Kev paub zoo ntawm stainless hlau
Hlau yog ib lo lus dav dav rau hlau-carbon alloys nrog cov ntsiab lus carbon ntawm 0.02% thiab 2.11%.Ntau tshaj 2.11% yog hlau.
Cov tshuaj muaj pes tsawg leeg ntawm cov hlau tuaj yeem sib txawv heev.Cov hlau uas muaj cov pa roj carbon tsuas yog hu ua carbon steel lossis cov hlau zoo tib yam.Nyob rau hauv cov txheej txheem smelting steel, chromium, npib tsib xee, manganese, silicon, titanium, molybdenum thiab lwm yam hlau tseem tuaj yeem muab ntxiv los txhim kho cov khoom ntawm cov hlau.
Stainless hlau yog cov hlau uas muaj cov yam ntxwv tseem ceeb ntawm xeb thiab corrosion kuj, thiab cov ntsiab lus chromium yog tsawg kawg yog 10.5%, thiab cov ntsiab lus carbon tsis ntau tshaj 1.2%.
1. Stainless hlau yuav tsis xeb?
Thaum muaj xim av xeb (spots) nyob rau saum npoo ntawm stainless hlau, tib neeg xav tsis thoob.Lawv xav tias stainless hlau yuav tsis xeb.Rust tsis yog stainless hlau.Tej zaum nws yuav yog vim qhov teeb meem ntawm cov hlau tsis zoo.Qhov tseeb, qhov no yog ib qho kev pom tsis zoo ntawm qhov tsis muaj kev nkag siab ntawm stainless hlau.Stainless hlau yuav xeb nyob rau hauv tej yam kev mob.Stainless hlau muaj peev xwm tiv taus atmospheric oxidation - xeb kuj, thiab kuj muaj peev xwm tiv thaiv corrosion nyob rau hauv nruab nrab uas muaj acid, alkali thiab ntsev, uas yog, corrosion kuj.Txawm li cas los xij, nws qhov kev tiv thaiv corrosion txawv nrog nws cov tshuaj muaj pes tsawg leeg, kev sib nrig sib lub xeev, kev pab cuam thiab ib puag ncig hom xov xwm.Piv txwv li, 304 cov khoom muaj qhov zoo heev corrosion kuj nyob rau hauv qhuav thiab huv si huab cua, tab sis thaum nws tsiv mus rau lub ntug dej hiav txwv cheeb tsam, nws yuav sai sai xeb nyob rau hauv lub hiav txwv pos huab uas muaj ntsev ntau.Yog li ntawd, tsis yog txhua hom stainless hlau tuaj yeem tiv taus corrosion thiab xeb txhua lub sijhawm.Stainless hlau yog ib tug heev nyias, khoom thiab zoo ruaj khov chromium-nplua nuj oxide zaj duab xis (tiv thaiv zaj duab xis) tsim nyob rau hauv nws nto los tiv thaiv oxygen atoms los ntawm txuas ntxiv mus rau hauv thiab oxidize, yog li tau txais lub peev xwm los tiv thaiv corrosion.Ib zaug yog vim li cas, cov yeeb yaj kiab tau raug puas tsuaj tas li, cov pa oxygen atoms hauv huab cua lossis cov kua yuav nkag mus ntxiv lossis cov hlau atoms hauv cov hlau tseem yuav sib cais, tsim cov hlau oxide xoob, thiab cov hlau saum npoo yuav raug corroded tas li.
2. Dab tsi ntawm stainless hlau tsis yooj yim rau xeb?
Muaj peb yam tseem ceeb cuam tshuam rau stainless hlau corrosion.
1) Cov ntsiab lus ntawm alloying ntsiab
Feem ntau hais lus, hlau nrog 10.5% chromium cov ntsiab lus tsis yooj yim rau xeb.Qhov siab dua cov ntsiab lus ntawm chromium thiab npib tsib xee, qhov zoo dua qhov corrosion kuj.Piv txwv li, cov ntsiab lus ntawm 304 cov khoom nickel yog 8% ~ 10%, thiab cov ntsiab lus ntawm chromium yog 18% ~ 20%.Xws li stainless hlau yuav tsis xeb nyob rau hauv ib txwm muaj xwm txheej.
