Txheej txheem cej luam
15m3 yogqis- alloy carbon steeltsim tshwj xeeb rau kev ua haujlwm siab - kub. Lub "Mo" hauv nws lub npe sawv cev rau Molybdenum, uas yog qhov tseem ceeb alloying lub ntsiab lus uas ua rau nws lub zog thiab kev tiv thaiv kom nkag mus (qeeb deformation nyob rau hauv qhov kev ntxhov siab tas li) ntawm qhov kub thiab txias piv rau cov pa roj carbon monoxide.
Nws yog cov khoom siv European txheem, dav siv hauv kev tsim cov hlab ntsha siab, boilers, thiab superheaters.
Cov yam ntxwv tseem ceeb & Khoom
Zoo Siab -Tsub Muaj Zog:Lub ntsiab kom zoo dua ntawm 15Mo3 yog nws lub peev xwm los tswj cov neeg kho tshuab lub zog ntawm qhov kub thiab txias qhov twg cov hlau yuav pib tsis muaj zog (feem ntau siab dua 400℃/ 750℃F).
Txhim kho Creep Resistance:Molybdenum txhim khu cov hlau tsis kam mus rau creep, ua rau nws haum rau ntev - raug rau kev ntxhov siab thiab kub.
Zoo Weldability:Nws muaj qhov zoo weldability, txawm hais tias nws yuav tsum tau ua ntej- cua sov thiab tom qab-weld heat treatment (PWHT) rau cov seem tuab los tiv thaiv kev tsim ntawm cov tawv tawv, nkig microstructures (xws li martensite) hauv tshav kub- thaj chaw cuam tshuam (HAZ).
Resistance rau Hydrogen Attack:Ntawm qhov kub thiab txias siab, hydrogen tuaj yeem sib kis mus rau hauv cov hlau thiab ua rau decarburization thiab tawg . 15Mo3 muaj kev tiv thaiv zoo dua rau qhov tshwm sim no dua li carbon steel.
Chemical Composition (Tshwj xeeb raws li EN 10216-2)
Cov muaj pes tsawg leeg yog tswj nruj kom ntseeg tau tias kev ua haujlwm zoo ib yam.
| Lub ntsiab | Cov ntsiab lus (%) |
|---|---|
| Cov pa roj carbon (C) | 0.12 - 0.20 |
| Silicon (Si) | Tsawg dua lossis sib npaug li 0.35 |
| Manganese (Mn) | 0.40 - 1.00 |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.025 |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.010 |
| Molybdenum (hli) | 0.25 - 0.35 |
| Chromium (Cr) | ~ 0.30 (yeem, tab sis feem ntau tam sim no) |
Mechanical Properties (raws li EN 10216-2)
Cov no yog yam tsawg kawg nkaus uas yuav tsum tau muaj rau cov kav dej nyob rau hauv lub normalized xa khoom.
Tensile zog (Rm):440 - 590 MPa
Yield zog (Rp0.2):Ntau tshaj lossis sib npaug li 280 MPa
Elongation (A):Ntau dua lossis sib npaug li 25% (ntawm ib daim ntawv xeem)
Qhov kub thiab txias
Qhov Kev Pab Cuam Siab Tshaj:Feem ntau mus txog525℃- 550℃(977℃F - 1022℃F). Rau qhov kub tshaj qhov no, cov hlau uas muaj chromium thiab molybdenum ntau dua (xws li 13CrMo4-5 lossis 10CrMo9-10) yog siv.
Qhov Kev Pab Cuam Tsawg:Nws tseem haum rau qhov kub thiab txias mus txog kwv yees li-10 ° F (14 ° F). Rau qhov ntsuas kub qis, yuav tsum tau kuaj xyuas kom muaj zog.
Qib sib npaug
15Mo3 yog European (DIN / EN) qib. Nov yog nws qhov sib npaug thoob ntiaj teb:
| Txuj | Qib sib npaug |
|---|---|
| EN | 15 Mo3 (1.5415) |
| DIN | 15 hmo 3 |
| ASTM / ASME | A335 P1, A209 T1 |
| UNS | K11522 |
| JIS | SIB 12 |
| GB (Tuam Tshoj) | 15 MOG |
Nco tseg:Thaum cov no yog qhov sib npaug, tuaj yeem muaj kev hloov pauv me ntsis hauv cov tshuaj muaj pes tsawg leeg thiab cov khoom siv kho tshuab. Nco ntsoov sab laj cov txheej txheem tshwj xeeb rau koj qhov project.
Cov ntawv thov tseem ceeb
15Mo3 boiler kav yog siv nyob rau hauv cov khoom uas ua hauj lwm nyob rau hauv lub siab thiab kub, xws li:
Boiler Superheaters thiab Reheaters:Cov raj uas ua kom sov chav tshaj nws qhov chaw saturation.
Boiler Pressure Pipes:Cov kab tseem ceeb thiab cov headers nyob rau hauv lub boiler system.
Thaum tshav kub kub Exchangers:Rau siab -kev pabcuam kub.
Fais fab Generation Plants:Nyob rau hauv ob qho tib si pa fossil roj thiab biomass nroj tsuag.
Chemical thiab Petrochemical Plants:Rau siab -kub txheej txheem piping.
Fabrication thiab Welding Considerations
Ua ntej- cua sov:Yuav tsum tau welding. Ib txwm ua ntej- kub kub yog150℃- 200℃(300℃F - 390℃F)kom qeeb tus nqi txias thiab tiv thaiv kev tawg.
Tshaj tawm -Weld Heat Treatment (PWHT):Pom zoo, tshwj xeeb tshaj yog rau cov phab ntsa tuab. Ib qho PWHT raug coj los ntawm600℃- 650℃(1110℃F - 1200℃F)txhawm rau txo qis kev ntxhov siab thiab npau taws txhua qhov chaw nyuaj hauv HAZ.
Welding Consumables:Cov hluav taws xob thiab cov xov hlau uas muaj qhov sib xws (xws li EN ISO 16834: E Mo B) yuav tsum tau siv.
Cov qauv tsim nyog
Cov kav dej ua los ntawm 15Mo3 yog tswj hwm los ntawm ntau tus qauv European:
TS EN 10216-2:Seamless steel raj rau lub hom phiaj siab - Kev xa khoom cov xwm txheej - Ntu 2: Tsis yog- alloy thiab alloy steel hlab nrog cov khoom ntsuas kub siab.
TS EN 10217-2:Welded steel tubes rau lub hom phiaj siab - Kev xa khoom cov xwm txheej - Ntu 2: Hluav taws xob welded uas tsis yog- alloy thiab alloy steel tubes nrog qhov ntsuas kub siab.
Cov ntsiab lus
Hauv essence,15Mo3 yog cov neeg ua haujlwm qis- hlau alloy rau siab- kub boiler thiab kev siv siab.Nws muab qhov sib npaug zoo ntawm siab -kub lub zog, nkag siab, thiab fabricability ntawm tus nqi uas yog qis dua li cov alloyed chromium ntau ntau-molybdenum steels. Thaum koj xav tau kev ua tau zoo tshaj cov pa roj carbon steel tab sis tsis xav tau cov khoom siab tshaj ntawm siab -chrome alloys, 15Mo3 feem ntau yog qhov kev xaiv zoo tshaj plaws.
