Lub ntsiab
ASTM A335 P92 yog qhov tshwj xeeb rauSeamless Ferritic Alloy - Cov Yeeb Nkabnpaj rau high - kev pab kub. Daim ntawv "P92" yog hais txog qib tshwj xeeb ntawm cov hlau paub rau nws tshwj xeebCrep Lub Zogthiaboxidation tsis kamntawm kev nce siab kub.
Cov ntaub ntawv no yog qhov tseem ceeb ntawm niaj hnub, siab {- effecticic fais fab nroj tsuag thiab lwm yam tseem ceeb siab- kev siv kub.
Cov yam ntxwv tseem ceeb & Cov txiaj ntsig zoo
Siab - kub lub zog:P92 yog ib feem ntawm chav kawm ntawm cov hlau uas hu ua "nkag {1} {}} ua rau} kev txhim kho ferritic" (CSEF). Nws thawj qhov txiaj ntsig yog nws lub peev xwm tiv thaiv cov kev ntxhov siab ntawm cov neeg txhua yam ntawm qhov kub ntawm 580℃rau 650℃(1076℃f rau 1202℃F).
Zoo heev creep:Creep yog qhov qeeb, deformation kev deformation ntawm cov ntaub ntawv nyob rau hauv kev ntxhov siab tas li thaum kub. P92 Cov Tshuaj Muaj Tshuaj Muaj Zog yog tsim kom ntau tshaj plaws creep tsis kam, tso cai rau tus tsim ntawm thicker {} walled {} {4 4}} beast qib pipes.
Zoo oxidation & corrosion tsis kam:Nws tsim cov txheej txheem tiv thaiv khov kho oxide txheej, tawm tsam hauv chav ib puag ncig.
Thermal rog tsis kam:Nws ua tau zoo nyob rau hauv cyclic cua sov thiab cua txias, uas yog ib txwm muaj nyob rau hauv cov chaw cog ntoo fais fab.
Weldability:Thaum nws xav tau qhia tshwj xeeb thiab ua tib zoo vuam cov txheej txheem (Pre6 {{{} {} weld kev kho cua sov yog qhov yuav tsum tau ua), nws yuav tsum tau hais txog weldable nrog cov txuj ci tsim nyog.
Tshuaj Muaj Tshuaj
Cov tshuaj lom neeg muaj kuab lom (hauv qhov hnyav feem pua) yog tswj nruj me ntsis kom ua tiav cov khoom xav tau. Cov ntsiab lus tseem ceeb suav nrog:
| Lub ntsiab | Muaj pes tsawg leeg (%) | Lub hom phiaj |
|---|---|---|
| Carbon (c) | 0.07 - 0.13 | Lub zog, hardness |
| Manganese (mn) | 0.30 - 0.60 | Lub zog, deoxidation |
| Phosphorus (p) | 0.020 max | Impurity (tswj) |
| Sulphur (s) | 0.010 max | Impurity (tswj) |
| Silicon (si) | 0.50 max | Deoxidation, lub zog |
| Chromium (cr) | 8.50 - 9.50 | Oxidation & Corrosion Kuj |
| Molybdenum (mo) | 0.30 - 0.60 | Lub zog, creep Kuj |
| Vanadium (V) | 0.15 - 0.25 | Creep Zog (precipitate tawv tawv) |
| Niobium (nb) | 0.04 - 0.09 | Lis cov ua kom zoo, lub zog |
| Nitrogen (n) | 0.030 - 0.070 | Lub zog (nrog V thiab NB) |
| Npib tsib caug (ni) | 0.40 max | Kev muaj zog |
| Aluminium (AL) | 0.02 max | Deoxidation |
| Boron (b) | 0.001 - 0.006 | Qhov tseem ceeb rau lub zog tsis muaj zog |
| Tungsten (w) | 1.50 - 2.00 | Qhov tseem ceeb rau cov teeb meem daws teeb meem |
Nco tseg:Qhov sib ntxiv ntawmTungsten (w)thiabBoron (b)Yog dab tsi txawv P92 los ntawm cov qhab nia ua ntej nyiam P91, muab nws zoo tshaj- kub ua tau zoo.
