Cov khoom txhais thiab cov yam ntxwv tseem ceeb
15CrMoG yog chromium-molybdenum alloy steel yeeb nkab tshwj xeeb tsim los rau siab - kub thiab siab - kev pabcuam siab. Tsab ntawv G nyob rau hauv nws lub npe sawv cev rau boiler zoo, qhia nws thawj siv nyob rau hauv boiler thiab siab hlab ntsha daim ntaub ntawv, thiab qib yog standardized nyob rau hauv GB 5310 nrog ib tug thoob ntiaj teb counterpart nyob rau hauv 1Cr-0.5Mo class. Nws cov yam ntxwv tseem ceeb yog kev sib xyaw ua ke ntawm siab - qhov kub thiab txias tsis kam, ua tiav los ntawm cov ntsiab lus chromium ntawm kwv yees li 0.80 txog 1.10 feem pua thiab molybdenum cov ntsiab lus ntawm 0.40 txog 0.55 feem pua. Chromium txhim kho oxidation thiab corrosion kuj ntawm qhov kub thiab txias, thaum molybdenum nce lub zog thiab nkag siab tsis kam. Ua ke lawv ua rau qib txhim khu kev qha rau kev ua haujlwm mus sij hawm ntev hauv kev xav tau ib puag ncig thermal, ntawm cov khoom siv nqi qis dua li ntawm 9 feem pua chromium lossis austenitic steels.
Kev siv thiab kev siv tseem ceeb
15CrMoG yeeb nkab yog siv feem ntau nyob rau hauv lub tsim hluav taws xob thiab petrochemical industries, nyob qhov twg cov Cheebtsam raug kub thiab siab nyob rau tib lub sij hawm.
Superheater tubes uas kub saturated chav rau hauv superheated chav
Reheater raj uas xa rov qab los ntawm lub turbine rau kev ua haujlwm ntxiv
Siab -kub taub hau thiab cov kav dej nkev uas sib sau thiab thauj siab -siab zog
Cov kav dej tseem ceeb nqa chav los ntawm lub boiler mus rau lub turbine
Thaum tshav kub kub exchanger raj nyob rau hauv reactors thiab exchangers uas ua hauj lwm ntawm siab kub
Cov txheej txheem kav dej thauj cov roj kub, roj thiab lwm cov txheej txheem dej
Cov hlab ntsha siab uas yuav tsum tiv taus ob qho tib si siab thiab kub siab
Nyob rau hauv txhua txoj haujlwm no, qib raug xaiv vim nws tuav nws cov khoom los ntawm kev ua haujlwm tas mus li ntau xyoo es tsis yog vim muaj ib qho zoo heev.
Qhov tseem ceeb thiab cov txiaj ntsig
Kev siv dav dav ntawm 15CrMoG yog tsav los ntawm ntau cov txiaj ntsig kev lag luam thiab nyiaj txiag. Nws tuav nws cov neeg kho tshuab kev ncaj ncees nyob rau hauv tas li siab - qhov kev pab cuam kub thiab tsis soften los yog deform yooj yim. Nws txoj kev tawm tsam, lub peev xwm los tiv thaiv qeeb deformation nyob rau hauv qhov kev ntxhov siab tas li ntawm qhov kub thiab txias, yog cov cuab yeej uas ua rau ntev - lub sij hawm kev nyab xeeb ntawm cov qauv. Cov ntsiab lus chromium tsim cov txheej txheem tiv thaiv oxide ruaj khov rau ntawm qhov chaw, tiv thaiv kom nrawm nrawm hauv qhov chaw oxidising. Piv nrog rau qib siab dua - alloy qib, nws muaj qhov zoo weldability thiab processability: nrog preheating thiab post-weld cua sov kho nws yuav fabricated rau hauv complex Cheebtsam ntseeg tau. Thaum kawg, nws muaj qhov zoo sib npaug ntawm tus nqi thiab kev muaj peev xwm, muab kev txhim kho tseem ceeb ntawm cov pa roj carbon steel tsis muaj kev siv nyiaj ntawm cov qib siab chromium steels.
Kev Txhim Kho Kev Zeem Muag thiab Kev Lag Luam Yav Tom Ntej
Lub neej yav tom ntej ntawm 15CrMoG yog zoo li lub ntiaj teb no lub zog toj roob hauv pes, uas yog txav mus rau ntau dua efficiency thiab qis emissions. Hauv ntau lub teb chaws tshiab subcritical thiab supercritical thee- cov hluav taws xob hluav taws xob tseem tab tom tsim, thiab hauv cov haujlwm 15CrMoG tseem yog cov khoom siv tseem ceeb rau qhov nruab nrab - qhov kub thiab txias ntawm txoj hauv kev.
