1. Cov Khoom Muag Khoom
12Cr3MoVSiTiB (tseem paub raws li tus qauv GB 5310) yog Suav -tsim pearlitic kub- lub zog steel. Nws lub npe nthuav tawm nws cov tshuaj complex, uas suav nrog Chromium (Cr), Molybdenum (Mo), Vanadium (V), Silicon (Si), Titanium (Ti), thiab Boron (B). Qhov no multi-element alloying system yog tsim los ua kom muaj zog tshwj xeeb thiab ruaj khov ntawm qhov kub siab, feem ntau nyob rau hauv thaj tsam ntawm 600-620℃.
2. Kev siv thawj zaug thiab kev siv
Cov hlau no tsuas yog siv nyob rau hauv siab - kub thiab siab - qhov chaw siab, feem ntau nyob hauv lub zog tsim hluav taws xob. Nws cov ntawv thov tseem ceeb suav nrog:
Superheater thiab Reheater Tubes:Cov no yog cov khoom tseem ceeb hauv cov roj fossil- hluav taws xob cog boilers qhov chaw uas cov ncu tau rhuab mus rau qhov kub siab tshaj plaws . 12Cr3MoVSiTiB kav dej tiv taus kub thiab siab.
Siab -Tsuas Kub Cov Yeeb Nkab thiab Lub Taub Hau:Nws yog siv rau cov kab tseem ceeb uas nqa cov chav superheated los ntawm boiler mus rau lub turbine.
Thaum tshav kub kub Exchangers:Hauv lwm qhov chaw muaj kev lag luam uas xav tau kev sib pauv cua sov zoo raws li qhov xav tau.
3. Qhov tseem ceeb thiab cov txiaj ntsig zoo
Cov ntau-alloy muaj pes tsawg leeg ntawm 12Cr3MoVSiTiB muab ntau yam zoo dua chromium yooj yim dua-molybdenum steels:
Zoo heev High -Temperature Strength:Nws muaj qhov zoo tshaj plaws creep rupture lub zog, txhais tau hais tias nws tuaj yeem tiv taus qhov kev ntxhov siab tas li ntawm qhov kub thiab txias yam tsis muaj deforming lossis tsis ua haujlwm ntev (piv txwv li, 100,000 teev). Qhov no tso cai rau kev tsim cov txheej nyias nyias- cov kav dej uas muaj phab ntsa, uas txhim kho cov cua sov ua haujlwm.
Zoo Oxidation Resistance:Cov ntsiab lus chromium tsim ib qho ruaj khov, tiv thaiv oxide txheej (Cr₂O₃) rau ntawm qhov chaw, uas ua rau qeeb qeeb ntxiv oxidation (scaling) hauv qhov chaw ib puag ncig.
Txhim kho Microstructural Stability:Qhov sib ntxiv ntawm cov ntsiab lus xws li Vanadium (V), Titanium (Ti), thiab Boron (B) txhawb kev tsim cov carbides ruaj khov thiab carbonitrides (xws li VC, TiC). Cov precipitates zoo no inhibit grain loj hlob thiab dislocation txav thaum lub sij hawm ntev - raug tshav kub, tswj cov khoom ncaj ncees.
Tus nqi -Kev ua tau zoo rau cov ntawv thov tshwj xeeb:Piv rau cov khoom kim heev austenitic stainless hlau (xws li 304H, 347H) lossis siab dua - qib martensitic steels (xws li P91), 12Cr3MoVSiTiB muab qhov sib npaug zoo ntawm kev ua tau zoo thiab tus nqi rau sub- tseem ceeb thiab qee qhov tseem ceeb ntawm cov nroj tsuag tsis muaj zog.
4. Txoj Kev Loj Hlob thiab Kev Sib Tw
Lub neej yav tom ntej ntawm 12Cr3MoVSiTiB yog ze rau lub ntiaj teb lub zog toj roob hauv pes:
Lub luag hauj lwm Niche nyob rau hauv uas twb muaj zog Infrastructure:Nws tseem yog cov khoom siv tseem ceeb rau kev saib xyuas, kho, thiab lub neej- txuas ntxiv ntawm cov khoom siv hluav taws xob uas twb muaj lawm -tseem ceeb thiab supercritical fais fab nroj tsuag tau tsim hauv Suav teb ob peb xyoos dhau los. Qhov kev thov rau cov khoom hloov pauv yuav nyob mus ib txhis.
Kev sib tw los ntawm Advanced Martensitic Steels:Txoj kev loj hlob ntawm kev tsim hluav taws xob niaj hnub yog mus rauUltra -Supercritical (USC)thiab Advanced Ultra-Supercritical (A{1}}USC) cov nroj tsuag, uas ua haujlwm ntawm qhov kub thiab txias (Ntau dua lossis sib npaug li 620 degree) thiab ua kom muaj zog kom ua tau zoo dua thiab qis dua emissions. Rau cov xwm txheej no,9-12% chromium martensitic hlaunyiamP91, P92, thiab P911feem ntau nyiam vim lawv cov creep ntau zog thiab zoo weldability.
Kev sib tw hauv Weldability thiab Fabrication:Zoo li ntau cov hlau alloyed heev, 12Cr3MoVSiTiB yuav tsum muaj kev tswj xyuas nruj ntawm cov txheej txheem vuam thiab tom qab-weld kho cua sov (PWHT) kom tsis txhob tawg thiab ua kom cov vuam sib koom ua ke cov khoom sib xws ntawm cov hlau hauv qab. Qhov kev nyuaj no tuaj yeem yog qhov tsis zoo piv rau cov niaj hnub, weld- optimized alloys.
Outlook:Txawm hais tias nws tsis zoo li yuav yog qhov kev xaiv tseem ceeb rau hom -tshiab, xeev- ntawm -- art USC fais fab nroj tsuag,12Cr3MoVSiTiB tseem yuav tuav lub luag haujlwm tseem ceeb raws li kev ua haujlwm siab -kev ua tau zoo, tus nqi- kev daws teeb meem zoo rau cov ntawv thov tshwj xeeb siab - kub nyob rau hauv nws cov qauv tsim, tshwj xeeb tshaj yog nyob rau hauv Suav teb fais fab kev lag luam thiab lwm cheeb tsam nrog cov infrastructure zoo sib xws.
Hauv cov ntsiab lus,12Cr3MoVSiTiB sawv cev rau kev ua tiav tseem ceeb hauv metallurgical engineering rau nws lub sijhawm, muab cov tshuaj muaj zog rau kev ua haujlwm siab - kub. Thaum cov ntaub ntawv tshiab tab tom thawb cov ciam teb ntawm kev ua tau zoo, nws zoo - nkag siab txog cov khoom thiab cov saw hlau tsim kom ntseeg tau tias nws yuav muaj feem cuam tshuam rau kev saib xyuas thiab kev ua haujlwm ntawm lub nkoj loj ntawm cov chaw tsim hluav taws xob thoob ntiaj teb.
