S321yog aTitanium{0}}stabilizedaustenitic stainless hlau. Nws cov tshuaj muaj pes tsawg leeg yog raws li cov classic 18-8 (Chromium-Nickel) qauv tab sis nrog ib qho kev sib ntxiv ntawmTitanium (Ti). HT PIPE is aastm a 269 321 stainless hlau raj yeeb nkabtus xa khoom nrog 15+ kev xa tawm. Tiv tauj peb kom paub ntau ntxiv thiab quotes dawb!
Vim li cas titanium?
Nyob rau hauv qhov kub ntawm 425℃-850 degree, tus qauv stainless hlau (xws li 304) yog nquag chromium carbide nag lossis daus. Qhov no depletes chromium ntawm cov ciam teb nplej, ua rau intergranular corrosion.
Titanium Intervention: Titanium muaj ntau dua affinity rau carbon dua li chromium. Nws reacts ua ntej kom ruaj khovTitanium Carbides (TiC), tawm hauv cov chromium tsis zoo nyob rau hauv cov hlau matrix tswj nws cov txheej txheem oxide tiv thaiv.
S321 vs. S304: Qhov Tseem Ceeb Qhov txawv
Cov neeg ua haujlwm muag khoom feem ntau hnyav qhov kev xaiv ntawm 304 thiab 321. Hauv luv luv:304 yeej ntawm tus nqi-kev ua tau zoo; 321 yeej ntawm "kev muaj sia nyob heev."
- Ncej -Weld Integrity: 304 yog qhov muaj feem cuam tshuam rau kev tawg hauv qhov chaw corrosive yog tias tsis tau muab tshem tawm tom qab vuam. S321 tuaj yeem muab tso ncaj qha rau hauv kev pabcuam yam tsis muaj kev tshaj tawm -weld heat treatment.
- Creep Resistance: Nyob rau hauv qhov chaw siab - qhov kub thiab txias, S321 muaj kev ntxhov siab zoo dua - cov khoom tawg thiab lub zog nkag siab dua.
- Nqi Factor: Vim yog cov ntsiab lus titanium thiab kev ua haujlwm tshwj xeeb, S321 feem ntau raug nqi15%–30%ntau tshaj 304.
Daim ntawv thov Fields tseem ceeb
Aerospace: Exhaust manifolds, cav nozzles, thiab kub exchangers.
Petrochemical: Kub exchanger raj bundles thiab siab hlab piping hauv refineries.
Lub zog tiam: Boiler superheaters thiab reheater raj.
Kev tiv thaiv ib puag ncig: Incinerator flues thiab khib nyiab kho tshuab
Vuam txoj kev zoo tshaj plaws
Thaum S321 tiv taus intergranular corrosion, precision hauv vuam tseem tseem ceeb heev:
- Filler Hlau: TIAB SA 321los yogSIB 347vuam hlau raug pom zoo kom phim lub hauv paus hlau cov khoom.
- Thaum tshav kub kub Input Control: Siv Cov Hluav Taws Xob Hluav Taws Xob los tiv thaiv "hlawv- tawm" ntawm titanium cov ntsiab lus.
- Interpass kub: Khaws qhov kub ntawm qhov sib txawv hauv qab 150℃kom muaj kev ruaj ntseg.
Machinability Challenges
Lub xub ntiag ntawm titanium carbides ua rau S321 me ntsis nyuaj rau lub tshuab dua 304. Nws muaj zog toughness ua rau kev ua hauj lwm ceev- hardening. Peb pom zoo:
- Sivcarbide-tipped cov cuab yeej.
- Ua hauj lwmqis txiav ceevua ke nrognoj ntau dua.
- Xyuas kom muaj qhov ntws tsis tu ncua ntawm siab - coolant zoo.
S321 Stainless Hlau Yeeb Nkab FAQ
Q: S321 vs S321H: Qhov twg zoo dua?
Tus qauv S321 yog rau kev xeb dav dav, thaum S321H muaj cov pa roj carbon ntau dua (0.04% - 0.10%) tshwj xeeb rau lub zog zoo dua 593 degree.
Q: Vim li cas ho tsis siv S321 rau txhua yam hloov S304?
S321 raug nqi 15% -30% ntau dua thiab nyuaj rau tshuab. Siv S304 rau cov kev xav tau yooj yim thiab txuag S321 rau siab -cov cua sov los yog welded ib puag ncig uas corrosion yog qhov txaus ntshai.
Q: Puas yog S321 vuam xav tau ua ntej- cua sov?
Tsis yog. Cia li ua kom qhov kub thiab txias ntawm cov vuam hla dhau 150℃kom tiv thaiv titanium burnout.
Q: Puas yog S321 resistant rau muaj zog nitric acid?
Tsis yog. Nws ua tau zoo ntawm qhov kub thiab txias, tab sis qib zoo li 304L lossis 347 zoo dua rau cov oxidizing acids muaj zog.
Q: Kuv yuav txheeb xyuas qhov zoo hauv daim ntawv qhia li cas?
Xyuas tias titanium tsawg kawg yog tsib npaug ntawm cov pa roj carbon ntxiv nitrogen. Nws tseem yuav tsum dhau ASTM A262 Practice E corrosion test thiab muab cov tshuaj annealed.
