Stainless hlau qhov chaw

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Stainless hlau yog ib pawg ntawm ferrous alloys uas muaj qhov tsawg kawg nkaus ntawm kwv yees li 11% chromium, ib qho muaj pes tsawg leeg uas tiv thaiv cov hlau los ntawm xeb thiab kuj muab cov khoom cua sov.Ntau hom stainless hlau muaj xws li cov ntsiab lus carbon (los ntawm 0.03% mus rau ntau tshaj 1.00%), nitrogen, aluminium, silicon, sulfur, titanium, npib tsib xee, tooj liab, selenium, niobium, thiab molybdenum.Cov hom tshwj xeeb ntawm cov hlau tsis muaj steel feem ntau raug xaiv los ntawm lawv tus lej AISI peb tus lej, piv txwv li, 304 stainless.

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Taw qhia ntawm stainless hlau qhov chaw:

Stainless hlau yog ib pawg ntawm ferrous alloys uas muaj qhov tsawg kawg nkaus ntawm kwv yees li 11% chromium, muaj pes tsawg leeg uas tiv thaiv cov hlau los ntawm xeb thiab kuj muab cov khoom cua sov-resistant.Txhua hom stainless hlau muaj xws li cov ntsiab lus carbon (los ntawm 0.03% mus rau ntau dua. 1.00%), nitrogen, aluminium, silicon, sulfur, titanium, npib tsib xee, tooj liab, selenium, niobium, thiab molybdenum.Specific hom stainless hlau feem ntau raug xaiv los ntawm lawv tus lej AISI peb tus lej, piv txwv li, 304 stainless.ISO 15510 tus qauv teev cov tshuaj muaj pes tsawg leeg ntawm cov hlau tsis muaj steel ntawm cov kev qhia tshwj xeeb hauv ISO, ASTM, EN, JIS, thiab GB (Suav) cov qauv hauv lub rooj sib hloov muaj txiaj ntsig.

Stainless hlau tsis kam mus rusting tshwm sim los ntawm lub xub ntiag ntawm chromium nyob rau hauv lub alloy, uas tsim ib tug passive zaj duab xis uas tiv thaiv cov khoom siv los ntawm corrosion, thiab nws tus kheej-kho nyob rau hauv lub xub ntiag ntawm oxygen.Corrosion kuj yuav nce ntxiv los ntawm cov nram qab no txhais tau tias. :

1. nce chromium cov ntsiab lus rau ntau tshaj 11%.
2. ntxiv nickel rau tsawg kawg yog 8%.
3. ntxiv molybdenum (uas kuj txhim kho kev tiv thaiv pitting corrosion).

Qhov sib ntxiv ntawm nitrogen kuj txhim kho kev tiv thaiv rau pitting corrosion thiab ua rau cov neeg kho tshuab muaj zog.Yog li, muaj ntau qib ntawm stainless hlau nrog sib txawv chromium thiab molybdenum cov ntsiab lus kom haum rau ib puag ncig cov hlau yuav tsum ua siab ntev.

Kev tiv thaiv corrosion thiab staining, tsis tshua muaj txij nkawm, thiab paub luster ua rau cov hlau tsis muaj steel yog cov khoom siv zoo tshaj plaws rau ntau daim ntawv thov uas yuav tsum muaj lub zog ntawm cov hlau thiab corrosion kuj.Ntxiv mus, stainless hlau tuaj yeem dov rau hauv cov nplooj ntawv, daim hlau, tuav, xaim, thiab tubing.Cov no tuaj yeem siv rau hauv cookware, cutlery, cov cuab yeej phais, cov khoom siv loj, tsheb, cov khoom siv hauv cov tsev loj, cov khoom siv hauv tsev (xws li, hauv cov ntawv mills, cov nroj tsuag tshuaj, dej kho), thiab cov tank thiab tankers rau tshuaj thiab khoom noj khoom haus.Cov khoom siv tiv thaiv corrosion, qhov yooj yim uas nws tuaj yeem ua kom huv thiab ua kom tsis muaj menyuam, thiab qhov tsis muaj qhov xav tau ntawm cov txheej txheem saum npoo tau ua rau kev siv cov hlau tsis muaj steel hauv chav ua noj thiab cov khoom ua zaub mov.

