S32205

1. Zoo heev tiv thaiv chloride kev nyuaj siab corrosion cracking (core kom zoo dua):
Lub duplex microstructure muab kev tiv thaiv kab mob hauv lub cev rau chloride-induced SCC, ua rau nws yog ib qho kev hloov kho zoo tshaj plaws rau 304/316 austenitic stainless hlau hauv chloride- muaj ib puag ncig.
2. Exceptional zog:
Yield zog Ntau dua los yog sib npaug rau 450 MPa, kwv yees li ob zaug ntawm 316L, ua kom cov phab ntsa nyias nyias thiab txo cov nqi khoom thiab qhov hnyav ntawm cov qauv.
3. Superior pitting thiab crevice corrosion kuj:
PREN tus nqi kwv yees li 34-36, siab dua 316L (≈25), tsim nyog rau cov dej hiav txwv thiab chloride ib puag ncig.
4. Zoo weldability:
Ib tug thib ob- tiam duplex stainless hlau, nrog vuam kub- cuam tshuam cheeb tsam microstructure recoverable; post-weld kev kho cua sov feem ntau tsis tas yuav tsum tau ua.
5. Tsawg thermal expansion coefficient thiab siab dua thermal conductivity: Outperforms austenitic stainless hlau, xa cov kev ua tau zoo 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 S32205, thiab lwm yam.

A:

S32205 yog ib qho kev txhim kho ntawm S31803, nrog ob qho tib si muaj cov tshuaj lom neeg zoo sib xws thiab cov khoom.
Qhov sib txawv tseem ceeb nyob rau hauv cov kev cai nruj dua rau cov ntsiab lus nitrogen (0.14-0.20%) thiab molybdenum cov ntsiab lus (3.0-3.5%) hauv S32205, uas yog tsom rau kev ua kom muaj kev sib npaug zoo dua thiab tiv thaiv corrosion.
Hauv kev siv tswv yim, S32205 feem ntau tuaj yeem hloov S31803, thiab ob qho tib si ua raws li cov qauv kev qhia tshwj xeeb.
Tus nqi PREN ntawm S32205 feem ntau yog me ntsis siab dua qhov qis dua ntawm S31803, uas muaj peev xwm muab qhov zoo tshaj plaws pitting corrosion kuj nyob rau hauv tib yam kev ua haujlwm.

1. Nruam kev khiav hauj lwm kub (feem ntau rau corrosion kuj 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. Embrittlement ntawm 475 degree:
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:
Kev raug ncua ntev hauv 600-900℃ntau yam tuaj yeem ua rau nag lossis daus ntawm sigma theem, txo qis kev tiv thaiv corrosion thiab toughness. Kev kho mob yuav tsum tau ceev nrooj dhau ntawm qhov kub thiab txias.
4. Oxidation -Resistant 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℃.

S32205 muaj cov khoom siv vuam zoo, tab sis cov ntsiab lus hauv qab no yuav tsum raug sau tseg:
1. Pom zoo txoj kev vuam:
TIG, MIG, SMAW, SAW.
2. Thaum tshav kub kub input tswj:
Nws raug nquahu kom tswj hwm 0.5-2.5 kJ / mm, nrog rau qhov ntsuas kub sib txawv tsawg dua lossis sib npaug li 150 degree, txhawm rau tiv thaiv cov nplej coarsening hauv thaj chaw muaj kev kub ntxhov.
3. Cov roj tiv thaiv:
Cov roj sib xyaw ntawm Ar + 1-2% N₂ raug pom zoo los txhim kho cov ntsiab lus austenite hauv vuam.
4. Filler hlau:
Nws raug nquahu kom siv dual -theem stainless hlau vuam cov ntaub ntawv xws li ER2209 lossis E2209.
5. Tshaj tawm -welding kev kho mob:
Nws raug nquahu kom ua pickling lossis passivation los kho cov corrosion kuj ntawm tshav kub- cuam tshuam cheeb tsam.

Nws tuaj yeem hloov qee yam, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig chlorinated thiab nyob rau hauv cov xwm txheej uas yuav tsum tau muaj zog dua:

● Cov xwm txheej tsim nyog rau kev hloov pauv (S32205 muaj qhov pom tseeb zoo):
Hauv cov tshuaj chloride- uas muaj ib puag ncig xws li dej hiav txwv, brine, thiab ntug hiav txwv huab cua, SCC tsis kam thiab pitting corrosion kuj ntawm S32205 yog qhov zoo tshaj ntawm 316L.
● High-siab thiab siab-kev nyuaj siab cov yam ntxwv:
S32205 muaj ob zaug lub zog tawm los ntawm 316L, tso cai rau txo qis ntawm phab ntsa tuab.
● Thaum tshav kub kub Exchangers:
S32205 muaj ntau dua thermal conductivity, qis thermal expansion coefficient, thiab zoo thermal efficiency.
● Offshore platforms thiab cov khoom siv roj thiab roj:
S32205 yog cov ntaub ntawv siv rau kev lag luam, ua raws li NACE MR0175 tus qauv.
Cov xwm txheej uas hloov pauv tsis haum (316L tseem yog qhov kev xaiv 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
● Tsis yog -magnetic yuav tsum tau:
S32205 yog sib nqus (kwv yees li 50% ferrite), thaum 316L tsis yog -magnetic.
● Complex txias- tsim qhov chaw (xws li sib sib zog nqus- kos qhov chaw):
316L muaj qhov ua haujlwm qis dua thiab ua kom zoo dua qub.
● Tsawg kub (-50℃thiab qis dua):
Lub ductile - mus rau - nkig hloov kub ntawm duplex stainless hlau yog siab dua li ntawm austenitic stainless hlau

Cov lus pom zoo xaiv cov khoom:
Thov muab cov ncauj lus kom ntxaws txog kev khiav hauj lwm (kub ntau, chloride ion concentration, load hom, vuam yuav tsum, nruab nrab ib puag ncig) rau cov khoom tshwj xeeb. Peb tuaj yeem pab nrog kev sib piv kev lag luam thiab kev lag luam los pab koj ua qhov kev xaiv zoo ntawm S32205 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.