Cov Khoom Siv Neeg Kho Tshuab
Cov yeeb nkab yuav tsum ua kom tau raws li cov khoom ntiag tug hauv qab no tom qab kev kho mob kub (li qub thiab tempering):
| Ntiag tug | Qhov toob kas |
|---|---|
| Lub zog tensile | Ntau dua los yog sib npaug rau 620 mpa (90 ksi) |
| Paib lub zog | Ntau dua los yog sib npaug rau 440 mpa (64 ksi) |
| Elongation | Ntau dua los yog sib npaug rau 20% (sib txawv nrog phab ntsa tuab) |
Cov txheej txheem tsim khoom
Seamless Tho:Cov yeeb nkab yog tsim los ua seamless, feem ntau yog siv ib txoj kev zoo li Manesmann cov txheej txheem, qhov twg cov bilcet yog chob los tsim lub plhaub khoob. Qhov no tshem tawm qhov kev sib tw weld ntev ntev, uas yog lub peev xwm tsis muaj zog nyob rau hauv siab siab thiab kub.
Kev Kho Cua Sov:P92 Yeebyuav tsumyauv ua ib qho txheej txheem kho cua sov:
Normalizing:Rhaub kom kwv yees li 1040℃- 1080℃(1900℃f - 1975℃f) ua raws li los ntawm txias hauv huab cua. Qhov no tsim cov khaub ncaws hnav, zoo - nplej microstructure.
Tempering:Rov ua kom sov rau qhov kub ntawm 730℃- 780℃(1350℃f {{3℃f) thiab tuav, ces txias. Qhov no relieves kev ntxhov siab sab hauv thiab txhim kho kev nruj.
Cov Kev Siv Cov Ntawv Siv
ASTM A335 P92 yog siv nyob rau hauv qhov siab tseem ceeb - kub thiab siab {{} HOUNT Seem ntawm:
Supercritical thiab ultra -} supercritical fais fab nroj tsuag:Cov kab chav dej tseem ceeb, cov kab kub, thiab headers.
Petrochemical Kev Lag Luam:High - kub r} sov kav hauv cov khoom ua kom huv.
Kev sib hloov cua sov thiab lub rhaub dej kub.
Kev sib piv nrog lwm qib
Vs. P91:P92 muaj kwv yees li 20-30% ntau dua kev ntxhov siab dua P91 ntawm qhov kub ntawm qhov kub siab tshaj 600 degree. Qhov no tso cai rau cov khoom tseem ceeb thiab cov nyiaj poob qis hauv cov qauv cog.
Vs. P22 (2.25Cro):P92 yog qhov tseem ceeb nyob rau hauv lub zog thiab lub peev xwm kub, ua kom muaj ntau dua cog kev ua kom zoo.
Cov kev txiav txim tseem ceeb rau kev siv
Vuam:Vuam P92 yuav tsum ua nruj ua nruj kev tsim nyog. Cov kauj ruam tseem ceeb suav nrog:
Pre6 - cua sov rau ib ncig 200℃- 250 degree.
Siv txuam los yog tshaj - eg, eroyed ua cov tub lim hlau (piv txwv li} b9 rau tig, E9015-B9 rau SMAW).
Yuav tsum tau tshaj tawm - Weld Kev Kho Tshav Kub (PWHT)Ntawm 730 Degree - 760℃kom ua tiav qhov tsim nyog tempered martensite hauv tshav kub- kev cuam tshuam cheeb tsam (Haz).
Ceeb toom:Kev yuav khoom yuav tsum muaj cov ntawv pov thawj nruj, suav nrogCov Ntawv Pov Thawj Ua Lag Luam (MTC)Ntawd soj ntsuam cov tshuaj muaj pes tsawg leeg, cov khoom siv neeg kho mob, thiab cov ntaub ntawv kho cua sov.
Hauv cov ntsiab lus xaus,ASTM A335 P92 yog tus nqi tshaj tawm- qib kev siv yeeb nkab enjective thiab txo cov pa hluav taws xob thiab txo cov pa hluav taws xob ntawm niaj hnub no thermal lub zog.
