1. Core Identity: ASTM A335 Qib P91
Thaum koj pom "K51545 Seamless Steel Pipe," nws yuav luag ib txwm hais txog cov yeeb nkab uas ua raws liASTM A335 / A335M - Txuj Specification rau Seamless Ferritic Alloy-Steel Pipe rau High- Kev Pabcuam Kub, tshwj xeebQib P91.
Seamless:Cov yeeb nkab yog tsim los tsis muaj welded seam, ua rau nws muaj zog thiab txhim khu kev qha rau siab - kev siv siab.
Ferritic Alloy-Steel:Qhov no yog hais txog microstructure ntawm cov hlau. P91 yog martensitic steel (ib hom ferritic qauv ua tiav los ntawm kev kho cua sov), paub txog nws lub zog thiab nkag siab tsis kam.
High -Tsev Kev Pabcuam:Qhov no yog lub hom phiaj tseem ceeb ntawm P91 yeeb nkab.
2. Tshuaj muaj pes tsawg leeg
Cov npe "P91" thiab "K51545" yuav tsum muaj cov tshuaj lom neeg tshwj xeeb kom ua tiav nws cov khoom. Cov ntsiab lus tseem ceeb muaj xws li:
| Lub ntsiab | Kev sib xyaw (%) | Lub hom phiaj |
|---|---|---|
| Cov pa roj carbon (C) | 0.08 - 0.12 | Muab lub zog |
| Chromium (Cr) | 8.00 - 9.50 | Muab oxidation thiab corrosion kuj ntawm qhov kub thiab txias |
| Molybdenum (hli) | 0.85 - 1.05 | Nce zog thiab creep kuj |
| Vanadium (V) | 0.18 - 0.25 | Txhim kho lub zog thiab stabilizes microstructure |
| Niobium (Nb) | 0.06 - 0.10 | Refines grain qauv thiab txhim kho toughness thiab lub zog |
| Nickel (Ni) | Tsawg dua los yog sib npaug li 0.40 | Txhim kho toughness |
| Nitrogen (N) | 0.03 - 0.07 | Ua haujlwm nrog Vanadium los tsim kom muaj zog precipitates |
| Silicon (Si) | 0.20 - 0.50 | Deoxidizer thaum lub sij hawm steelmaking |
| Manganese (Mn) | 0.30 - 0.60 | Ua kom muaj zog thiab hardenability |
3. Cov cuab yeej cuab tam tseem ceeb
Cov yeeb nkab yuav tsum ua tau raws li cov khoom siv tshwj xeeb tom qab kev kho cua sov (normalizing thiab tempering).
Tensile zog:Ntau dua lossis sib npaug rau 585 MPa (85,000 psi)
Yield zog:Ntau dua lossis sib npaug rau 415 MPa (60,000 psi)
Elongation:Ntau dua los yog sib npaug li 20% (qhia tau tias zoo ductility)
4. Cov ntawv thov tseem ceeb
K51545 (P91) yeeb nkab yog siv rau hauv qhov tseem ceeb, siab - ib puag ncig kev ntxhov siab, feem ntau hauv:
Kev tsim hluav taws xob:Siab -Cov kab hluav taws xob siab hauv cov chaw tsim hluav taws xob fossil (ob lub ntsiab chav thiab cov kab kub reheat). Nws tso cai rau kev khiav hauj lwm kub thiab siab, ua rau cov nroj tsuag ntau dua.
Petrochemical Kev Lag Luam:Hauv refineries thiab tshuaj nroj tsuag rau cov kav dej uas ua haujlwm siab -kub kua thiab roj.
Thaum tshav kub kub ua haujlwm:Rau siab -kub qhov cub Cheebtsam thiab cov khoom siv hluav taws xob.
5. Qhov zoo ntawm kev siv K51545 / P91 yeeb nkab
High Creep zog:Nws tuaj yeem tiv taus txhua yam kev ntxhov siab ntawm qhov kub siab heev (txog ~ 600℃/ 1112℃F) ntev ntev yam tsis muaj deforming. Qhov no yog nws qhov txiaj ntsig tseem ceeb tshaj plaws.
Zoo heev Oxidation Resistance:Cov ntsiab lus siab Chromium tsim cov txheej txheem tiv thaiv uas tiv thaiv qhov ntsuas (oxidation) ntawm qhov kub thiab txias.
Zoo Thermal Fatigue Resistance:Muaj peev xwm tiv taus lub voj voog ntawm cua sov thiab txias yam tsis muaj kev tawg.
Siab zog ntawm qhov kub siab:Tso cai rau kev tsim cov phab ntsa ntawm cov yeeb nkab thinner piv rau qis dua -qib alloys (xws li P22), txo qhov hnyav thiab cov khoom siv.
6. Kev txiav txim siab tseem ceeb thiab kev nyuaj
Vuam:P91 tsis yog qhov nyuaj rau vuam ntau dua li cov hlau. Nws xav tau:
nruj me ntsis ua ntej - cov txheej txheem cua sov.
Cov hlau tshwj xeeb muab tub lim (xws li ER90S-B9 rau TIG, E9015-B9 rau stick).
Precise tswj ntawm interpass kub.
Ib qho yuav tsum tau ua tom qab Weld Heat Treatment (PWHT) los kho qhov tseeb microstructure thiab toughness nyob rau hauv weld cheeb tsam. Kev vuam tsis zoo tuaj yeem ua rau tsis ua tiav ntxov.
Tus nqi:Nws yog kim kim dua carbon steels (xws li A106 B) vim nws cov ntsiab lus alloy complex thiab txheej txheem tsim.
Cov lus piav qhia
| Feature | Nqe lus piav qhia rau K51545 Seamless Steel Yeeb Nkab |
|---|---|
| Lub Npe | ASTM A335 P91 Yeeb Nkab |
| Hom | Seamless, Ferritic Alloy-Steel |
| Cov yam ntxwv tseem ceeb | High creep zog rau siab kub kev pab cuam |
| Kev siv thawj zaug | Fais fab nroj tsuag chav kab, Petrochemical piping |
| Qhov kub thiab txias | Mus txog ~ 600℃(1112℃F) |
| Main Alloys | Chromium (9%), Molybdenum (1%), Vanadium, Niobium |
| Qhov Loj tshaj plaws | Complex vuam thiab kev kho cua sov yuav tsum |
Hauv kev xaus, thaum tus neeg muag khoom lossis ib qhov haujlwm qhia txog "K51545 Seamless Steel Pipe," lawv thov kom muaj siab -kev ua tau zoo alloy steel yeeb nkab (ASTM A335 P91) tsim los rau qhov tseem ceeb, siab - kub, thiab siab - kev siv siab, feem ntau hauv kev lag luam tsim hluav taws xob.Yuav tsum xyuas kom meej tias cov khoom tau muab nrog cov ntawv pov thawj tsim nyog (cov ntawv pov thawj zeb xeem) kom paub tseeb tias nws ua raws li ASTM A335 tus qauv.
