Dab tsi yog qhov sib txawv ntawm 308 thiab 316 vuam hlau?

308 thiab 316 Vuam cov xov hlau yog ob qho tib si stainless hlau muab khoom siv dav siv rau cov kev siv tshuaj txawv raws li lawv cov yam ntxwv ua tau zoo. Nkag siab txog lawv qhov sib txawv yog qhov tseem ceeb rau kev xaiv cov xaim xaim kom ntseeg tau tias cov khoom siv hlau ua kom pom kev zoo nkauj- Muaj lub zog tshwj xeeb thiab muaj zog.
Tshuaj lom neeg tshuaj lom neeg: cov tub sab qhov sib txawv
Qhov sib txawv ntawm kev sib txawv ntawm 308 thiab 316 vuam hlau nyob hauv lawv cov pleev pleev xim, uas ncaj qha cuam tshuam lawv txoj kev ua tau zoo:
• 308 vuam hlau: tsim kom phim li 304 stainless hlau (308 xaim muaj kwv yees li 18-20% chromium thiab 8-10% npib tsib. Cov ntsiab lus no ua ib txheej thim rov qab oxide tso rau ntawm weld nto, muab cov khoom siv corrosion yooj yim tiv thaiv ya raws, huab cua, thiab tshuaj me me. Nws muaj me ntsis rau tsis muaj Molybdenum, lub ntsiab tseem ceeb rau kev tawm tsam cov chaw hnyav.
• 316 vuam hlau: tsim rau 316 Stainless hlau: Cov xaim no suav nrog cov roj chromium tib yam (16-18%) thiab ntxiv 2-3% Molybdenum. Molybdenum yog ib qho tseem ceeb tshaj plaws ua kom muaj kev xaiv, kev tawm tsam lossis tawm tsam ntawm Chlorwater (piv txwv li cov xaim hluav taws xob {12}
Cov ntsiab lus sib txawv hauv Molybdenum cov ntsiab lus yog lub hauv paus rau tag nrho lwm qhov kev hloov ua tau zoo ntawm ob xaim.
Corrosion Kuj: Cov Lus Cog Tseg Ib Puag Ncig
Corrosion kuj yog qhov twg 308 thiab 316 xov hlau diverge feem ntau:
• 308 vuam hlau: muaj General - lub hom phiaj corrosion, haum rau ib puag ncig nrog minimal tshuaj tawv tawv. Nws ua tau zoo nyob hauv cov chaw nyob sab hauv tsev, cov huab cua qhuav, lossis cov ntawv thov uas muaj tshuaj lom neeg ua haujlwm, cov cuab yeej ua haujlwm chav ua noj, lossis cov hlau zoo nkauj. Txawm li cas los xij, nws yog qhov yooj yim los pitting hauv sillwater, siab}} Cov av noo hiav txwv ntug dej hiav txwv (piv txwv li cov khoom siv ua pa).
• 316 vuam hlau: muab cov tshuaj tiv thaiv corrosion, tshwj xeeb tshaj tawm tsam chlorides, acids, thiab kev lag luam tshuaj. Lub molybdenum nyob rau hauv nws cov muaj kev tiv thaiv kev tsim cov pits, txawm tias nyob rau hauv cov ntsev tsuag, marrine chaw ib puag ncig, lossis siv cov nroj tsuag ua haujlwm. Nws yog cov xaim ntawm kev xaiv rau cov qauv chaw nyob ntawm ntug dej, cov khoom siv ua haujlwm, cov khoom siv khib nyiab, thiab cov xaim hluav taws xob {8 xaim yuav ua rau lub sijhawm.
Hauv ntej, 308 xaim hlau "ib puag ncig huv si" huv si, thaum 316 cov hlau coj mus rau hauv "qias neeg" lossis txhoj puab heev.
Cov Cuab Yeej Siv Cov Neeg Kho Tshuab: Lub Zog thiab Ductility
Thaum ob lub xov hlau tsim muaj cov khoom muaj zog, lawv cov khoom siv mechanary sib txawv me ntsis kom haum nrog lawv lub hom phiaj ua haujlwm hlau:
• 308 vuam hlau: Welds ua nrog 308 tus hlau muaj lub zog tensile ntawm 80,000-90,000 psi thiab zoo ductility, txuam nrog cov khoom ntawm 304 stainless hlau. Qhov no ua rau nws haum rau cov ntawv thov uas muaj zog tab sis huab kev ntxhov siab tsis yog kev txhawj xeeb} Xws li kev tso tsheb hlau luam hauv cov chaw qhuav.