Austenitic stainless hlau yog tsev neeg loj tshaj plaws ntawm cov hlau tsis muaj steel, ua li ntawm ob feem peb ntawm tag nrho cov hlau stainless ntau lawm (saib cov duab hauv qab no).Lawv muaj ib tug austenitic microstructure, uas yog lub ntsej muag-centered cubic siv lead ua qauv.Qhov no microstructure yog tiav los ntawm alloying hlau nrog txaus npib tsib xee thiab manganese thiab nitrogen kom muaj ib tug austenitic microstructure nyob rau hauv tag nrho cov kub, xws li los ntawm lub cryogenic cheeb tsam mus rau lub melting point. .Yog li, austenitic stainless hlau tsis yog hardenable los ntawm kev kho cua sov vim lawv muaj tib lub microstructure ntawm txhua qhov kub.

Series ntawm stainless hlau khoom

Austenitic stainless hlau tuaj yeem muab faib ua ob pawg, 200 series thiab 300 series:

200 series yog chromium-manganese-nickel alloys uas ua kom muaj kev siv manganese thiab nitrogen kom txo qis kev siv nickel.Vim lawv cov nitrogen ntxiv, lawv muaj kwv yees li 50% siab dua yield zog dua 300 series stainless hlau ntawv.

Hom 201 yog hardenable los ntawm kev ua haujlwm txias.
Hom 202 yog lub hom phiaj dav dav stainless hlau.Txo cov ntsiab lus nickel thiab nce manganese ua rau tsis muaj zog corrosion.
300 series yog chromium-nickel alloys uas ua tiav lawv cov austenitic microstructure yuav luag tshwj xeeb los ntawm nickel alloying;qee cov qib high-alloyed muaj xws li qee cov nitrogen kom txo tau cov nickel.300 series yog pawg loj tshaj plaws thiab siv dav tshaj plaws.
Hom 304: Cov qib paub zoo tshaj plaws yog Hom 304, tseem hu ua 18/8 thiab 18/10 rau nws cov ntsiab lus ntawm 18% chromium thiab 8% / 10% npib tsib xee, feem.
Hom 316: Qhov thib ob feem ntau austenitic stainless hlau yog hom 316. Qhov sib ntxiv ntawm 2% molybdenum muab kev tiv thaiv ntau dua rau cov kua qaub thiab cov tshuaj tiv thaiv hauv zos los ntawm chloride ions.Tsawg-carbon versions, xws li 316L lossis 304L, muaj cov ntsiab lus carbon qis dua 0.03% thiab siv kom tsis txhob muaj teeb meem corrosion los ntawm vuam.

Kev kho cua sov ntawm stainless hlau

Martensitic stainless hlau tuaj yeem kho cua sov kom muab cov khoom zoo dua qub.

Kev kho cua sov feem ntau muaj peb kauj ruam:
Austenitizing, nyob rau hauv uas cov hlau yog rhuab mus rau ib tug kub ntawm 980-1,050 ° C (1,800-1,920 ° F), nyob ntawm seb qib.Cov txiaj ntsig austenite muaj lub ntsej muag-centered cubic crystal qauv.
Quenching.Lub austenite yog hloov mus rau hauv martensite, ib lub cev tawv-centered tetragonal siv lead ua qauv.Lub quenched martensite yog ib qho nyuaj heev thiab nkig heev rau feem ntau daim ntawv thov.Qee qhov residual austenite yuav nyob twj ywm.
Tempering.Martensite yog rhuab mus rau ib ncig ntawm 500 ° C (932 ° F), tuav ntawm qhov kub thiab txias, ces cua txias.Cov cua kub siab dua yuav txo tau lub zog thiab qhov kawg tensile lub zog tab sis ua rau kom elongation thiab cuam tshuam tsis kam.