12CrMoG yog dab tsi
12CrMoG yog chromium-molybdenum alloy steel yeeb nkab tau teev tseg hauv Suav tus qauv GB 5310, tus qauv rau seamless steel raj rau siab - siab boilers. Lub npe nyeem: 12 rau cov ntsiab lus ntawm cov pa roj carbon monoxide ntawm 0.12%, Cr rau chromium, Mo rau molybdenum, thiab G rau boiler daim ntawv thov. Cov hlau yog tsim los rau cov khoom siv uas ua haujlwm nyob rau hauv kev kub siab ntawm qhov kub siab, qhov twg carbon steel yuav soften thiab scale, thiab nws yog ib qho ntawm cov khoom siv tseem ceeb ntawm lub hwj chim - tiam thiab petrochemical industries.
Tshuaj muaj pes tsawg leeg
Qhov tseeb muaj pes tsawg leeg ntawm 12CrMoG ib GB 5310 yog hais txog 0.08 mus rau 0.15% carbon, 0.40 mus rau 0.70% manganese, 0.17 mus rau 0.37% silicon, 0.40 mus rau 0.70% chromium, thiab 0.40 mus rau 0.55% sulfur thiab molybdenum. 0.030% txhua. Cov ntsiab lus chromium ntawm qib yog kwv yees li 0.5%, tsis yog nyob rau hauv 0.8 mus rau 1.1% ntau yam, uas belongs rau qhov siab dua -alloy 15CrMoG. Cov molybdenum muab cov khoom muaj zog- kev daws teeb meem ntxiv zog thiab nkag mus, thiab chromium ntxiv oxidation kuj thiab hardenability.
Cov khoom siv rau High -Tub Txias Kev Pabcuam
Tus nqi ntawm 12CrMoG yog nyob rau hauv nws siab -kub kev ua haujlwm. Qhov sib ntxiv ntawm molybdenum zoo txhim kho qhov kev tiv thaiv rau kev nkag mus, qeeb deformation nyob rau hauv qhov kev ntxhov siab tas li ntawm qhov kub thiab txias, uas ua kom lub sijhawm ntev - lub sij hawm kev ncaj ncees ntawm lub boiler Cheebtsam. Cov chromium nce qhov tsis kam mus rau oxidation thiab scaling piv nrog cov pa roj carbon steel xws li 20G, thiab cov tswj muaj pes tsawg leeg tuav ib tug ruaj khov ferritic -pearlitic microstructure thaum lub sij hawm ntev raug. Chav tsev- kub yog qhov tsawg kawg nkaus tensile lub zog ntawm li 410 txog 560 MPa thiab lub zog tawm los ntawm li 255 MPa rau cov tuab tuab, nrog rau qhov siab siab - qhov ntsuas kub tsim los ntawm tus qauv thiab tus qauv tsim.
Daim ntawv thov
12CrMoG yeeb nkab yog siv nyob rau hauv lub hwj chim- cog boilers rau superheater raj ua hauj lwm ntawm hlau kub txog li 540 C, reheater tubes, siab - kub headers, thiab lub ntsiab chav thiab kub-reheat piping nyob rau hauv sub- cov nroj tsuag tseem ceeb, thiab tshav kub- cov hlab pauv. Hauv kev lag luam petrochemical nws ua haujlwm rau cov hlab ntsha siab thiab cov reactors nyob rau hauv siab - kev pabcuam kub thiab cua sov- hloov cov kav dej hauv cov chaw ua kom zoo thiab cov nroj tsuag tshuaj, suav nrog hydrogenation units thiab ethylene crackers. Cov hlau yog cov khoom ntawm kev xaiv rau lub siab tseem ceeb-cov kabmob uas muaj qhov siab siab thiab nruab nrab mus rau qhov kub thiab txias.
