Txheej txheem cej luam
SA-213 T23yog ib qho kev qhia tshwj xeeb rau seamless ferritic thiab austenitic steel boiler, superheater, thiab tshav kub -exchanger tubes. Qib "T23" yog ib hom qis- alloy steel paub txog nwszoo heev - kub lub zog, weldability, thiab tsis kam mus creep.
Nws yog ib qho kev hloov kho ntawm cov laus T22 (2.25Cr-1Mo) qib, nrog rau kev sib ntxiv ntawm tungsten, vanadium, thiab lwm yam micro-alloying ntsiab, uas ua rau nws cov kev ua tau zoo.
Cov yam ntxwv tseem ceeb & Kev sib xyaw
Cov khoom zoo tshaj ntawm T23 yog los ntawm nws cov tshuaj ua tib zoo sib npaug.
Cov tshuaj muaj pes tsawg leeg (wt.%):
| Element | Cov ntsiab lus (%) | Lub hom phiaj |
|---|---|---|
| Cov pa roj carbon (C) | ~0.04 - 0.10 | Lub zog |
| Chromium (Cr) | ~1.90 - 2.60 | Oxidation & Corrosion Resistance |
| Molybdenum (hli) | ~0.05 - 0.30 | Strength & Creep Resistance |
| Tungsten (W) | ~1.45 - 1.75 | Solid Solution Strengthening (qhov tseem ceeb rau creep) |
| Vanadium (V) | ~0.20 - 0.30 | Carbide tsim, Creep Strength |
| Boron (B) | ~0.0005 - 0.0060 | Dramatically txhim kho hardenability & creep zog |
| Niobium (Nb) | ~0.02 - 0.08 | Fine carbide / nitride tsim rau grain refinement |
| Nitrogen (N) | ~ 0.030 hli | Ua haujlwm nrog V thiab Nb rau nag lossis daus |
| Cov pa roj carbon (C) | ~0.04 - 0.10 | Lub hauv paus muaj zog |
Nco tseg:Nws muaj ibqis carbon cov ntsiab luspiv rau T22, uas yog thawj qhov laj thawj rau nws cov weldability zoo dua.
Qhov Zoo Tshaj Plaws
High Creep Strength:T23 tuaj yeem tiv taus kev ntxhov siab ntawm qhov kub siab (feem ntau mus txog ~ 580℃/ 1075℃F) rau ncua sij hawm tsis muaj deforming. Qhov no yog nws qhov txiaj ntsig tseem ceeb tshaj plaws.
Weldability zoo heev:Vim nws cov ntsiab lus tsis tshua muaj carbon tsawg, nws muaj qhov sib npaug ntawm cov pa roj carbon tsawg (CE), txhais tau tias nws tuaj yeem welded yam tsis tau ua ntej - cua sov nyob rau hauv feem ntau thicknesses, simplifying fabrication. Post Weld Heat Treatment (PWHT) tseem xav tau.
Zoo Microstructural Stability:Resistant tsim cov theem nkig thiab tswj nws lub zog dhau lub sijhawm ua haujlwm ntev.
High Thermal conductivity:Muab piv rau austenitic stainless hlau (xws li TP304H, TP347H), nws muaj kev hloov pauv kom sov zoo dua, uas yog qhov tsim nyog rau cov raj boiler.
Cov ntawv thov siv
SA-213 T23 feem ntau yog siv nyob rau hauv qhov tseem ceeb tshaj plaws siab- qhov kub thiab txias ntawm niaj hnub, high-efficiency fais fab nroj tsuag:
Superheater Tubes:Qhov twg chav yog rhuab mus rau nws qhov kub tshaj plaws.
Reheater Tubes:Qhov twg chav xa rov qab mus rau lub turbine rau cua sov ntxiv.
Waterwall Panels:Hauv cov qauv boiler siab heev, tshwj xeeb tshaj yog rau cov nroj tsuag ultra-supercritical (USC), qhov uas nws tso cai rau cov phab ntsa nyias nyias thiab txhim kho cov cua sov.
Nws siv enables fais fab nroj tsuag ua hauj lwm nyob rau hauv siab dua kub thiab pressures, ua rauthermal efficiency ntau dua thiab txo CO₂ emissions.
Sib piv nrog Lwm Qib
| Qib | Lub Npe | Cov yam ntxwv tseem ceeb | Hom Max Siv Temp * |
|---|---|---|---|
| SA-213 T11 | 1.25Cr-0.5Mo | Zoo zog, oxidation kuj. Qib kawm ua haujlwm. | ~ 550℃(1020℃F) |
| SA-213 T22 | 2.25Cr-1Mo | Cov qib classic rau siab -kev pabcuam kub. | ~ 565℃(1050℃F) |
| SA-213 T23 | 2.25Cr-1.6W-V-Cb | Txhim kho lub zog & weldability vs. T22. | ~ 580℃(1075℃F) |
| SA-213 T91 | 9Cr-1Mo-V | Siab zog thiab corrosion kuj tshaj T23. | ~ 600℃(1110℃F) |
| SA-213 T92 | 9Cr-0.5Mo-1.8WV | Txawm tias muaj zog ntau dua li T91 (tus "super" T91). | ~ 620℃(1150℃F) |
* Ceebtoom: Kev siv qhov kub siab tshaj plaws yog nyob ntawm kev ntxhov siab thiab tsim lub neej.
Kev txiav txim siab tseem ceeb rau Fabrication thiab siv
Kev kho cua sov:T23 tubes tau muab rau hauvnormalized thiab temperedmob kom ua tiav qhov xav tau microstructure thiab mechanical zog.
Vuam:Thaum nws muaj qhov zoo tshaj plaws weldability, nws yog ib qho tseem ceeb heev uas yuav tsum tau siv cov hlau sib txuam (xws li, ER90S-B3 rau TIG, E9015-B3 rau SMAW).Post Weld Thaum tshav kub kub kho (PWHT)Nws yog qhov yuav tsum tau ua kom txo qis kev ntxhov siab thiab ua tiav qhov xav tau kom muaj zog nyob rau hauv tshav kub -Tebchaws cuam tshuam (HAZ).
Corrosion Resistance:Nws cov ntsiab lus chromium muab kev ua haujlwm zoo rau oxidation thiab chav corrosion, tab sis nws tsis haum rau ib puag ncig uas muaj cov tshuaj chloride lossis sulfur siab, qhov twg stainless hlau yuav tsum tau.
Cov ntsiab lus
SA-213 T23 yog qhov siab-kev ua tau zoo, qis- alloy boiler raj steel uas muaj qhov zoo sib npaug ntawm siab- kub lub zog, fabrication yooj yim (tshwj xeeb tshaj yog vuam), thiab tus nqi-zoo.Nws yog ib qho kev txhim kho tseem ceeb uas txuas rau qhov sib txawv ntawm cov tsoos qis- alloy steels zoo li T22 thiab ntau dua 9-12% chromium steels, ua rau lub cim tshiab ntawm cov khoom siv hluav taws xob zoo dua thiab huv dua.
