1. Cov ntawv thov thiab kev siv tseem ceeb
12Cr2MoG (raws li ASTM A335 P22 / A213 T22) yog chromium -molybdenum ferritic alloy steel tshwj xeeb tsim rau siab -kub siv. Nws txoj kev siv tseem ceeb yog nyob rau hauv kev tsim cov roj fossil thiab thermal fais fab nroj tsuag, nrog rau hauv cov chaw petrochemical. Cov ntawv thov tseem ceeb suav nrog:
Fais fab Plant Piping Systems:Nws yog dav siv rau kev tsim khoomsuperheater thiab reheater tubes, cov kav dej loj, thiabtaub hauhauv boilers. Cov khoom no yog qhov tseem ceeb rau kev xa cov pa ntawm qhov kub thiab txias.
Petrochemical Kev Lag Luam:Siv nyob rau hauv refinery khoom xws lihydrocracking unitsthiabcatalytic hloov kho units, qhov twg cov khoom raug raug kub siab thiab hydrogen - muaj ib puag ncig.
High -Tsuas Kub Siab Nkoj:Haum rau qhov chaw ntawm cov hlab ntsha uas ua haujlwm ntawm qhov kub siab, qhov uas yuav tsum tau tiv thaiv kom nkag mus (qeeb deformation nyob rau hauv qhov kev ntxhov siab tas li) yuav tsum tau.
Qhov tseem ceeb, 12Cr2MoG yog cov khoom ntawm kev xaiv rau lub siab tseem ceeb-cov kabmob ua haujlwm hauv qhov kub thiab txias520℃rau 580℃(968℃F txog 1076℃F).
2. Qhov tseem ceeb thiab cov txiaj ntsig zoo
Kev siv dav dav ntawm 12Cr2MoG yog vim nws qhov zoo- sib npaug ntawm cov khoom, uas ua rau nws muaj kev ntseeg tau tshwj xeeb rau cov kev xav tau:
Zoo heev High -Temperature Strength thiab Creep Resistance:Qhov sib ntxiv ntawm chromium (kwv yees . 2.25%) thiab molybdenum (kwv yees . 1%) tsim cov carbides zoo, ruaj khov nyob rau hauv cov hlau microstructure. Qhov no zoo tiv thaiv deformation thiab tsis ua haujlwm nyob rau lub sijhawm ntev hauv kev ntxhov siab thiab kub, qhov tshwm sim hu ua creep.
Zoo Oxidation thiab Corrosion Resistance:Cov ntsiab lus chromium tsim ib qho kev tiv thaiv, adherent oxide txheej (Cr₂O₃) ntawm qhov chaw, uas ua rau qeeb oxidation ntxiv (scaling) nyob rau hauv chav thiab flue gas ib puag ncig. Nws kuj muaj kev txhim kho kev tiv thaiv rau hydrogen nres piv rau carbon steels.
Superior Thermal Stability thiab Microstructural Integrity:Cov hlau no tuav nws cov khoom siv kho tshuab thiab microstructure nyob rau lub neej ua haujlwm ntev, tiv thaiv kev degradation xws li spheroidization thiab graphitization.
Zoo Weldability thiab Fabricability:Piv nrog rau cov hlau alloy siab dua, 12Cr2MoG muaj qhov zoo weldability. Nrog rau kev tsim nyog ua ntej- cua sov, tom qab-weld heat treatment (PWHT), thiab tsim cov txheej txheem vuam, nws tuaj yeem tsim kev ntseeg siab rau hauv cov kav dej.
Tus nqi -Kev ua tau zoo:Nws muaj qhov zoo sib npaug ntawm kev ua tau zoo thiab tus nqi. Rau nws qhov kev pabcuam kub, nws yog kev lag luam ntau dua li cov hlau zoo li P91 lossis P92, thaum muab kev ua haujlwm zoo tshaj plaws rau cov hlau.
3. Kev Txhim Kho Yav Tom Ntej
Thaum cov ntaub ntawv tshiab tshiab tau tshwm sim, 12Cr2MoG tseem tuav txoj haujlwm tseem ceeb thiab ruaj khov hauv ntiaj teb kev lag luam toj roob hauv pes. Nws lub zeem muag yav tom ntej yog zoo li tus qauv hauv qab no:
Sustained Demand nyob rau hauv uas twb muaj lawm thiab tshiab zog Infrastructure:Kev hloov pauv hluav taws xob thoob ntiaj teb yog txheej txheem maj mam. Ntau cov thee uas twb muaj lawm- cov chaw tsim hluav taws xob hluav taws xob, uas muaj ntau xyoo lawm - lub neej ntev, yuav tsum tau 12Cr2MoG rau kev tu, kho, thiab lub neej- cov haujlwm txuas ntxiv. Tsis tas li ntawd, cov chaw tsim hluav taws xob tshiab, tshwj xeeb tshaj yog nyob rau hauv cov cheeb tsam tsim kho, tseem siv qhov kev ntseeg siab thiab raug nqi - cov khoom siv tau zoo.
Lub luag haujlwm tseem ceeb hauv Petrochemical Sector:Qhov kev thov loj hlob rau cov roj thiab roj refining, nrog rau kev ua tshuaj lom neeg, ua kom muaj kev xav tau ruaj khov rau 12Cr2MoG hauv cov tshuab hluav taws xob, cov khoom siv hluav taws xob, thiab cov kab hloov pauv.
Irreplaceable rau Retrofit thiab Life-Extension Projects:Thaum cov chaw tsim hluav taws xob qub lossis cov chaw tsim khoom lag luam raug kho dua tshiab rau kev txhim kho kev ua haujlwm zoo lossis kev ua haujlwm txuas ntxiv, 12Cr2MoG tseem yog tus qauv thiab kev ntseeg siab rau kev hloov cov khoom kub ntawm - kub, raws li nws cov khoom thiab tus cwj pwm zoo - nkag siab los ntawm engineers.
Niche Transition, Tsis Hloov Tag Nrho:Thaum ultra-supercritical (USC) fais fab nroj tsuag ua haujlwm siab tshaj 600℃yog nce siv qib zoo li P91, P92, thiab txawm tias stainless hlau, 12Cr2MoG tseem yog cov khoom tseem ceeb rau sub- tseem ceeb thiab supercritical sectors. Lub ntiaj teb lub zog sib xyaw ua kom ntseeg tau tias cov haujlwm no yuav nyob twj ywm rau yav tom ntej.
Xaus:
12Cr2MoG tsis yog cov khoom siv yav dhau los, tab sis aproven thiab enduring workhorsentawm kev lag luam niaj hnub. Nws zoo heev ua ke ntawm siab - kub khoom, fabricability, thiab tus nqi - kev ua tau zoo piv ruaj ntseg nws lub luag hauj lwm raws li ib tug pob zeb pob zeb cov ntaub ntawv rau siab - kub, siab - kev siv siab. Nws lub neej yav tom ntej tseem ci ntsa iab, anchored nyob rau hauv kev saib xyuas ntawm lub ntiaj teb no lub zog infrastructure thiab nws txuas ntxiv siv nyob rau hauv cov txheej txheem tseem ceeb.
