Nyob rau hauv tsev neeg loj ntawm stainless hlau, 304 hlau thiab 304L hlau feem ntau tau suav tias yog "Twin Cov Kwv Tij". Lawv saib zoo ib yam thiab muaj ntau yam nyob hauv lub neej txhua hnub thiab kev lag luam, tab sis qhov tseeb lawv yog qhov sib txawv heev hauv cov tshuaj muaj tshuaj lom neeg, kev ua tau zoo thiab kev ua tiav thiab daim ntawv thov kev ua tiav. Hnub no, cia peb tshawb peb tshawb qhov sib txawv ntawm 304 hlau thiab 304L hlau
Kev hloov maj mam sib txawv hauv cov ntsiab lus carbon
Tshuaj lom neeg tshuaj lom neeg yog qhov tseem ceeb hauv kev txiav txim siab cov kev ua tau zoo ntawm cov hlau, thiab 304L hlau thiab 304L steel hauv cov ntsiab lus carbon. Cov pa roj carbon cov ntsiab lus ntawm 304 tus kab hlau tuaj yeem ncav cuag mus txog 0.08%, thaum cov pa roj carbon ntawm 304L cov hlau yog nruj me ntsis tswj tau ntawm 0.03%. Txawm hais tias nws tsuas yog qhov sib txawv ntawm 0.05%, nws muaj qhov cuam tshuam zoo heev ntawm kev ua yeeb yam ntawm cov hlau. Cov pa roj carbon yog zoo li ob npaug -}} edged rab ntaj hauv hlau. Tus nqi ntawm cov pa roj carbon tau txhim kho lub zog thiab kev tiv thaiv cov pa roj carbon ntau, tab sis yog ib txwm muaj cov pa roj carbon monoxide.
Lwm cov ntsiab thiab kev ua haujlwm
Ntxiv rau qhov sib txawv hauv cov ntsiab lus carbon, 304 steel thiab 304l steel yog feem ntau ntawm cov ntsiab lus ntawm lwm cov ntsiab lus chromium (CR) thiab Nickel (NI). Chromium yog lub ntsiab tseem ceeb uas ua rau cov hlwv uas tsis muaj hlau ua xeb {}}} tiv taus. Nws tsim cov yeeb yaj kiab ntom nti chomium oxide zaj duab xis nyob rau saum npoo ntawm cov hlau, tiv thaiv oxygen thiab lwm yam kev tshaj tawm kev sib tham los ntawm kev hu rau cov hlau matrix, yog li ua lub luag haujlwm tiv thaiv. Cov ntsiab lus Chromium hauv ob tus hlau feem ntau yog ib puag ncig 18%. Nickel tuaj yeem txhim kho kev nruj, weldability thiab corrosion tsis kam ntawm cov hlau hauv ib puag ncig tshwj xeeb. Cov ntsiab lus tsib xee yog nyob ib ncig ntawm 8%. Cov ntsiab lus ua haujlwm ua haujlwm ua haujlwm muab 304 hlau thiab 304L hlau zoo kev nkag siab zoo, ua rau lawv dav siv cov khoom siv hlau stainless.
Corrosion tsis kam yog qhov taw qhia tseem ceeb rau kev ntsuas qhov kev ua tau zoo ntawm cov hlau stainless. Hauv qhov chaw nyob dav dav thiab cov qauv sib xyaw ua kom zoo nkauj tsis kam vim nws tus kheej muaj pes tsawg leeg muaj pes tsawg leeg, uas tuaj yeem ua tau raws li kev xav tau ntawm feem ntau txhua hnub thiab kev muaj kev lag luam muaj kev lag luam. Txawm li cas los xij, ib zaug cov txheej txheem vuam yog koom nrog, qhov xwm txheej txawv. Thaum lub sij hawm vuam, qhov kub siab yuav ua rau cov pa roj carbon hauv lub chromium carromium nrog corrosion nyob ze ntawm cov qoob loo corrosity, yog li tsis muaj zog ntawm cov nplej zom zom cov nplej. Qhov no yog qhov yog li ntawd - hu ua inngranular corrosion senomenon. Vim yog cov muaj cov roj carbon ntau ntawm 304L, tus nqi ntawm chromium carbide tsim ntawm cov qoob loo ntawm cov nplej zom, txo qhov kev pheej hmoo ntawm cov kev pheej hmoo ntawm kev cuam tshuam ntawm corrosion intergranular. Yog li ntawd, nyob rau hauv vuam txheej txheem ntu lossis vuam cov khoom siv uas yuav tsum tau nyob hauv txoj kev muaj kev xeb hnyav rau lub sijhawm ntev, 304L ua yeeb yam zoo dua.