Nyob rau tib lub sijhawm, qhov kub tshaj plaws ntawm cov nroj tsuag siab tshaj plaws tau nce los ntawm kev nkag siab - lub zog txhim kho 9 feem pua ntawm cov qib chromium, thiab qhov kev hloov pauv no hloov cov khoom sib xyaw hauv lub boiler tshiab yam tsis tau hloov 15CrMoG tag nrho. Tus tsav tsheb tseem ceeb sib npaug yog kev saib xyuas thiab kev ua lag luam rov qab. Cov nroj tsuag uas twb muaj lawm yuav tsum tau hloov lub superheater thiab reheater tubing thaum lub sij hawm tawg, thiab cov khoom siv hloov pauv yuav tsum ua raws li tus qauv tsim, yog li kev thov tau txhawb nqa los ntawm lub hauv paus txawm tias thaum tsim kho tshiab qeeb. Lub nkoj siab thiab cov haujlwm petrochemical ntxiv qhov yuav tsum tau ua kom ruaj khov ntxiv rau qib hauv cov khoom siv hluav taws xob sib hloov, hloov kho qhov cub thiab cov txheej txheem piping.
Kev xaiv thiab Fabrication Notes
Thaum qhia txog qib, txhim kho tus qauv, txoj kev tsim khoom, sab nraud txoj kab uas hla thiab phab ntsa thickness, lub hauv paus ntev thiab kev soj ntsuam yuav tsum tau ua nyob rau theem kev txiav txim. Kev pabcuam siab hu rau seamless yeeb nkab, muab nrog daim ntawv pov thawj zeb kuaj thiab, qhov xav tau, kev kuaj ultrasonic ntawm lub cev. Vuam yuav tsum muaj cov txheej txheem tsim nyog nrog preheat ntawm li 150 mus rau 250 degrees Celsius rau cov seem tuab thiab tom qab-weld cua sov kho ntawm qhov chaw siab, siv cov khoom siv sib xyaw ua ke rau chromium- molybdenum muaj pes tsawg leeg. Fabricators yuav tsum ua kom qhov sib koom ua ke kom qhuav, tsis txhob muaj cov kab mob tooj liab thiab sau cov cua sov ntawm txhua qhov ntev kom cov khoom tiav tuaj yeem rov qab mus rau daim ntawv pov thawj zeb.
FAQ
Q: Dab tsi kev lag luam siv 15CrMoG yeeb nkab?
Kev tsim hluav taws xob yog cov neeg siv loj tshaj plaws, ua raws li kev ua lag luam petrochemical thiab tshuaj lom neeg, thiab kev lag luam dav dav nyob qhov twg cov roj kub kub lossis cov kua dej raug tswj xyuas hauv qab siab.
Q: Qhov siab tshaj plaws ua haujlwm kub yog dab tsi?
Txog 550 degrees Celsius hauv kev tsim qauv ib txwm muaj, nrog qee cov ntawv thov txuas mus rau 580 degrees Celsius qhov twg qhov kev ntxhov siab tso cai.
Q: 15CrMoG piv nrog cov qib siab dua - alloy li cas?
Nws tsis tshua muaj zog ntawm qhov kub siab tshaj plaws tab sis raug nqi tsawg dua thiab yooj yim dua rau vuam thiab tsim, uas ua rau nws xaiv kev lag luam rau nruab nrab - kub lub luag haujlwm.
Q: Puas yog qib haum rau kev pabcuam hydrogen?
Yog lawm. Nws cov ntsiab lus chromium thiab molybdenum muab cov txiaj ntsig zoo rau hydrogen nres, uas yog vim li cas nws tshwm sim hauv hydrotreating thiab hloov kho cov cuab yeej.
Q: Dab tsi yog qhov kev xa khoom xa tuaj?
Normalized thiab tempered, uas yog tus mob nyob rau hauv uas qib ua tiav nws tsim creep zog.
Q: Cov qib puas yuav hloov los ntawm cov hlau tshiab?
Tsis yog kiag li. Cov qib siab dhau los ua qhov kub tshaj plaws ntawm cov tshiab siab - boilers efficiency, thaum hloov tubing thiab nruab nrab - kub lub luag hauj lwm tseem mus haus 15CrMoG nyob rau hauv loj ntim.
