Zuag qhia tag nrho
20 MOGyog aqis- alloy carbon steeltsim tshwj xeeb rausiab -kev pabcuam kub, feem ntau hauvboiler systems thiab tshav kub exchangers. Qhov "G" qhia tias nws yog qib boiler raj.
Nws muaj lub zog zoo dua li cov pa roj carbon steel (xws li A106 Qib B) ntawm qhov kub siab, ua rau nws tus nqi - kev xaiv zoo rau qee qhov kub thiab txias.
1. Decoding lub npe: "20MoG"
20: Sawv cev rau kwv yees cov ntsiab lus carbon, uas yog0.20%. Qhov no muab qhov sib npaug zoo ntawm lub zog thiab weldability.
Mo: Lub cim tshuaj rauMolybdenum. Qhov no yog qhov tseem ceeb alloying keeb.
G: Sawv rau "Ntsuas"los yog"Boiler Tube". Qhov kev xaiv no yog siv nyob rau hauv cov qauv xws li ASTM A179 thiab A210 kom qhia meej seamless txias-kho cov hlab rau cov cua kub exchangers thiab boilers.
Yog li, 20MoG yog cov hlau uas muaj li 0.20% Carbon thiab ntxiv Molybdenum.
2. Cov yam ntxwv tseem ceeb & qhov zoo
Txhim kho qhov kub siab -Temperature Strength:Molybdenum ho nce tensile thiab creep zog ntawm cov hlau ntawm qhov kub siab tshaj 425℃(800℃F). Qhov no tiv thaiv cov yeeb nkab los ntawm deforming los yog ua tsis tau raws li nws tus kheej load thiab sab hauv siab ntawm kev khiav hauj lwm kub.
Zoo Weldability:Txawm hais tias yog cov hlau alloy, nws cov pa roj carbon tsawg thiab tag nrho cov tshuaj muaj pes tsawg leeg ua rau nws yooj yim rau vuam siv cov txheej txheem txheej txheem.
Zoo thermal conductivity:Qhov tseem ceeb rau kev hloov hluav taws xob zoo hauv kev siv boiler thiab superheater.
Tus nqi -zoo:Nws yog kev lag luam ntau dua li siab dua- alloy steels xws li chromium-molybdenum (Cr-Mo) steels tab sis ua tau zoo dua li cov pa roj carbon steel hauv nruab nrab- qhov kub thiab txias.
3. Chemical Composition (Hom - ib ASTM A210)
| Lub ntsiab | Kev sib xyaw (%) |
|---|---|
| Cov pa roj carbon (C) | 0.17 - 0.24 |
| Manganese (Mn) | 0.70 - 1.00 |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.025 |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.025 |
| Silicon (Si) | Ntau dua lossis sib npaug li 0.10 |
| Molybdenum (hli) | 0.44 - 0.65 |
4. Mechanical Properties (Hom - ib ASTM A210)
Tensile zog:415 MPa (60,000 psi) min
Yield zog:255 MPa (37,000 psi) min
Elongation:30% min (ntawm 2-nti ntsuas qhov ntev)
5. Cov qauv thiab cov kev qhia tshwj xeeb
20MoG tau them raws li ntau tus qauv thoob ntiaj teb, uas lav nws qhov zoo, qhov ntev, thiab kev ua haujlwm.
ASTM A210 / ASME SA210 Cov Lus Qhia:Qhov no yog thawj tus qauv rau seamless nruab nrab - carbon steel boiler thiab superheater raj.Qib A-1nyob rau hauv tus qauv no yog qhov ncaj sib npaug ntawm 20MoG.
Qauv TSIS MUAJ: DIN 17175Tus qauv German, qhov twg cov khoom no hu uaib 35.8.
TS EN 10216-2:Cov txheej txheem European rau seamless raj rau lub hom phiaj siab.
6. Cov ntawv thov tseem ceeb
Cov yeeb nkab no tsuas yog siv rau hauv siab - kub, siab - qhov chaw siab:
Boiler Tubes:Phab ntsa ntawm hluav taws- raj thiab dej- raj boilers.
Superheaters:Cov seem ntawm lub boiler uas cua sov chav tshaj nws cov ntsiab lus saturation, yuav tsum tau superior siab - kub lub zog.
Thaum tshav kub kub Exchangers:Qhov twg ib qho dej hloov cua sov mus rau lwm qhov.
Cov nkoj siab:Cheebtsam uas ua haujlwm ntawm lub siab sab hauv thiab kub.
7. Kev sib piv nrog lwm yam Boiler Steels
| Qib Steel | Hom | Ntsiab Feature | Hom Siv Case |
|---|---|---|---|
| ASTM A106 Qib B | Carbon Steel | Kev pabcuam zoo, kev lag luam | Tsawg- qhov kub ntawm boiler seem, cov txheej txheem dav dav piping. |
| ASTM A210 20MoG (A-1) | Tsawg-Alloy (C-Mo) | Zoo dua siab -temp lub zog | Superheaters, nruab nrab -kub boiler seem. |
| ASTM A213 T11 / T22 | Alloy hlau (Cr-Mo) | Zoo heev -temp lub zog & oxidation kuj | High -kub superheaters, reheaters (mob hnyav dua). |
Key Takeaway
20MoG Carbon Steel Boiler Yeeb Nkabyog covmus- mus rau cov khoomthaum daim ntawv thov dhau qhov kev txwv tsis pub muaj cov pa roj carbon steel (xws li A106 Gr B) tab sis tsis xav tau cov chromium kim dua-molybdenum alloys. Nws muab ib qho zoo heev tshuav nyiaj li cassiab -kev ua haujlwm kub, weldability, thiab nqirau ntau yam kev tsim hluav taws xob thiab kev lag luam boiler tshuab.
Thaum muab cov khoom siv no, nco ntsoov xyuas kom meej tias nws tau muab nrog cov ntawv pov thawj zeb xeem los xyuas kom meej tias nws ua tau raws li cov qauv xav tau (xws li ASTM A210).
