S32750

1. Exceptional kuj rau pitting thiab crevice corrosion (core kom zoo dua):
PREN Ntau dua lossis sib npaug rau 40, uas zoo dua li 316L (≈25) thiab 2205 (≈34-36). Nws qhov tseem ceeb pitting kub (CPT) tuaj yeem ncav cuag 45-50 degree, ua kom pom kev ua tau zoo hauv dej hiav txwv tropical thiab kub-kub concentrated chloride ib puag ncig.

2. Lub zog siab heev:
Lub zog tawm los yog ntau dua lossis sib npaug ntawm 550 MPa, kwv yees li 2.5 npaug ntawm 316L, ua kom txo qis ntawm phab ntsa tuab, yog li txo cov nqi khoom thiab qhov hnyav ntawm cov qauv.

3. Zoo heev tiv thaiv chloride kev nyuaj siab corrosion cracking:
Lub duplex microstructure yog inherently tiv thaiv chloride-induced stress corrosion cracking thiab ua raws li tus qauv NACE MR0175.
4. Kev ua haujlwm vuam zoo:
Siab -cov khoom siv vuam zoo tuaj yeem tau txais los ntawm kev siv cov khoom siv vuam sib txuam (ER2594) thiab tswj cov cua sov kom nruj.
5. Tsawg thermal conductivity thiab siab dua thermal diffusivity:
Superior rau austenitic stainless hlau, nws ua tau zoo dua nyob rau hauv tshav kub exchangers thiab thermal cycling tej yam kev mob.
6. Ua raws li ntau yam qauv thoob ntiaj teb:
ASTM A240, ASTM A789, ASTM A182, UNS S32750, thiab lwm yam.

A:

A:

1. Kev khiav hauj lwm kub tsis tu ncua (Tsom rau Corrosion Resistance thiab Toughness):
Nws raug pom zoo kom tsawg dua lossis sib npaug li 300℃. Ntawm qhov ntsuas kub no, cov khoom siv kho tshuab zoo thiab kev tiv thaiv corrosion tuaj yeem tswj tau, thiab kev pheej hmoo ntawm 475℃embrittlement tuaj yeem zam tau.
2. 475℃Embrittlement:
Thaum lub sij hawm ntev siv ntawm 300-500 degree, ferrite theem yuav raug kev puas tsuaj ntawm spinodal decomposition, ua rau txo qis hauv toughness. Kev siv mus sij hawm ntev hauv qhov ntsuas kub no tsis pom zoo.
3. Sigma Phase Embrittlement:
Ntev raug nyob rau hauv 600-900℃ntau yam yuav ua rau cov nag lossis daus ntawm sigma theem, txo qis corrosion kuj thiab toughness. Kev kho mob yuav tsum tau ceev nrooj dhau ntawm qhov kub thiab txias.
4. Antioxidant Kub:
Nws tuaj yeem ncav cuag siab li 800℃hauv lub sijhawm luv, tab sis rau ntev -lub sij hawm oxidation tsis kam, nws raug pom zoo kom tsawg dua lossis sib npaug li 650℃.

S32750 muaj cov khoom siv vuam zoo, tab sis cov txheej txheem yuav tsum tau tswj xyuas nruj dua li 2205:
1. Pom zoo txoj kev vuam:
TIG, MIG, SMAW, SAW.
2. Thermal Input Control:
Nws raug nquahu kom siv 0.5-2.5 kJ / mm, nrog rau qhov kub nruab nrab tsawg dua lossis sib npaug li 100-150 degree, kom tsis txhob muaj cov nplej coarsening nyob rau hauv thaj chaw kub thiab nag lossis daus ntawm cov theem teeb meem.
3. Kev tiv thaiv Gas:
Nws raug nquahu kom siv cov roj sib xyaw ntawm Ar + 1-2% N₂ txhawm rau txhim kho cov ntsiab lus austenite hauv vuam seam.
4. Filling Hlau:
Nws raug nquahu kom siv ER2594 lossis E2594 super duplex stainless hlau vuam cov ntaub ntawv.
5. Tshaj tawm -weld kho:
Nws raug nquahu kom ua pickling lossis passivation los kho cov corrosion kuj ntawm tshav kub- cuam tshuam cheeb tsam.

Cov xwm txheej tsim nyog rau kev hloov pauv (S32750 muaj qhov pom tseeb zoo):
● Extreme Chloride Ib puag ncig:
Cov dej hiav txwv tropical, siab -kub concentrated brine, thiab acidic chloride media. Qhov kev tiv thaiv corrosion ntawm S32750 yog qhov zoo tshaj plaws ntawm 316L thiab 2205.
● High Chloride Siab - Ib puag ncig Kub:
Qhov tseem ceeb pitting kub (CPT) ntawm S32750 tuaj yeem ncav cuag 45-50 degree, ua rau nws tsim nyog rau cov dej kub hauv dej hiav txwv.
● High-kev nyuaj siab cov qauv:
Lub zog tawm los ntawm S32750 yog 2.5 npaug ntawm 316L, tso cai rau txo qis ntawm phab ntsa tuab.
● Acidic roj thiab roj ib puag ncig uas muaj H₂S/CO₂:
S32750 ua raws li NACE MR0175 tus qauv thiab tsim nyog rau huab cua acidic.

Cov xwm txheej uas hloov pauv tsis tsim nyog (316L lossis 2205 tseem xaiv qhov zoo dua):
● chlorine-dawb, qis-kub, thiab ib puag ncig corrosive me ntsis:
316L yog tus nqi ntau dua - siv tau thiab txaus kom tau raws li qhov yuav tsum tau ua
● Nruab Nrab Corrosion Ib puag ncig:
2205 muab tus nqi zoo dua -kev ua tau zoo, nrog PREN ntawm 34-36 txaus.
● Tsis yog -Magnetic Requirement:
S32750 yog sib nqus, thaum 316L tsis yog{2}}sib nqus.
● Complex Cold -Formed Parts:
316L muaj qhov ua haujlwm qis dua thiab ua kom zoo dua qub.
● Tsawg kub (-50℃thiab qis dua):
Lub ductile - mus rau - brittle hloov kub ntawm duplex stainless hlau yog siab dua li ntawm austenitic stainless hlau.
● Tus nqi- cov haujlwm tseem ceeb:
Tus nqi ntawm S32750 yog siab dua li ntawm 2205 thiab 316L.

Cov lus pom zoo xaiv cov khoom:
Thov muab cov ncauj lus kom ntxaws txog kev khiav hauj lwm (qhov kub thiab txias, chloride ion concentration, load hom, vuam yuav tsum, thiab nruab nrab ib puag ncig) rau cov khoom tshwj xeeb. Peb tuaj yeem pab nrog kev txheeb xyuas kev lag luam thiab kev lag luam los pab koj ua qhov kev xaiv zoo ntawm S32750 thiab lwm qib stainless hlau.
Rau cov lus hais txog cov kev qhia tshwj xeeb, cov ntaub ntawv xeem cov ntaub ntawv, lossis cov ntawv txheeb xyuas, thov hu rau peb cov kws tsim khoom muag. Peb txhawb customizing qhov ntev, kev kho cua sov, thiab kev kho deg raws li xav tau, thiab muab tag nrho cov ntaub ntawv pov thawj thoob ntiaj teb.