Khoom Txheej txheem cej luam
ASTM A335 Qib P5 yog Ferritic Chromium-Molybdenum Alloy Steel Yeeb Nkab npaj rau nce {} {{pooke kev pab cuam. Nrog chromium nyob rau hauv 4-6% ntau thiab molybdenum nyob ib ncig ntawm 0.45-0.65%, p5 muab cov txiaj ntsig zoo, thiab lub zog ua kom muaj zog, thiab weldability. Qhov no ua rau nws xaiv cov kev xaiv rau cov boiler thiab chav dej, cov txheej txheem kub thiab cov roj kub uas siv hluav taws xob nrawm nrawm nrawm lossis poob lub zog. Thaum xa tawm hauv qhov qub thiab tempered mob, p5 tswj xyuas seem ruaj khov thiab tshuab kev ntseeg tau dhau lub sijhawm ua haujlwm ntev.
Kev siv tshuaj lom neeg (raug,%)
| Lub ntsiab | Cov ntsiab lus (%) | Rooj mov |
|---|---|---|
| Carbon (c) | Tsawg dua los yog sib npaug rau 0.15 | Muab lub zog, khaws cia qis rau weldability |
| Manganese (mn) | 0.30–0.60 | Deagidation, txhim kho cov haujlwm kub |
| Silicon (si) | 0.50–1.00 | Txhawbxidation Kuj |
| Chromium (cr) | 4.00–6.00 | Siab - kub ntsuas thiab corrosion tsis kam |
| Molybdenum (mo) | 0.45–0.65 | Creep thiab tawg lub zog |
| Phosphorus (p) | Tsawg dua los yog sib npaug rau 0.025 | Tswj hwm kev nruj |
| Sulphur (s) | Tsawg dua los yog sib npaug rau 0.025 | Balanced Machinity / Toughning |
| Npib tsib caug (ni) | Tsawg dua los yog sib npaug rau 0.50 | Ntxiv kev nruj me ntsis hauv qee cov xov xwm |
| Tooj Liab (Cu) | Tsawg dua los yog sib npaug rau 0.40 | Kev tiv thaiv oxidation ntxiv |
| V, nb | Tsawg dua los yog sib npaug rau 0.02 txhua | Lis cov ua kom zoo, nkag mus ruaj khov |
Qhov kev sib npaug ntawm no yog qis dua P22 / P91, yog li nws yooj yim dua rau weld thiab pWtht, tab sis tseem muab cov oxidation oxidation zoo dua li qis- bu} Cur qeb.
Cov Khoom Siv Neeg Kho Tshuab
| Ntiag tug | Qhov toob kas | Lub hom phiaj |
|---|---|---|
| Lub zog tensile | Ntau dua los yog sib npaug rau 415 MPa (60 ksi) | Tsis kam ua pob txha lov hauv qab thauj khoom |
| Paib lub zog | Ntau dua los yog sib npaug rau 205 MPa (30 ksi) | Tsis kam ua tiav kev ruaj khov |
| Elongation | Ntau dua los yog sib npaug rau 30% | Tso cai rau kev sib sau thiab kev sib txuas |
| Kev nyuaj | Tsawg dua los yog sib npaug rau 163 hbw | Pheej nruj thiab weld sib xyaw |
Cov txiaj ntsig zoo sib xws rau qhov qub li -}} - temper temper yuav tsum tau los ntawm ATM A335.
Kev tsim khoom thiab kev kho cua sov
P5 yuav tsum tau tsim tawm thiab kub {-}}}}}}}} - sij hawm ua haujlwm ntawm qhov kub thiab txias. Octal Yeeb Nkab Siv txoj kev sib cav sib ceg pib los ntawm kev ua kom huv huv {{4} mo billets. Billets yog rhuab thiab chob los ntawm cov hollows, tom qab ntawd kub- kev tawm los yog txias} Tom qab kev sib sau, kav dej yog ib txwm muaj nyob rau ntawm 900-950℃los txhim kho cov ferritic matrix, tshem tawm tsis} cov khaub ncaws hnav zoo nkauj thiab tshem cov kev ntxhov siab thiab tshem tawm kev ntxhov siab. Ib kauj ruam dhau los ntawm txog 675-750℃Restores ductores detility thiab kho ib qho ruaj khov ferrite-carbide qauv ferrite-carbide. Qhov no ob - theem lub voj voog Thermal yog dab tsi muab p5 nws cov neeg nkag mus tsis tau thiab oxidation ruaj khov hauv kev pabcuam.
Tom qab kev kho cua sov, txhua tus yeeb nkab tau raug kuaj hydrostatic thiab tsis yog} {}} kev puas tsuaj tam sim no raws li tau txiav txim). Cov kav dej tau muab tso rau hauv qhov qub thiab tempered mob nrog tag nrho cov cua sov traceazeobility (en {}}}}}, uas yog qhov tseem ceeb rau lub zog thiab cov phiaj xwm hluav taws xob.
