Txheej txheem cej luam: Dab tsi yog Sa-213 T92?
Sa-213 T92 yog qhov tshwj xeeb rauSeamless Ferritic thiab Austenitic Steel Boiler, Superheater, thiab cua sov - Txiaj Ntsig TubesHauv qab Asme (Asmeskas haiv neeg ntawm cov neeg kho tshuab engineers) code. Tus "T92" qhia txog qib tshwj xeeb nrog kev siv tshuaj lom neeg sib xyaw ntawm cov chungsten, vanadium, thiab feem ntau tsis muaj txiaj ntsig, feem ntau tswj hwm boron.
Nws yog tus tswv cuab ntawm cov neeg ua haujlwm siab tshaj "ntawm cov neeg ntaus pob thiab yog ib tus neeg kawm qib T91, muab cov zog hloov kho kom kub ntawm lub qhov kub.
Cov yam ntxwv tseem ceeb & Cov txiaj ntsig zoo
Tshwj tsis txaus siab lub zog:Qhov no yog thawj qhov txiaj ntsig ntawm T92. Nws tuaj yeem tiv thaiv ntau qhov kev ntxhov siab (zoo li lub siab sab hauv) thaum muaj qib siab heev (feem ntau 580℃f) rau ncua sij hawm tsis muaj deforming los yog swb. Qhov no tso cai rau tus qauv ntawm thinner -}}} pa lub raj, txhim kho kev hloov kho tshav kub thiab txo qhov hnyav.
High - kub oxidation tiv:Nrog cov ntsiab lus chromium ntawm txog li 9%, T92 ua cov txheej txheem ruaj khov, uas tiv thaiv cov ntsuas hluav taws xob thiab xeb hauv chav dej thiab cov pa roj flue.
Zoo thermal conductivity:Piv nrog usteneric stainless hlau (zoo li 304h lossis 34HH lossis 347h lossis 34HH
Qis dua thermal nthuav dav:Nws cov coeffal expansion yog qis dua li ntawm cov hlau Ausenitic steels, uas txo cov thermal kev ntxhov siab thaum pib, thiab thauj khoom hloov pauv.
Tshuaj lom neeg tshuaj lom neeg (ib txwm% los ntawm qhov hnyav, ib asmea--213)
| Lub ntsiab | Muaj pes tsawg leeg (%) | Lub hom phiaj |
|---|---|---|
| Carbon (c) | 0.07 - 0.13 | Lub zog, carbide tsim |
| Manganese (mn) | 0.30 - 0.60 | Lub zog, deoxidizer |
| Phosphorus (p) | 0.020 max | Impurity (tswj) |
| Sulphur (s) | 0.010 max | Impurity (tswj) |
| Silicon (si) | 0.50 max | Deoxidizer |
| Chromium (cr) | 8.50 - 9.50 | Oxidation & Corrosion Kuj |
| Molybdenum (mo) | 0.30 - 0.60 | Cov tshuaj muaj zog ntxiv dag zog |
| Vanadium (V) | 0.15 - 0.25 | Carbide Tsim, Lub Zog Ciav |
| Niobium (nb) | 0.04 - 0.09 | Nplua carbide / nitride nag lossis daus |
| Tungsten (w) | 1.50 - 2.00 | Cov tshuaj muaj zog ntxiv dag zog |
| Nitrogen (n) | 0.030 - 0.070 | Kev tsim lub zog nitride rau lub zog |
| Boron (b) | 0.001 - 0.006 | Ntsiab lus tseem ceeb:Txhim kho lub zog nkag los ntawm stidilizing microstructure. |
| Npib tsib caug (ni) | 0.40 max | Austenite stabilizer (tswj) |
| Aluminium (AL) | 0.02 max | Deagidizer (tswj) |
Cov khoom siv neeg kho tshuab (raug, rau ib asme sa-213)
| 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% (ntawm 50 hli gauge ntev) |
| Kev nyuaj | Feem ntau 220-265 hbw |
Cov Kev Siv Cov Ntawv Siv
Sa - T92 yog siv nyob rau hauv qhov tseem ceeb heev - kub seem ntawm cov nroj tsuag niaj hnub no:
Superheater leeg:Cov theem kawg ntawm superheaters qhov twg tov qhov kub siab dua.