• 316 hlau vuam hlau: 316 Hlau Welds muaj lub zog tshaj plaws Qhov no ua rau nws zoo tagnrho rau high- sov daim ntawv thov, muaj cov raj ntsuas kub, qhov twg 308 xaim hluav taws xob yuav dhau los ua lub sijhawm.
Daim Ntawv Thov Kev Xaiv: Xaiv raws li siv rooj plaub
Qhov kev xaiv ntawm 308 thiab 316 cov xov hlau nyob ntawm daim ntawv thov ib puag ncig thiab lub hauv paus pib:
• Thaum twg siv 308 vuam hlau:
◦welding 304 lossis 304l stainless hlau (feem ntau cov khoom siv tsis zoo).
◦indoor lossis cov ntawv thov qhuav (piv txwv li, chav ua noj tog, stainless hlau rooj tog zaum).
◦Projs nrog minimal raug rau noo noo, ntsev, lossis tshuaj lom neeg.
◦ges Fabration uas tus nqi yog qhov kev txiav txim siab (308 xaim feem ntau yog 10-20% tsawg dua 316).
• Thaum twg siv lub 316 vuam hlau:
◦welding 316 lossis 316L stainless hlau (rau marine lossis kev siv).
Hmoov tsis, ntses ntug dej hiav txwv, lossis dej hiav txwv ib puag ncig (piv txwv li, nkoj halls, kho vajtse).
Cov khoom siv tshuaj, dej chlorinated, lossis kua qaub acidic (piv txwv li, tso tsheb hlau luam yeeb, da dej Pas dej ua ke).
◦high - kub lossis siab - Kev ntxhov siab teeb tsa (piv txwv li roj ncu, roj thiab roj (roj av).
Siv 308 hlau rau weld 316 stainless hlau yuav tsim lub zog tsis muaj zog hauv cov qauv, raws li Weld yuav crodode ntev ua ntej lub hauv paus hlau. Hloov siab, siv 316 Hlau rau WELD 304 stainless hlau yog txheej txheem ua haujlwm tab sis tsis tsim nyog thiab tus nqi- tsis muaj txiaj ntsig.
Vuam Performance: Zoo sib xws hauv cov txheej txheem
Txawm hais tias lawv qhov sib txawv, 308 thiab 316 xaim tau ua zoo sib xws hauv vuam cov txheej txheem:
• Ob leeg yog siv feem ntau hauv Mig lossis Vig Vuam, nrog Argon {}}}}}}.
• Ob leeg ua cov ntaub qhwv huv, nti {{{{{}} e milling dawb thaum teem tawm kom raug, nrog zoo fusion rau lawv cov khoom siv hlau.
• Tsis yog nws yuav tsum siv cov khoom tshwj xeeb tshaj plaws dhau ntawm lub stainless hlau vuam teeb, txawm tias 316 xaim yuav tau txais txiaj ntsig me ntsis husion-}}}}}} yog qhov tseeb thaum muaj vuam tuab.
Xaus: Molybdenum txhais lawv lub luag haujlwm
Hauv cov ntsiab lus, 308 thiab 316 Vuam hlau yog qhov txawv los ntawm kev xaiv cov kab mob corrosion, thaum muaj cov pa hluav taws xob rau cov ntsev, tshuaj lom neeg, lossis qhov kub thiab txias.
Tus yuam sij xaiv ntawm lawv tab tom ntsuas lub weld ib puag ncig: yog tias nws yuav ntsib cov kab hlau Weld: yog tias nws yuav tsis txhob muaj cov kua qaub, 316 tsis yog {sib ceg. Rau qhuav, sab hauv tsev, lossis cov mob me me, 308 muaj kev ua tau zoo ntawm tus nqi qis. Sib piv cov hlau rau ib puag ncig kom ntseeg tau Weld yuav kav ntev li ntev tau yog tus ncej hlau nws tus kheej.