Cov Khoom Siv Neeg Kho Tshuab
Muaj qee yam sib txawv ntawm cov neeg kho tshuab ntawm 304 hlau thiab 304L hlau. Txij li thaum muaj peev xwm ua tau zoo li cov khoom siv roj carbon ntau ntxiv rau lub zog ntawm cov hlau, lub zog qis dua 304 qhov kawg qis dua li cov lej 304 vim nws cov ntsiab lus muaj roj carbon tsawg.
Feem ntau hais lus, lub zog tensile ntawm 304 hlau yog li 515MPA thiab cov txiaj ntsig lub zog yog li 205mpa; Thaum lub zog tensile ntawm 304L hlau yog li 485mpa thiab cov paib muaj zog yog li 170MPA. Qhov no txhais tau tias thaum raug rau sab nraud rog, 304 hlau tuaj yeem tiv thaiv ntau dua yam tsis muaj deformation lossis pob txha lov. Hauv kev tsim qauv tsev, yog tias cov khoom siv stainless hlau yog xav tau los tiv thaiv cov nra loj loj, 304 hlau yuav yog qhov kev xaiv tsim nyog dua.
Txawm li cas los xij, txawm hais tias cov hlau 304L muaj lub zog qis me ntsis, nws muaj kev nruj dua. Nyob rau qee lub sijhawm uas cov khoom siv tau muaj kev cuam tshuam zoo los yog kev ua tau zoo dua los yog kev ua haujlwm txias
Kev ua kev ua tau zoo ntawm cov hlau yog qhov tseem ceeb rau nws daim ntawv thov hauv kev tsim khoom tiag tiag. Hais txog cov kub ua, kev ua kub kub ntau yam ntawm 304L yog qhov sib zog me me ntawm 304L cov hlau, tab sis nws yooj yim dua ua kev lom zem kub xws li forging thiab kub dov thiab kub dov. Txawm li cas los xij, nyob rau hauv cov txheej txheem ua khaub thuas ua, vim nws lub zog ua haujlwm thiab tawv tawv, tab sis cov khoom txias txias, thiab cov khoom txias txias ua tau yooj yim dua tshiab tuaj yeem tau txais. Txawm hais tias cov hlau yooj yim tau yooj yim los ua cov txheej txheem thaum ua kom muaj zog, lub zog txhim kho ntawm cov khoom tom qab kev ua kom yooj yim yog tsis pom tseeb li ntawm 304 hlau. Yog li ntawd, 304 hlau muaj ntau ntxiv thaum muaj zog yuav tsum tau ua ntawm cov khoom tom qab ua khoom txias yog qhov siab.
Tsis tas li ntawd, thaum lub sij hawm vuam ua, raws li tau hais ua ntej, muaj 304l muaj cov khoom siv roj carrosion tsawg, thiab yog qhov tsim nyog vuam, thiab yog qhov tsim nyog dua rau ntau qhov vuam txheej txheem. Qhov no yog ib qho ntawm cov laj thawj yog vim li nws tau siv dav hauv kev tsim cov khoom siv loj- nplai welded qauv.
WURD DAIM NTAWV THOV NTAWM 304 hlau
Raws li nws qhov kev ua tau zoo zoo, 304 hlau tau siv dav. Hauv kev kho kom zoo nkauj kho kom zoo nkauj, seb nws puas yog cov cuab yeej siv hluav taws xob siab lossis sab hauv tsev, 304 steel tau muaj ntau yam vim nws lub zog zoo heev thiab qee lub zog. Hauv kev ua zaub mov noj, 304 sib ntsib cov qauv kev tu cev, yuav tsis muaj zaub mov tsis huv, thiab muaj cov khoom noj tsis zoo. Nws tuaj yeem hloov kho cov kua qaub thiab alkali ib puag ncig thaum ua khoom noj, yog li ntawd tau siv nyob rau hauv cov cuab yeej siv kho mob, thiab lwm yam ua rau kev phais cov cuab yeej thiab cov khoom siv ua haujlwm hauv cov tsev kho mob. Nws tsis yog tsuas yog ua tau raws li kev yuav tsum tau ua rau kev nyiam huv thiab kev huv si, tab sis kuj muaj qhov tsis muaj zog thiab corrosion tsis kam los ua kom muaj qhov ntev} lub sij hawm thiab ruaj khov siv cov khoom siv.