Kev Txhuam Qia:Cov seem ntawm kev rov ua haujlwm uas ua haujlwm nyob rau hauv kev kub siab thiab kub.
Water Phab Ntsa Panels:Nyob rau hauv kev kawm ultra - supercritical (USC) boilers, qhov twg cua sov yog huab.
High -} kub hews thiab piping:Thaum piping siv ib qho txawv specification (SA-335 P92), nws yog tib qib ntawm cov hlau.
Nws siv tso cai rau cov nroj tsuag fais fab kom ua lag luam nyob rau ntawm cov roj siab dua thiab ntsuas kub (piv txwv li) thiab 25 mpa +), ua rautseem ceeb dua thermal efficiency(feem ntau tshaj 45%) thiabtxo cov pa hluav taws.
Fabrication thiab vuam txiav txim siab
T92 yog qhov siab - cov hlau alloy uas yuav tsum tau saib xyuas kom zoo thaum lub laj thawj:
Pre - cua sov: Tseem ceebua ntej vuam los tiv thaiv kev tawg. Cov preheat yog 200-250℃(392-482 Qib F).
Post - Weld Kev Kho Tshav Kub (PWHT): Kiag li tseem ceeb.Ib qho kev kho tempering tshwj xeeb (feem ntau 760℃± 1000 Degree F ± 18 Degree F) yuav tsum tau ua tam sim ntawd tom qab vuam rau:
Txo cov kev ntxhov siab.
Tem siab lub zog, brittic martensite tsim nyob rau hauv weld cua sov -} bein cuam tshuam thaj chaw (Haz).
Rov qab lub tswv yim Microstructure thiab kev nruj heev.
Vuam Consumables:Yuav tsum siv sib txuam lossis tshaj {- sib txuam cov tub lim hlau (piv txwv li er90s} b9, E9015-B9).
Kev tsim txias:Tom qab pwht, Cheebtsam yuav tsum txias maj mam txias hauv cov huab cua tseem.
Kev tsis raug vuam lossis kev kho cua sov tuaj yeem ua rau ua tsis tiav.
Kev sib piv nrog lwm qib
| Teem nqi | Cov Nta Tseem Ceeb | Raug Max siv temp * |
|---|---|---|
| Sa-213 T22 (2.25Cro) | Lub zog zoo & Weldability, workhorse alloy. | ~ 540 Qib (1000℃f) |
| Sa - 213 T91 (9Clo-v) | Kev txhim kho loj tshaj T22, lub zog zoo. | ~ 595℃(1100℃f) |
| Sa - 213 T92 (9Cr {}} 0.5mo} 0.5mo {{}} 1.8 HLUB-NB-B) | Zoo tshaj lub zog rau T91, tso cai rau phab ntsa thinner. | ~ 620℃(1150℃f) |
| Sa-213h / TP347H | Austenitic stainless hlau, zoo heev corrosion tsis kam, qis thermal conductivity. | ~ 700℃(1292 Degree F) |
* Nco tseg: kub tshaj plaws yog qhov siab heev rau kev ntxhov siab thiab kev tsim qauv lub neej.
Tag
Sa-213 T92 yog aHwm, siab siab siab -} lub zog steelQhov tseem ceeb rau thawb cov ciaj ciam ntawm kev ua hluav taws xob hauv kev ua haujlwm niaj hnub. Nws zoo tshaj qhov siab - kub kev ua tau rau cov kev paub tshwj xeeb hauv kev ua kom zoo dua qub cov ntawv thov tsis yog siv dav dav.
