10Cr11MoW2VNbCu1BN steel, feem ntau paub thoob ntiaj teb liQib P122(los yog T122 rau cov raj), yog siab -chromium martensitic tshav kub- resistant steel. Nws tau tsim tshwj xeeb los ua kom tau raws li qhov xav tau ntawm cov niaj hnub, siab -kev ua haujlwm thermal fais fab nroj tsuag.
1. Kev siv thawj zaug thiab kev siv
P122 steel kav tsuas yog tsim los rau siab -kub thiab siab - ntu siab ntawm lub zog tsim boilers, tshwj xeeb tshaj yog nyob rau hauvultra-supercritical (USC) fais fab nroj tsuag. Lawv cov ntawv thov tseem ceeb suav nrog:
Superheaters thiab Reheaters:Cov no yog cov hlab ntsha nyob rau hauv qhov kub tshaj plaws ntawm lub boiler, qhov twg chav yog rhuab mus rau nws qhov kawg kub. P122 yog siv nyob rau hauv cov theem kawg ntawm cov khoom no qhov kub thiab corrosion yog heev hnyav.
Main Steam thiab Kub Reheat Chav Pipes:Cov no yog cov kab loj - txoj kab uas hla uas thauj lub siab - lub zog ntawm lub boiler mus rau chav turbine. P122 lub zog siab tso cai rau cov phab ntsa ntawm cov yeeb nkab nyias, txo cov thermal stress thiab cov nqi khoom.
Headers thiab Manifolds:Cov khoom no sau thiab faib cov chav hauv lub boiler system, ua haujlwm nyob rau hauv siab heev.
Hauv qhov tseeb, P122 yog acov khoom tseem ceebua kom cov nroj tsuag fais fab ua haujlwm ntawm chav kub saum toj no600 degree, uas yog qhov tseem ceeb rau kev ua tau zoo dua.
2. Qhov tseem ceeb thiab cov txiaj ntsig zoo
Cov muaj pes tsawg leeg ntawm P122 muab kev sib xyaw ua ke zoo tshaj ntawm cov khoom piv rau nws cov neeg ua ntej (xws li P91 thiab P92):
Zoo heev Creep Strength:Cov tshuaj lom neeg muaj pes tsawg leeg, suav nrog Tungsten (W), Molybdenum (Mo), Vanadium (V), thiab Niobium (Nb), tsim cov microstructure ruaj khov uas tiv taus deformation nyob rau hauv kev ntxhov siab thiab kub ntev ntev (ceep). Qhov no tso cai rau tsim kom muaj siab dua - cov tshuab siab.
Superior Oxidation thiab Corrosion Resistance:Lub siab Chromium (Cr) cov ntsiab lus ntawm ib ncig ntawm 11% tsim ib txheej tuab thiab tiv thaiv chromium oxide txheej ntawm cov hlau nto. Qhov no muab tshwj xeeb tsis kam rau oxidation (scaling) nyob rau hauv qhov chaw ib puag ncig thiab corrosion los ntawm flue gases, ho txuas ntxiv lub neej.
Zoo Microstructural Stability:Qhov sib ntxiv ntawm tooj liab (Cu) thiab Boron (B) txhim khu kev ruaj ntseg ntawm cov hlau cov qauv martensitic thaum lub sij hawm ntev - raug rau qhov kub thiab txias, tiv thaiv kom tsis muaj zog ntxov ntxov.
Txhim kho Thermal Fatigue Resistance:Nws sib npaug thermal expansion thiab conductivity zog pab nws tiv taus cov kev ntxhov siab vim los ntawm thermal cycling (startups thiab shutdowns).
3. Kev Txhim Kho Yav Tom Ntej
Lub neej yav tom ntej ntawm P122 yog txuas nrog rau lub ntiaj teb lub zog tiam sis:
Lub luag haujlwm hauv Kev Hloov Hloov Hluav Taws Xob:Raws li lub ntiaj teb hloov mus rau lub zog tauj dua tshiab, muaj kev xav tau ntau ntxiv rau cov khoom siv hluav taws xob zoo, hloov tau yooj yim- cov nroj tsuag roj hluav taws xob los muab lub zog ruaj khov. P122-raws li USC cov nroj tsuag tuaj yeem ua qhov no nrog qis CO₂ emissions ib megawatt-teev tshaj cov laus, cov nroj tsuag tsis muaj txiaj ntsig, ua rau lawv yog "choj" thev naus laus zis tseem ceeb.
Kev sib tw los ntawm Cov Khoom Siv Tshiab:Txoj kev loj hlob zeem muag rau P122 yog kev sib tw los ntawm qhov tshwm sim ntawmtom ntej no - tiam nickel-raws li superalloys(piv txwv li, Inconel 740H) uas yog tsom rau 700℃+ qib siab USC cov nroj tsuag. Txawm li cas los xij, cov alloys no tseem kim dua.
Tsim Niche hauv 620-650℃Range:Rau yav tom ntej, P122 tseem yog atus nqi- siv tau zoo thiab thev naus laus zis kev daws teeb meemrau USC cov nroj tsuag tshiab tsim nrog chav kub txog li 650 degree, tshwj xeeb tshaj yog nyob rau hauv kev lag luam tawm tshiab. Nws muaj qhov sib npaug zoo ntawm kev ua tau zoo thiab tus nqi piv rau superalloys.
Tsom ntsoov rau Kev Ntseeg thiab Kev Txhim Kho Lub Neej:Tam sim no R&D tsom tsis yog hloov P122 tab sis ntawm kev ua kom zoo dua nws cov txheej txheem vuam, nkag siab txog nws lub sijhawm ntev - tus cwj pwm kev laus, thiab tsim txoj hauv kev los ntsuas qhov seem ntawm lub neej ntawm cov khoom hauv kev pabcuam. Qhov no ua kom muaj kev nyab xeeb thiab txhim khu kev qha ntawm USC fais fab nroj tsuag uas twb muaj lawm thiab tshiab rau xyoo lawm.
Hauv kev xaus,10Cr11MoW2VNbCu1BN (P122)yog ib qho khoom siv pob zeb uas tau ua kom muaj kev vam meej hauv kev cog hluav taws xob. Txawm hais tias nws yuav ntsib kev sib tw rau qhov siab tshaj - qhov kub thiab txias tsim ntawm lub neej yav tom ntej, nws cov khoom zoo tshaj plaws thiab cov saw hlau tsim kom ntseeg tau tias nws yuav yog cov khoom tseem ceeb rau kev lag luam hluav taws xob thoob ntiaj teb nyob rau nruab nrab mus rau ntev.