2) Smelting txheej txheem ntawm cov tuam txhab tsim khoom
Cov txheej txheem smelting ntawm cov tuam txhab tsim khoom kuj tseem cuam tshuam rau corrosion kuj ntawm stainless hlau.Loj stainless hlau nroj tsuag nrog zoo smelting technology, advanced cov cuab yeej thiab advanced technology yuav guaranteed nyob rau hauv cov nqe lus ntawm kev tswj ntawm alloying ntsiab, kev tshem tawm ntawm impurities, thiab kev tswj ntawm billet txias kub.Yog li ntawd, cov khoom zoo yog ruaj khov thiab txhim khu kev qha, lub sab hauv zoo yog qhov zoo, thiab nws tsis yooj yim rau xeb.Ntawm qhov tsis sib xws, qee cov nroj tsuag me me tau rov qab rau hauv cov khoom siv thiab thev naus laus zis.Thaum lub sij hawm smelting txheej txheem, impurities tsis tuaj yeem raug tshem tawm, thiab cov khoom tsim tawm yuav inevitably xeb.
3) Sab nraud ib puag ncig
Ib puag ncig nrog huab cua qhuav thiab qhov cua zoo tsis yooj yim rau xeb.Txawm li cas los xij, thaj chaw uas muaj huab cua siab, huab cua tsis tu ncua los nag, lossis siab acidity thiab alkalinity hauv huab cua yog qhov ua rau xeb.304 stainless hlau yuav xeb yog tias ib puag ncig ib puag ncig tsis zoo.
3. Yuav ua li cas nrog rusty me ntsis ntawm stainless hlau?
1) Cov txheej txheem tshuaj
Siv cov tshuaj ntxuav kua qaub los yog tshuaj tsuag los pab cov xeb xeb kom rov ua dua los ua cov chromium oxide zaj duab xis los kho lawv cov corrosion kuj.Tom qab ntxuav cov kua qaub, txhawm rau tshem tawm tag nrho cov kua qaub thiab cov kua qaub, nws yog ib qho tseem ceeb heev kom yaug nrog dej huv.Tom qab tag nrho cov kev kho mob, re-polish nrog polishing khoom thiab foob nrog polishing ciab.Rau qhov chaw uas muaj xeb me ntsis, 1: 1 roj av thiab cov roj cav sib xyaw kuj tuaj yeem siv los so cov pob xeb nrog cov ntaub huv huv.
2) Mechanical method
Blast tu, tua blasting nrog iav los yog ceramic hais, rhuav tshem, txhuam thiab polishing.Nws yog ib qho ua tau los so cov pa phem los ntawm cov khoom siv yav dhau los tshem tawm, polishing cov ntaub ntawv los yog cov khoom puas tsuaj los ntawm kev siv tshuab.Txhua yam kev ua qias tuaj, tshwj xeeb tshaj yog cov hlau txawv teb chaws, tuaj yeem dhau los ua qhov chaw ntawm corrosion, tshwj xeeb tshaj yog nyob rau hauv qhov chaw ntub dej.Yog li ntawd, lub tshuab ntxhua khaub ncaws yuav tsum raug ntxuav hauv qhov chaw qhuav.Kev siv cov txheej txheem siv tshuab tsuas tuaj yeem ntxuav nws qhov chaw thiab tsis tuaj yeem hloov qhov corrosion kuj ntawm cov khoom nws tus kheej.Yog li ntawd, nws raug nquahu kom rov qab polishing nrog cov khoom siv polishing tom qab kev tu txhua yam, thiab khi nrog polishing ciab.
4. Stainless hlau puas tuaj yeem txiav txim los ntawm cov hlau nplaum?
Ntau tus neeg mus yuav cov khoom lag luam stainless hlau lossis stainless hlau thiab nqa cov hlau nplaum me me nrog lawv.Thaum lawv saib cov khoom, lawv xav tias cov hlau tsis zoo yog qhov tsis tuaj yeem nqus tau.Yog tsis muaj hlau nplaum, yuav tsis muaj xeb.Qhov tseeb, qhov no yog kev nkag siab yuam kev.
