Duplex Stainless Hlau

Duplex stainless hlau yog hais txog cov khoom uas nws microstructure yog tsim ntawm ferrite thiab Austenite, txhua tus account rau li 50%. Hauv kev siv tiag tiag, nws yog qhov tsim nyog dua rau ib qho ntawm theem yuav tsum yog nruab nrab ntawm 40-60%.

Raws li cov yam ntxwv ntawm ob-theem qauv, los ntawm kev kho cov tshuaj lom neeg uas muaj zog thiab kev sib txuas ua ke ntawm cov hlau uas muaj zog dua, muaj zog thiab kev tsim khoom. Lawv lub cev muaj zog yog nruab nrab ntawm cov roj hlau stainless hlau thiab ferritic stainless hlau, tab sis los ze zog rau ferritic stainless hlau thiab carbon hlau. Cov tsis kam mus rau chloride pitting thiab crevice corrosion ntawm ob lub stlex stainless hlau muaj cuam tshuam nrog cov ntsiab lus chromium, molybdenum thiab nitrogen. Nws txoj kev tawm tsam rau pitting thiab crevice corrosion tuaj yeem zoo ib yam li ntawm lub 316 stainless hlau, lossis siab dua li ntawm stainless hlau rau seasater rau seasater, xws li 6% mo ustenitic steel. Txhua lub duplex stainless hlau yog ho cuam tshuam ntau dua rau chloride kev ntxhov siab ntau dua 300 series yog ntau dua li cov neeg siv tshuaj tiv thaiv tsis zoo, thaum uas qhia zoo huv si thiab tawv.

Ntau yam cov khoom lag luam ntawm Duplex Stainless Hlau: Daim hlau thiab sawb cov kav dej fittings thiab seamless kav fillings fittings thiab flanges pas nrig thiab xov hlau

Duplex stainless hlau feem ntau yuav tau muab faib ua plaub pawg:

Ib qho: Tsawg Alloy Hom, Tus Sawv Cev Qib Unss32304, Steel tsis muaj Molyi 304 lossis 316 nyob rau hauv cov nqe lus ntawm kev ntxhov siab corrosion.

Ob: Nruab nrab ntawm hom, tus sawv cev cov neeg sawv cev unsss31803, corrosion tsis yog nruab nrab ntawm AISI316L thiab 6% MO + n Anustenitic Stainless hlau.

Peb: Hom siab zoo, feem ntau muaj 25% cr, kuj muaj molybdenum thiab nitrogen, cov qib tseem muaj siab dua 22% credlex stainless hlau stainless.

Plaub: Super Duplex hom stainless hlau, muaj siab molybdenum thiab tooj liab, tus qauv zoo heev, piv rau cov hlau tsis sib xws. (Ceeb Toom: Pren: Pitting tiv taus tus nqi sib npaug)

Tshuaj lom neeg muaj feem sib xyaw ua ke cov ntsiab lus ntawm lub ntsiab hlau yog CR, NI, MO thiab NI thiab NI thiab n yog Austenite stabilizing ntsiab. Qee cov qauv steel kuj tseem muaj cov khoom xws li MN, Cu, thiab W. CR, NI, thiab mo tuaj yeem txhim kho corrosion tsis kam. Nws txoj kev tawm tsam rau pitting thiab crevice corrosion tshwj xeeb yog qhov tshwj xeeb hauv chloride muaj ib puag ncig.

Qhov Zoo Ntawm Ob Chav Stainless Hlau

1. Piv nrog austenitic steel hlau

1) Lub zog muaj zog ntau dua li ob npaug ntawm cov Austenitic Stainless hlau, thiab nws muaj cov khoom huv txaus thiab tawv yuav tsum tau tsim. Lub thickness ntawm kev tso tsheb hlau luam lossis cov hlab ntsha siab ua los ntawm cov yas stlex stainless yog 30-50% tsawg dua li ntawm cov hlau uas siv tau ntau, uas yog qhov ua kom txo tus nqi.

2) Nws muaj kev tsis kam ua rau muaj kev ntxhov siab corrosion, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig muaj chloride ions. Txawm tias Duplex stainless hlau nrog qis tshaj Alloy cov ntsiab lus tau tiv taus corrosion ntxhov siab dua li cov hlau tsis muaj xeb. Kev ntxhov siab corrosion yog ib qho teeb meem tseem ceeb uas tsis zoo li Austenitic stainless hlau yog qhov nyuaj los daws. 3) Cov corrosion tsis kam ntawm feem ntau 2205 duplex stainless hlau siv nyob rau hauv ntau cov xov xwm 316l austex stainless hlau muaj cov neeg tsis tshua muaj corrosion. Hauv qee cov xov xwm, xws li acetic acid thiab formic acid, nws tuaj yeem hloov siab-alloy Ausenitic Stainless hlau thiab txawm tias corrosion-resistant alloys. 4) Nws muaj qhov zoo hauv zos corrosion tsis kam. Piv nrog ustenitic steel hlau nrog tib cov ntsiab lus aluminium, nws hnav corrosion cov ntsiab lus thiab corrosion rog yog zoo dua li Austenitic steel. 5) Tus Linear nthuav kev coefficient yog qis dua li ntawm cov hlau tsis muaj zog, thiab muaj cov phiaj hlau tsim hluav taws xob, thiab cov phiaj ntau ntawm cov phiaj lossis cov ntaub qhwv.

2. Piv nrog ferritic stainless hlau, qhov zoo ntawm ob lub stlex stainless hlau yog raws li hauv qab no:

1) Cov cuab yeej siv cov khoom siv tshiab yog qhov siab dua cov txheej txheem Ferritic stainless, tshwj xeeb tshaj yog yas nyuaj. Nws tsis yog li rhiab rau brittleness li ferritic steel hlau.

2) Tsuas yog rau kev ntxhov siab corrosion tsis kam, lwm yam kev tiv thaiv corrosion hauv nroog corrosion yog qhov zoo dua li ferritic steel.

3) Kev Ua Lag Luam Txias thiab Kev Ua Txias Kev Ua Tau Zoo thiab kev ua haujlwm txias yog ntau dua zoo dua li ferritic steel.

4) Kev ua Vuam kev ua tau zoo dua li cov hlau ferritic stainless. Feem ntau, tsis muaj preheating yog yuav tsum tau ua ntej vuam thiab tsis muaj kev kho cua sov yog qhov yuav tsum tau tom qab vuam.

5) Daim ntawv thov ntau yog dav tshaj li ntawm ferritic steel hlau.

Daim ntawv thov

Due to the high strength of duplex steel, it can often save materials, such as reducing the wall thickness of the pipe. Siv SAF2205 thiab SA2507W ua piv txwv. SAF2205 haum rau siv hauv cov tshuaj chlorine-muaj ib puag ncig. Cov khoom siv no yog tsim nyog rau cov roj ua kom zoo lossis lwm cov txheej txheem kev tshaj tawm nrog chlorides. SAF2205 yog tsim nyog tshwj xeeb rau cov pa hluav taws uas muaj cov tshuaj chlorine-muaj cov kua txiv hmab txiv ntoo lossis cov zaub mov me ntsis li cua txias. Cov khoom siv no tseem tsim nyog rau diluted sulfuric acid daws thiab ntshiab organic acids thiab lawv cov mixtures. Piv txwv li: cov kav dej roj hauv cov roj thiab roj kev lag luam: cov roj av desalination hauv kev ua kom huv, cov khoom siv roj av; Cov tshuab cua txias siv cov dej qab zib me ntsis lossis cov tshuaj chlorine uas muaj cov kev daws teeb meem.