Tib neeg feem ntau xav tiaslub pob valventawm stainless hlau thiab yuav tsis xeb. Yog tias nws ua li ntawd, nws yuav muaj teeb meem nrog tus hlau. Qhov no yog ib sab ib-tog kom tsis txhob to taub txog qhov tsis muaj kev nkag siab ntawm cov hlau stainless, uas tuaj yeem xeb xeb qee qhov xwm txheej.
Stainless hlau muaj peev xwm tiv taus atmospheric oxidation-Ntawd yog, xeb tsis kam, thiab tseem muaj peev xwm rau corrode hauv kev tshaj tawm hauv kev tshaj tawm cov kua qaub, alkalis, thiab ntsev-uas yog, corrosion tsis kam. Txawm li cas los xij, qhov loj me ntawm nws cov kev tiv thaiv corrosion yog hloov nrog cov tshuaj lom neeg muaj pes tsawg leeg, lub xeev ntawm kev tiv thaiv, cov xwm txheej ntawm kev siv thiab hom kev tawm tsam ib puag ncig.
Stainless hlau feem ntau muab faib ua:
Feem ntau, raws li tus kab hlau, zoo tib yam stainless hlau tau muab faib ua peb pawg: ustenitic stainless hlau, thiab martensitic stainless hlau. Ntawm lub hauv paus ntawm peb cov kev xav tau ntawm cov qauv me me, rau cov kev xav tau tshwj xeeb thiab cov nag lossis daus-dav hlau nrog cov hlau hlau tsawg dua 50% yog muab tau.
1. Austenitic stainless hlau.
Cov Matrix yog tus qauv ntawm Austenite qauv (CY theem American hlau thiab Hlau lub koom haum raug xaiv los ntawm cov lej hauv xyoo 200 thiab 300 series, xws li 304.
2. Ferritic stainless hlau.
Lub matrix yog Tus thawj coj los ntawm cov qauv Ferrite ((ib theem) ntawm lub cev-nruab nrab Crystal crystal cov qauv, tab sis tuaj yeem sib nqus me me los ntawm kev ua haujlwm txias. Cov neeg hlau yog cim nrog 430 thiab 446.
3. Martensitic Stainless hlau.
Matrix yog lub martensitic qauv (lub cev-nruab nrab sau lo lus lossis cubic), sib nqus, thiab nws cov khoom sib nqus tuaj yeem kho tau los ntawm kev kho cua sov. American hlau thiab steel lub koom haum yog xaiv los ntawm tus lej 410, 420 thiab 440. Martenite qauv ntawm cov qauv uas tsim nyog, thiab thaum txias cov qauv hloov mus rau hauv Martensite (piv txwv li, Hardened).
4. Austenitic-ferritic (duplex) stainless hlau.
Matrix muaj ob qho tib si ntawm ob-theem qauv, thiab cov ntsiab lus ntawm tsawg-theem matrix feem ntau yog ntau dua 15%. Nws sib nqus thiab tuaj yeem siv zog los ntawm kev ua haujlwm txias. 329 yog ib qho duplex stainless hlau. Compared with austenitic stainless steel, dual-phase steel has high strength, and the resistance to intergranular corrosion and chloride stress corrosion and pitting corrosion are significantly improved.
5. Nag los nag lossis tawv tawv tawv tawv.
Lub matrix yog Austenite lossis martensitic qauv thiab tuaj yeem ua rau muaj kev kub ntxhov los nag. American hlau thiab steel koom haum yog cim nrog tus lej 600 series, xws li 630, uas yog 17-4.
Feem ntau hais lus, ntxiv rau cov alloys, lub corrosion tsis kam ntawm Austenitic Stainless hlau yog qhov zoo tshaj plaws. Nyob rau hauv ib puag ncig corrosive tsawg, ferritic stainless hlau siv tau. Nyob rau hauv ib puag ncig corrosive, yog tias cov khoom yuav tsum muaj lub zog lossis siab tawv, martensitic stainless hlau thiab nag lossis daus hardening stainless hlau tuaj yeem siv.
Tib hom kev sib tw hlau tsis sib xws thiab cov khoom
01 304 stainless hlau
Nws yog ib qho ntawm feem ntau dav siv thiab dav siv Anlessenitic steels. Nws yog qhov tsim nyog rau kev tsim cov khoom sib sib zog nqus thiab acid pipelines, cov khoom siv acid, thiab lwm yam khoom siv hluav taws xob, cov khoom siv kub tsawg thiab cov khoom siv tsawg.
02 304L Stainless Hlau
Txhawm rau daws cov teeb meem ntawm ultra-tsawg cov roj carbon-tsawg cov roj av stainless hlau tsim vim yog qhov kev cuam tshuam loj ntawm cr23C6 ua rau muaj kev tiv thaiv nag lossis daus Tsuas yog rau lub zog qis me ntsis, lwm yam khoom yog tib yam li 321 stainless hlau. Nws yog tsuas yog siv rau cov khoom siv corrosion-resistant thiab cov khoom siv uas tsis tuaj yeem raug kev kho kom haum tom qab vuam, thiab tuaj yeem siv los tsim muaj ntau lub cev.