Cov hlau tsis muaj hlau tsis sib nqus yog txiav txim siab los ntawm cov qauv.Thaum lub sij hawm solidification txheej txheem ntawm molten steel, vim qhov sib txawv hardification kub, nws yuav tsim stainless hlau nrog txawv qauv xws li "ferrite", "austenite" thiab "martensite", uas "ferrite" thiab "martensite" stainless hlau yog hlau nplaum. .Cov "austenitic" stainless hlau muaj cov khoom siv zoo thiab kev sib txuas, tab sis "ferritic" stainless hlau nrog hlau nplaum muaj zog dua li "austenitic" stainless hlau tsuas yog hais txog kev tiv thaiv corrosion.
Tam sim no, lub npe hu ua 200 series thiab 300 series stainless hlau nrog cov ntsiab lus siab manganese thiab cov ntsiab lus nickel qis hauv kev ua lag luam kuj tsis muaj hlau nplaum, tab sis lawv qhov kev ua tau zoo nyob deb ntawm 304 nrog cov ntsiab lus siab nickel.Ntawm qhov tsis sib xws, 304 tseem yuav muaj micro-magnetism tom qab ncab, annealing, polishing, casting thiab lwm yam txheej txheem.Yog li ntawd, nws yog ib qho kev nkag siab yuam kev thiab tsis muaj kev tshawb fawb los txiav txim qhov zoo thiab qhov tsis zoo ntawm stainless hlau los ntawm kev siv stainless hlau yam tsis muaj hlau nplaum.
5. Dab tsi yog hom ntawm cov hlau tsis zoo uas feem ntau siv?
201: Manganese yog siv los hloov nickel stainless hlau, uas muaj qee yam acid thiab alkali tsis kam, siab ceev, polishing thiab tsis muaj npuas.Nws yog siv rau saib cov rooj plaub, cov hniav zoo nkauj, cov raj muaj thiab lwm yam khoom siv kos duab ntiav.
202: Nws belongs rau tsawg npib tsib xee thiab siab manganese stainless hlau, nrog nickel thiab manganese cov ntsiab lus ntawm txog 8%.Raws li qhov tsis muaj zog corrosion, nws tuaj yeem hloov 304, nrog rau kev ua haujlwm siab.Nws yog tsuas yog siv nyob rau hauv lub tsev kho kom zoo nkauj, txoj kev loj guardrail, municipal engineering, iav handrail, txoj kev loj chaw, thiab lwm yam.
304: General stainless hlau, nrog zoo corrosion kuj, tshav kub tsis kam, kub tsis tshua muaj zog thiab mechanical zog, thiab siab toughness, yog siv nyob rau hauv kev lag luam khoom noj khoom haus, kev kho mob kev lag luam, kev lag luam, tshuaj lom neeg kev lag luam, thiab kho kom zoo nkauj hauv tsev.
304L: tsawg carbon 304 stainless hlau, siv rau cov khoom siv nrog corrosion kuj thiab formability.
316: Nrog rau qhov sib ntxiv ntawm Mo, nws muaj qhov zoo tshaj plaws kub corrosion kuj thiab yog siv rau hauv cov khoom siv dej hiav txwv, chemistry, zaub mov kev lag luam thiab ntawv ua.
321: Nws muaj kev kub ntxhov siab ua haujlwm zoo heev thiab kub siab ua haujlwm.
430: Thaum tshav kub kub resistant qaug zog, thermal expansion coefficient yog me dua li ntawm austenite, thiab nws yog siv rau cov khoom siv hauv tsev thiab kho kom zoo nkauj architectural.
410: Nws muaj hardness siab, toughness, zoo corrosion kuj, thermal conductivity loj, me me expansion coefficient, thiab zoo oxidation kuj.Nws yog siv los tsim atmospheric, dej vapor, dej thiab oxidizing acid corrosive qhov chaw.
Cov hauv qab no yog cov ntsiab lus ntawm "cov ntsiab lus alloy" ntawm cov qib sib txawv ntawm cov hlau tsis sib xws rau kev siv nkaus xwb:
Post lub sij hawm: Jan-30-2023