Qhov ntau yam
| Chaw ua uas tsis tau haus | Ntau / cov ntsiab lus |
|---|---|
| Sab nraud ntawm lub taub | 12.7-610 hli (½-24 hauv) |
| Phab Ntsa Thickness | 1.2-100 hli, incl. SCH 10-SCH 160 |
| Qho ntev | Txog li 12 m (srl / drl / txiav - rau {{2} ntev) |
| Kawg Hom | Beveled rau Vuam lossis Plain Kawg |
| Of thev | Feem ntau ± 1% (ib astm A999 lossis kev pom zoo) |
| Wht kam rau | Feem ntau ± 10% |
| Ncaj | Feem ntau tsawg dua li lossis sib npaug rau 0.8 hli ib m |
Qhov no ntau npog ob nruab nrab -} bore chav dej chav thiab cov txheej txheem tshuaj ntsuab.
Siab - kub kev ua tau zoo
Ntawm kev pabcuam kub txog li 565℃(p5 ua tiav cov chromium rici rich est oxide uas tau qeeb me ntsis thiab hlau poob. Vim tias Molybdenum ntxiv dag zog rau Ferriticic matrix, kev nkag dag zog ua tiav cov nyhuv maj mam qeeb dua cov pa roj carbon hlau. Lub ntsuas hluav taws xob ntsuas tau kuj pab tiv thaiv kev tawm tsam cua sov thiab cov cua sov hloov chaw thiab cov phab ntsa thickness nyob twj ywm tshaj kev tshuaj xyuas kev ntsuas. Rau cov ntawv thov xav tau kev ntxhov siab ntau dua lossis kev ntxhov siab ntau dua, tab sis rau oxidation {{10} {{{} {} {} {} {} {}} kev xaiv tau zoo.
Cov Ntawv Thov
Fais fab thiab boiler tshuab: chav kab, boiler heterers, superheater thiab rethere coils hauv nruab nrab kub band
Refining thiab Petrochemical Cov Lus Qhia: Rauv thiab Hloov Hluav Taws Xob Cov Khoom Siv Hluav Taws Xob, Cov Kab Hloov Kub Kub, Flare thiab Txhim Kho Headers
Tshuaj lom neeg thiab cov nroj tsuag chiv: high- kev hloov pauv kub, reactor thiab cov txheej txheem manifolds
Roj thiab roj txheej txheem chaw: Chav txhaj tshuaj thiab cov txheej txheem kub kab uas cr - mo yeeb nkab yog teev
Kev sib piv nrog cov cr - mo qeb
| Teem nqi | CR (%) | Mo (%) | Cov kev pabcuam raug zoo li cas |
|---|---|---|---|
| P5 | 4.0–6.0 | 0.45–0.65 | Zoo dua oxidation tsis kam ntawm nruab nrab - qhov kub siab, zoo weldability |
| P11 | ~1–1.5 | ~0.5 | Chav nyob ruaj khov / boiler piping qhov twg muaj zog thiab ductility yuav tsum tau sib npaug |
| P22 | ~2–2.5 | ~1 | Hotter SuperHeater / Kev Kawm Rov Ua Khaub Ncaws Menyuam Xav Tau Ntau Cov Khaub Ncaws / Rupture Kuj |
Qhov no yuav pab qhia txoj haujlwm engineers xaiv qhov tseeb alloy thaum ob peb qib A335 raug tso cai.
Soj ntsuam thiab kuaj
Cov yeeb nkab octal nqa tawm cov tshuaj ntsuam raws li Astm A335 thiab AVETM A999. Qhov no suav nrog hydrostatic kuaj, NDT ntawm cov yeeb nkab lub cev thiab xaus, tensile thiab hardness txheeb xyuas, thiab flaring / flaring kev kuaj kom paub meej tias dhuav. Kev Cuam Tshuam lossis Kev Ntsuas Hluav Taws Xob lossis Kev Ntsuas Hluav Taws Xob tuaj yeem raug ntxiv thaum cov phiaj xwm kev cai hu rau chav kuaj xyuas ntau dua. Txhua qhov kev sim ua tau yog piav qhia txog cov ntawv pov thawj ntawm zeb thiab cov kav dej tau cim rau kev txheeb xyuas tiav.
Vim li cas octal yeeb nkab
Cov khoom siv txoj kev AFTM / ASME A335 P5 Seamless Yeeb Nkab nyob rau hauv ib txwm thiab tempered mob
Tas nrho cov khoom siv, tshuab thiab NDT cov ntaub ntawv tsim nyog rau lub zog, chaw ua haujlwm thiab tshuaj lom neeg
Export -}} Npaj Cov Khoom Siv, Xaus Kev Tiv Thaiv thiab Npav
Muaj peev xwm muab cov qib uas nyob ze (P11, P22) rau raj xa dej thiab boiler system nrog ntau qhov kub thiab txias
Cov ntsiab lus thiab cov ntaub ntawv tshwj xeeb sau nyob rau hauv ib qho khoom - ua ntej, kev coj ua txuj ci haum rau lub web tshaj tawm thiab tshawb nrhiav