Vuam thiab Fabrication
12CrMoG muab cov weldability zoo nrog cov preheating tsim nyog thiab tom qab-weld heat treatment. Lub preheat yog ib txwm nyob rau hauv thaj tsam ntawm 150 mus rau 250 C, qhov kev sib tshuam kub yog tswj, thiab tom qab-weld kev kho cua sov ntawm li 650 mus rau 700 C yog siv rau siab welds kom temper lub tshav kub- cuam tshuam cheeb tsam thiab txo kev ntxhov siab. Cov hlau muab tub lim sib phim rau Cr-Mo muaj pes tsawg leeg, thiab cov vuam raug tshuaj xyuas los ntawm cov txheej txheem tsis yog{11}}kev puas tsuaj ntawm txoj cai. Cov hlau tseem tuaj yeem tsim thiab khoov tau yooj yim, uas haum rau kev tsim cov txheej txheem boiler.
12CrMoG vs 15CrMoG
15CrMoG muaj ntau dua chromium, txog 0.80 mus rau 1.10%, thiab cov ntsiab lus molybdenum zoo sib xws, uas ua rau nws siab dua - kub lub zog thiab oxidation tsis kam, tso cai rau cov kev pab cuam rau qhov kub thiab txias me ntsis. Nws kim dua . 12CrMoG yog qhov kev xaiv pheej yig uas nws cov khoom txaus txaus, thiab ob qib raug xaiv los ntawm qhov ntsuas kub thiab tus nqi. Rau cov nroj tsuag ultra-supercritical, yuav tsum muaj qib 9Cr qib siab P91 thiab P92, uas txwv tsis pub 12CrMoG rau cov khoom lag luam thiab kev saib xyuas.
Market Outlook
Qhov kev thov rau cov tshiab sub- cov nroj tsuag tseem ceeb tau poob qis nrog kev hloov mus rau lub zog tauj dua tshiab, tab sis cov nkoj uas twb muaj lawm ntawm cov thee- raug rho tawm haujlwm thiab cov nroj tsuag biomass xav tau kev saib xyuas tas li thiab lub neej- txuas ntxiv retrofits, uas ua rau 12CrMoG nyob rau hauv qhov kev thov tsis tu ncua rau cov khoom seem. Kev lag luam petrochemical txuas ntxiv nthuav dav, thiab qib qhov tsim nyog rau siab - cov txheej txheem kub tau txhawb nqa nws qhov kev thov. Thaum kev hloov pauv mus rau ultra- thev naus laus zis supercritical txo nws lub luag haujlwm hauv cov haujlwm tseem ceeb ntawm lub zog tshiab, 12CrMoG tseem yog qhov ua pov thawj thiab kev lag luam ua haujlwm rau cov xwm txheej tsawg dua.
Cov lus nug nquag
Q: 12CrMoG steel yog dab tsi?
Ib qho chromium-molybdenum alloy steel yeeb nkab ntawm GB 5310 rau siab -siab boiler kev pabcuam ntawm qhov kub siab.
Q: Dab tsi yog qhov muaj pes tsawg leeg ntawm 12CrMoG?
Txog 0.08 txog 0.15% carbon, 0.40 txog 0.70% chromium, thiab 0.40 txog 0.55% molybdenum, nrog rau chromium nyob ib ncig ntawm 0.5%, tsis nyob rau hauv 15CrMoG ntau yam.
Q: Dab tsi kub 12CrMoG pab?
Superheater tubes txog li 540 C, nrog rau siab - qhov ntsuas kub tsim los ntawm GB 5310 thiab tus qauv tsim.
Q: Yuav ua li cas yog 12CrMoG welded?
Nrog preheat ntawm 150 mus rau 250 C, tswj qhov kub thiab txias, sib piv Cr-Mo muab tub lim, thiab tom qab-weld kev kho cua sov ntawm li 650 txog 700 C.
Q: Qhov txawv ntawm 12CrMoG thiab 15CrMoG yog dab tsi?
15CrMoG muaj ntau dua chromium (0.80 mus rau 1.10%), muab siab dua - kub lub zog ntawm tus nqi siab dua.
Q: 12CrMoG siv rau dab tsi?
Superheater thiab reheater tubes, headers, main steam kab, thiab petrochemical siab -kub kav.
