Thawj Daim Ntawv Thov hauv Ultra-Supercritical Boilers
07Cr25Ni21NbN, kev lag luam hu ua Super304H, yog qib siab austenitic stainless hlau tsim los rau qhov kub siab tshaj plaws ntawm cov thee- hluav taws xob fais fab nroj tsuag. Nws thawj daim ntawv thov yog nyob rau hauv kev tsim ntawm kawg -theem superheater thiab reheater raj. Nyob rau hauv ib qho ultra-supercritical boiler, chav ntsuas kub ncav cuag 600 txog 625 degrees C. Ntawm qhov kub thiab txias siab, cov pa steels tsis muaj qhov tsim nyog lub zog thiab corrosion tsis kam, thiab Super304H tau muab tso rau hauv qhov chaw uas cov pa kub tshaj plaws.
Exceptional High -Tsub Muaj Zog
Los ntawm cov txheej txheem txhawb zog uas muaj peev xwm cuam tshuam nrog nag lossis daus ntawm nano- tooj liab loj- nplua nuj hais, niobium carbonitrides, thiab M23C6 carbides, Super304H ua tiav lub zog creep rupture kwv yees li 30 feem pua siab dua li cov pa TP304H thiab TP.347H steels. Qhov no tso cai rau tus tsim ntawm thinner- cov phab ntsa phab ntsa, uas txhim kho cov cua sov hloov thiab txo cov thermal stress.
Superior Chav Oxidation Resistance
The steel forms a dense, adherent, protective chromium oxide scale on its inner surface, which significantly slows further oxidation when exposed to high-temperature steam. Qhov no txuas lub raj lub neej kev pab cuam thiab tiv thaiv qhov spalling ntawm oxide nplai, uas tuaj yeem ua rau muaj kev puas tsuaj rau hauv cov turbine nqes hav.
Structural Stability thiab Fabricability
Cov hlau tuav nws cov microstructural stability nyob rau lub sij hawm ntev, ntau tshaj 100,000 teev, nyob rau hauv kev ntxhov siab ntawm qhov kub thiab txias, kom ntseeg tau zoo ib yam ntawm cov nroj tsuag tsim lub neej. Nws muaj qhov txaus siab weldability thiab formability, tso cai rau kev tsim kho thiab kho cov khoom siv boiler complex.
Txoj Kev Loj Hlob
Super304H tau dhau los ua tus qauv, zoo- nkag siab cov ntaub ntawv rau 600 txog 620 ° C chav ntsuas kub thiab tseem yuav yog cov khoom xaiv rau cov uas twb muaj lawm thiab tshiab - tsim ultra- cov nroj tsuag supercritical. Rau lub neej-cov kev pabcuam txuas ntxiv ntawm cov chav nyob uas twb muaj lawm, nws yog cov khoom siv hloov pauv tseem ceeb rau cov khoom siv hluav taws xob tseem ceeb thiab cov khoom siv rov ua dua tshiab. Tom ntej no- tiam dhau los ultra{10}} cov nroj tsuag supercritical tsom qhov kub ntawm qhov kub siab tshaj 700 degrees C yuav xav tau npib tsib xee{12}}raws li alloys, tab sis Super304H tseem yog ib qho cuab yeej siv rau niaj hnub no siab - cov nroj tsuag muaj txiaj ntsig.
Cov lus nug nquag
Q: Super304H yog dab tsi?
A: Super304H, xaiv 07Cr25Ni21NbN nyob rau hauv Suav system, yog ib tug advanced austenitic stainless hlau rau ultra-supercritical boiler superheater thiab reheater raj.
Q: Vim li cas Super304H muaj zog ntawm qhov kub thiab txias?
A: Nano-loj tooj liab- nplua nuj precipitates, niobium carbonitrides, thiab M23C6 carbides ntxiv dag zog rau matrix, muab txog 30 feem pua siab dua creep rupture zog dua TP304H.
Q: Dab tsi kub ntau yog Super304H tsim rau?
A>Nws yog tsim los rau chav kub ntawm 600 txog 625 degrees C hauv ultra-supercritical boilers.
Q: Super304H tiv thaiv chav oxidation li cas?
A: Nws tsim ib qhov ntom ntom chromium oxide nplai ntawm sab hauv sab hauv uas ua rau qeeb oxidation ntxiv thiab tiv thaiv nplai spilling rau hauv lub turbine.
Q: Cov ntsiab lus carbon ntawm 07Cr25Ni21NbN yog dab tsi?
A: Qhov kev xaiv qhia txog 0.07 feem pua carbon nrog 25 feem pua chromium thiab 21 feem pua nickel, stabilized nrog niobium thiab nitrogen.
Q: Super304H puas tuaj yeem welded?
A: Yog, nws muaj kev txaus siab weldability thiab formability, nrog rau cov txheej txheem vuam tsim nyog rau boiler siab qhov chaw.
Rau Super304H cov lus hais nrog qhov loj thiab cov kev xeem,tiv tauj peb pab neeg muag khoom.