304L hlau ua si lub luag haujlwm IRREplacesable hauv qee cov teb tshwj xeeb nrog nws cov khoom ntiag tug. Hauv kev lag luam tshuaj, ntau cov tshuaj tiv thaiv cov tshuaj yog nrog lub xub ntiag ntawm cov xov muaj zog corrosive. The excellent corrosion resistance of 304L steel, especially the resistance to intergranular corrosion, makes it an ideal material for chemical reactors, pipelines and other equipment, which can ensure the safe operation of equipment in long-term harsh corrosion environments. Hauv kev ua liaj ua teb engineering, cov ntsev siab cov ntaub ntawv ntawm cov ntaub ntawv ntawm ntug dej hiav txwv ntawm ntug dej hiav txwv, cov khoom siv dej hiav txwv uas ntub dej, thiab lwm yam.
Tsis tas li ntawd, nyob hauv daim teb ntawm Aerospace, cov kev xav tau kev ua tau zoo rau cov khoom siv yog cov tawv heev. Cov pa roj carbon qis ntawm 304L hlau ua rau nws ua kom muaj kev ua tau zoo hauv vuam thiab qhov kub thiab txias ib puag ncig. Yog li ntawd, nws tseem siv rau hauv kev tsim cov khoom ntawm ib qho chaw aerospace.
Kuv yuav xaiv li cas?
Kev txiav txim siab tseem ceeb
Peb yuav tsum xaiv li 304 hlau thiab 304l hlau nyob rau hauv cov ntawv thov siv?
Ua ntej, xav txog tus nqi them tau. Feem ntau hais lus, 304L steel muaj ntau dua cov txheej txheem ntau lawm thiab nws tus nqi yog siab me dua 304 hlau. Yog tias siv cov xwm txheej yog nkag siab txog tus nqi thiab cov corrosion tsis xav tau, 304 hlau yuav yog kev xaiv ntau dua.
Tom qab ntawd, kev ua tau zoo yuav tsum yog tus yuam sij. Yog tias cov khoom lag luam yuav tsum tau tiv thaiv loj sab nraud sab nraud thiab muaj cov kev yuav tsum muaj lub zog muaj zog, 304 hlau yog qhov ntau dua; Yog tias cov khoom yuav tsum tau muab welded thaum ua, lossis yog nyob rau hauv ib puag ncig corrosive ib puag ncig ntev, tshwj xeeb yog ib puag ncig uas corrosion yuav tshwm sim, 304L steel yog qhov kev xaiv zoo dua.
Thaum kawg, xyuam xim rau nws siv ib puag ncig. Hauv cov cheeb tsam huab cua ib puag ncig thiab cov chaw muaj kev lag luam dav dav, 304 hlau txaus; Tab sis hauv cov chaw muaj kev sib luag tshwj xeeb xws li tshuaj thiab cov chaw nres nkoj ua kom muaj kuab lom, qhov zoo ntawm 304L hlau yuav muaj ntsiab.
Xaus:
Txawm hais tias 304 hlau thiab 304L hlau yog zoo sib xws hauv cov tsos, muaj qhov sib txawv ntawm cov tshuaj muaj tshuaj lom neeg, kev ua tau zoo thiab kev ua tiav thiab cov xwm txheej thov. Nkag siab cov kev sib txawv no yog qhov tseem ceeb rau peb kom raug xaiv thiab siv cov hlau ua kev tsim khoom tiag thiab lub neej. Tsuas yog los ntawm kev xaiv cov ntaub ntawv tsim nyog steel uas peb xav tau peb tuaj yeem ua tiav rau lawv cov txiaj ntsig thiab ua tiav "ob chav sau" ntawm cov txiaj ntsig thiab cov txiaj ntsig!
