, 310, 314 thiab 330 stainless hlau yog qhov siab, txhawm rau txhim kho oxidation tsis kam thiab creep zog ntawm cov hlau kub.30S5 thiab 310S yog qhov txawv ntawm 309 thiab 310 stainless hlau, qhov sib txawv tsuas yog tias cov ntsiab lus carbon tsawg dua, txhawm rau txo cov nag lossis daus ntawm carbides ze ntawm qhov vuam.330 stainless hlau muaj qhov tshwj xeeb siab ua haujlwm rau carburization thiab thermal shock resistance.
Hom 316 thiab 317 stainless hlau muaj cov txhuas thiab yog li ntawd tiv taus pitting corrosion ntau dua li 304 stainless hlau nyob rau hauv marine thiab tshuaj lom neeg kev lag luam ib puag ncig.Ntawm lawv, 316 stainless hlau variants muaj xws li qis carbon stainless hlau 316L, nitrogen-muaj zog stainless hlau 316N, thiab dawb-txiav stainless hlau 316F nrog siab sulfur ntsiab lus.
321, 347 thiab 348 yog stainless hlau stabilized nrog titanium, niobium ntxiv rau tantalum thiab niobium feem, uas yog haum rau vuam Cheebtsam siv nyob rau hauv high kub.348 yog ib hom stainless hlau haum rau kev lag luam hluav taws xob nuclear, uas muaj qee yam kev txwv ntawm kev sib xyaw ntawm tantalum thiab pob zeb diamond.
Post lub sij hawm: May-06-2023