03 304h Stainless Hlau
Lub ceg sab hauv ntawm 304 stainless hlau muaj ib tug powerbon pawg feem ntawm 0.04% -0.10%, thiab nws cov kev ua tau zoo dua li ntawm 304 stainless hlau.
04 316 Stainless hlau
Ntxiv Molybdenum ntawm lub hauv paus ntawm 10cr18ni12 ua rau cov steel muaj zoo tsis kam rau kev txo qis nruab nrab thiab pitting corrosion. Nyob rau hauv seaterater thiab ntau lwm lwm cov xov xwm, kev tawm tsam corrosion yog qhov zoo dua 304 stainless hlau, tsuas yog siv rau cov ntaub ntawv-resistant cov ntaub ntawv.
05 316L Stainless Hlau
Ultra-Tsawg cov pa hlau muaj cov tshuaj tiv thaiv zoo nyob rau hauv cov khoom siv tuab thiab yog tsim nyog rau cov khoom siv tuab nrog cov khoom siv petrochemical.
06 316h Stainless Hlau
Sab hauv ceg ntawm 316 stainless hlau muaj ib tug carbon pawg feem ntawm 0.04% -0.10%, thiab nws cov kev ua tau zoo dua li ntawm 316 stainless hlau.
07 317 stainless hlau
Lub pitting corrosion thiab creep tsis zoo tshaj 316L stainless hlau, uas yog siv nyob rau hauv kev tsim cov petrochemical thiab organic acid corrosion resistant khoom.
08 321 stainless hlau
Titanium-stabilized ustenitic stainless hlau, ntxiv cov titegranular txhim kho, thiab tau hloov los ntawm ultra-tsawg cov roj carbon-tsawg cov roj carbon autritic stainless hlau. Tsuas yog qee lub sijhawm tshwj xeeb xws li kub siab lossis hydrogen corrosion tsis kam, nws feem ntau tsis pom zoo rau kev siv.
09 347 Stainless Hlau
Niobium-stabilized ustenitic steel hlau, ntxiv cov khoom siv hluav taws xob tsis zoo, muaj cov tsiaj txhu ua haujlwm zoo ib yam, xws li ua ntim khoom, cov kav dej, cua sov Kev sib pauv, cov tshuaj sib pauv, cua sov cov leeg hauv kev ua kom sov, thiab cua nqaj nqaj kub.
10 904L Stainless Hlau
Super tiav Austenitic Stainless hlau yog hom ntawm Super Austenitic Stainless hlau tsim los ntawm Outokumpu hauv Finland. , Nws muaj zoo corrosion tsis kam nyob rau hauv tsis-oxidizing cov kua qaub xws li sulfuric acid, thiab kuj muaj cov kua qaub ua kom zoo nkauj, thiab muaj cov acid Nws yog haum rau ntau qhov ntau ntawm cov sulfuric acid hauv qab 70°C, thiab muaj cov zoo corrosion tsis kam nyob rau hauv acetic acid thiab sib xyaw acid ntawm formic acid thiab acetic acid ntawm tej concentration thiab kub nyob rau hauv lub siab.
11 440C stainless hlau
Martensitic Stainless Hlau muaj lub hardness siab tshaj plaws ntawm cov hlau tsis muaj stainless hlau thiab stainless hlau, nrog lub hardness ntawm hrc57. Mas siv los ua kom tsis muaj cua hlob, bearings,tus npauj npaimib lub dab tsi uas qhib thiab kaw cores,tus npauj npaimib lub dab tsi uas qhib thiab kaw Rooj zaum, Tsho,ib lub dab tsi uas qhib thiab kaw stems, thiab lwm yam.
12 17-4ld toless Hlau
Martensitic nag lossis daus tawv ntawm HRC44 muaj lub zog siab, hardness thiab corrosion tsis kam thiab siv tau ntawm qhov kub siab tshaj 300°C. Nws muaj zoo corrosion tsis kam rau cov huab cua thiab diluted acid lossis ntsev. Nws corrosion tsis kam yog tib yam li ntawm 304 stainless hlau thiab 430 stainless hlau. Nws yog siv los tsim cov khoom siv hluav taws xob, tshuab luam yeeb tawg,tus npauj npaimib lub dab tsi uas qhib thiab kaw (VALVE CORES, lub rooj zaum valve, Tsho, valve kav) wAIT.
In ib lub dab tsi uas qhib thiab kaw Tsim thiab xaiv, ntau lub tshuab, series, thiab qib ntawm stainless hlau feem ntau tau ntsib. Thaum xaiv, qhov teeb meem yuav tsum tau txiav txim siab los ntawm ntau txoj kev xav xws li cov txheej txheem nruab nrab, ntsuas kub, siab, ntxhov siab, thiab cov nqi.
Lub Sijhawm Post: Jul-20-2022
