Lub ntsiab
ASTM A335 yog tus qauv tshwj xeeb rauSeamless Ferritic Alloy - Cov Yeeb Nkabnpaj rau high - kev pab kub. Cov qauv "P9" yog hais txog cov qib tshwj xeeb hauv cov qauv no, muaj tus cwj pwm los ntawm nwschromium - molybdenummuaj pes tsawg leeg.
Cov kav dej no yog tsim los ua nyob rau hauv cov chaw kub thiab ntsuas kub thiab ntsuas, ua rau lawv cov ntawv tseem ceeb hauv kev siv cov ntawv thov kev lag luam.
Cov yam ntxwv tseem ceeb ntawm A335 P9
| Ntiag tug | Kev piav txog |
|---|---|
| Khoom Hom | Ferritic Alloy Steel |
| Qhov Tseem Ceeb Alloying Ntsiab Lus | Chromium (cr) ~ 8.00%, Molybdenum (mo) ~ 1.00% |
| Kev tsim | MARTENSITIC (tom qab tsim nyog li qub thiab kev kub qhuav cua sov) |
| Cov txheej txheem tsim khoom | Seamless (yuav tsum tau). Qhov no txhais tau tias cov yeeb nkab tsim los ntawm cov khoom ntim khoom uas tsis muaj lub ntsej muag welded, muab lub zog zoo tshaj plaws. |
| Lub Npe | Feem ntau hu ua9-Chromelossis9mo 1moyeeb nkab. |
Tshuaj lom neeg tshuaj (hnyav%)
Cov tshuaj lom neeg muaj tshuaj lom yog tswj hwm los ntawm AVTM A335 tus qauv. Cov hauv qab no yog cov kev xav tau rau P9 qib:
| Lub ntsiab | Muaj pes tsawg leeg (%) |
|---|---|
| Carbon (c) | 0.15 Max |
| Manganese (mn) | 0.30 - 0.60 |
| Phosphorus (p) | 0.025 max |
| Sulphur (s) | 0.025 max |
| Silicon (si) | 0.25 - 1.00 |
| Chromium (cr) | 8.00 - 10.00 |
| Molybdenum (mo) | 0.90 - 1.10 |
Nco tseg: cov yeeb nkab yuav tsum tau kev kho cua sov (li qub thiab tempering) kom ua tiav cov khoom xav tau.
Cov Khoom Siv Neeg Kho Tshuab
Qhov tsawg kawg nkaus uas yuav tsum tau ua cov khoom siv hluav taws xob ntawm chav tsev kub yog:
| Ntiag tug | Qhov toob kas |
|---|---|
| Lub zog tensile | 415 MPa (60,000 psi) min |
| Paib lub zog | 205 MPa (30,000 psi) min |
| Elongation | Sib txawv nrog phab ntsa thickness, tab sis feem ntau tsawg kawg 20% |
Qhov zoo thiab vim li cas xaiv P9?
Zoo heev - kub lub zog:Tswj hwm nws cov kev ntseeg siab thiab kev tawm tsam rau nkag (qeeb deformation nyob rau hauv kev ntxhov siab tas li) ntawm qhov kub me feem ntau ua rau1100℃f (593 degree).
Zoo oxidation tiv:Qhov 9% cov ntsiab lus chromium muab qhov zoo dua zoo dua rau kev ntsuas (oxidation) hauv ib puag ncig thiab cov hlau}} aliet allloy xws li P11 lossis P22.
Sulfidation kuj:Kev tawm tsam los ntawm cov neeg Sulphur cov tebchaw tam sim no nyob rau ntau cov txheej txheem ntws, ua rau nws haum rau kev siv hluav taws xob.
Superior rau cov qib qis:Muab tau zoo dua high - kub kev ua tau zoo li p91 (9%} p91 (9% mo, nb) rau qee qhov kub thiab txias.
Cov Kev Siv Cov Ntawv Siv
ASTM A335 P9 Kav yog siv rau hauv qhov siab tseem ceeb - kub thiab siab}}} siab} cov tshuab siab, suav nrog:
Lub zog tiam:SuperHeater thiab Rabe rabes kab, thiab siab - kub taub hau hauv pob zeb roj teeb hluav taws xob.
Roj av rov qab:Pipelines hauv cov txheej txheem txheej txheem refinery, xws li catalytic cracking thiab hydrocacking units, qhov twg tsis kam rau hydrogen nres kuj tseem ceeb.
Petrochemical Nroj Tsuag:Hloov cov kab rau cov roj kub thiab cov txheej txheem ua kua.
Kev sib hloov cua sov cua sov thiab boilers:Rau siab - kev pab kub.
Kev sib piv nrog lwm cov qib kawm
| Teem nqi | Lub Npe | Raug crity crary | Cov Nta Tseem Ceeb & Sib Piv |
|---|---|---|---|
| A335 P5 | 5cr-0.5mo | ~5% | Zoo siab - kub lub zog, tab sis qis oxidation tsis kam dua p9. |
| A335 P11 | 1.25CR-0.5mo | ~1.25% | Qib ua haujlwm rau kev ntsuas kub. P9 muaj zog thiab ntau oxidation - tsis kam. |
| A335 P22 | 2.25Cro | ~2.25% | Ntau qib. P9 muaj kev ua tau zoo tshaj plaws ntawm qhov kub siab dua. |
| A335 P91 | 9Cl - 1mo - v-nb | ~9% | Ib qho kev hloov pauv nrog Vanadium thiab Niobium. Muajtseem ceeb dua lub zogTshaj li p9 ntawm qhov kub thiab txias, tso cai rau thinner yeeb nkab phab ntsa. P91 muaj ntau superseded p9 rau cov tshiab, siab - kev txhim kho fais fab nroj tsuag. |
| A335 P92 | 9P-2w | ~9% | Txawm muaj zog dua P91 Vim yog Tungsten ntxiv, siv nyob rau hauv ultra - reccritical fais fab nroj tsuag. |
Cov kev txiav txim tseem ceeb rau kev siv
Vuam:P9 xav kom cov txheej txheem vuam, suav nrog preheating thiab tshaj tawm {{} Weld Kev Kho Mob Kub (PWT)
Tsis yog rau tsawg - kub kev pab:Thaum zoo heev rau kev kub siab, nws txoj kev nruj zuj zus ntawm cov kub tsawg. Nws tsis yog feem ntau teev rau sub - xoom / cry cryogenic kev pab.
Cov Qauv Ua Raws Cai:Cov kav dej tau muab tso rau ASTM A335, tab sis tus qauv seem (piv txwv li, txheej doorch, phab ntsa tuab) yog them los ntawmASTM A530(General Spec) lossisASME B36.10M(tshwj xeeb qhov ntev).
Hauv cov ntsiab lus xaus,ASTM A335 P9 yog qhov siab {2} Kev ua haujlwm chromium {}}}} kub}}}}}}} kub}}} kub}}} kub}}} kub}}} kub}}}} kub}}} kub thiab lub zog yog kev txhawj xeeb tseem ceeb.Thaum cov qib tshiab xws li P91 muaj lub zog siab dua, P9 tseem yog ib qho khoom siv tseem ceeb thiab dav siv nyob rau hauv ntau cov nroj tsuag muaj kev muaj sia.
