Summary / Nyob Ib Sab
14MOV 63 akub-resistant, ferritic steeltshwj xeeb yog tsim los rau siab - kev pabcuam kub, feem ntau hauv kev tsim hluav taws xob thiab kev lag luam petrochemical. Nws cov yam ntxwv tseem ceeb yog nws lub peev xwm los tswj lub zog thiab tiv thaiv oxidation ntawm qhov kub siab (txog ~ 580 degree).
1. Taw qhia rau 14MoV63
14MoV63 yog qib German steel, qauv hauv qabTIAB SA 17175(tus qauv rau seamless raj rau lub hom phiaj siab). Lub npe tawg raws li nram no:
14: Kwv yees cov ntsiab lus carbon hauv pua pua ntawm ib feem pua (0.14%).
Mo: Molybdenum, ib qho khoom siv alloying uas ua rau kom muaj zog thiab nkag mus.
V: Vanadium, ib qho khoom siv alloying uas txhim kho lub zog thiab ruaj khov ntawm cov qauv carbide ntawm qhov kub thiab txias.
63: Ib tus cim tshwj xeeb rau qhov tshwj xeeb muaj pes tsawg leeg.
Nws yog lwm txoj hauv kev zoo tshaj rau cov pa roj carbon steel (xws li ASTM A106 Gr.B) thaum ua haujlwm kub tshaj 450 degree, qhov twg carbon steel lub zog poob qis.
2. Cov yam ntxwv tseem ceeb & cov cuab yeej
Zoo heev Creep Strength:Qhov no yog nws cov khoom tseem ceeb tshaj plaws. Creep yog qhov qeeb qeeb, mus tas li deformation ntawm cov khoom nyob rau hauv qhov kev ntxhov siab tas li ntawm qhov kub thiab txias . 14MoV63 yog tsim los tiv thaiv qhov no, ua rau nws zoo tagnrho rau kev ua haujlwm ntev - lub sijhawm ua haujlwm hauv siab - cov kab hluav taws xob siab.
Zoo Oxidation Resistance:Nws tsim ib qho ruaj khov, tiv thaiv oxide txheej uas ua rau qeeb ntxiv oxidation (scaling) ntawm qhov kub thiab txias.
Zoo Weldability:Nws tuaj yeem welded siv ntau txoj hauv kev, txawm hais tias nws yuav tsum tau ua ntej - cua sov thiab tom qab -weld kev kho cua sov (PWHT) kom tsis txhob tawg thiab kho cov microstructure hauv tshav kub- thaj chaw cuam tshuam (HAZ).
Zoo Thermal Stability:Nws cov microstructure tseem ruaj khov nyob rau lub sijhawm ntev ntawm qhov kub thiab txias, tiv thaiv embrittlement.
Nruab Nrab Tensile Strength:Siab dua carbon steel tab sis qis dua ntau chrome-moly steels.
3. Chemical Composition (Hwm % los ntawm qhov hnyav)
Cov muaj pes tsawg leeg raug tswj nruj kom ntseeg tau tias muaj kev ua haujlwm siab - kub. Ib qho piv txwv yog:
| Element | Cov ntsiab lus (%) |
|---|---|
| Cov pa roj carbon (C) | 0.10 - 0.18 |
| Silicon (Si) | 0.10 - 0.35 |
| Manganese (Mn) | 0.40 - 0.70 |
| Phosphorus (P) | max . 0.025 |
| Sulfur (S) | max . 0.020 |
| Molybdenum (hli) | 0.50 - 0.70 |
| Vanadium (V) | 0.22 - 0.32 |
| Chromium (Cr) | 0.30 - 0.60 |
| Hlau (Fe) | Tshuav |
4. Mechanical Properties (ntawm chav tsev kub)
Cov no yog qhov tsawg kawg nkaus lav cov khoom raws li cov qauv.
| Khoom | Tus nqi |
|---|---|
| Yield zog (Rp0.2) | Tsawg tshaj . 280 MPa |
| Tensile zog (Rm) | 440 - 590 MPa |
| Elongation (A) | Tsawg kawg . 20% |
Nco tseg:Nwssiab - qhov kub thiab txias(piv txwv li, creep rupture zog ntawm 500 degree, 550 degree) yog ib qho tseem ceeb tsim parameter thiab yog txhais nyob rau hauv cais cov ntaub ntawv thiab cov qauv.
5. Cov ntawv thov
14MoV63 kav yuav luag tsuas yog siv nyob rau hauv siab - kub, siab - siab tshuab:
Fais fab nroj tsuag Boilers:Superheater thiab reheater tubes, siab -kub lub taub hau, thiab cov kab tseem ceeb.
Thaum tshav kub kub Exchangers:Nyob rau hauv ib puag ncig uas cov txheej txheem roj los yog kua yog kub heev.
Petrochemical cog:Piping rau siab -kub txheej txheem ntws hauv refineries thiab tshuaj nroj tsuag.
Cheeb Tsam Cua sov Systems:Rau kev thauj khoom siab -kub dej kub lossis chav dej.
6. Cov qauv tsim nyog thiab cov qib sib npaug
14MoV63 tau them los ntawm ntau tus qauv thoob ntiaj teb. Nov yog nws qhov sib npaug sib npaug:
| Txuj | Qib/Designation |
|---|---|
| DIN / EN | 14MOV 6-3(EN 10216-2) |
| ISO | 14MOV 6-3 |
| ASTM | A213 T12 (zoo ib yam, tab sis tsis yog qhov sib npaug) |
| GB (Tuam Tshoj) | 15 CrMoG(Qhov no yog qhov sib npaug heev thiab sib npaug, feem ntau siv sib pauv hauv cov haujlwm) |
7. Fabrication thiab Vuam
Ua ntej- cua sov:Yuav tsum tau, feem ntau nyob rau hauv thaj tsam ntawm 200℃- 250℃.
Welding Consumables:Yuav tsum tau sib phim rau lub hauv paus hlau muaj pes tsawg leeg (xws li electrodes nrog Mo thiab V).
Tshaj tawm -Weld Heat Treatment (PWHT):Qhov tseem ceeb kiag li. Qhov no suav nrog cua sov cov khoom siv welded mus rau qhov kub thiab txias (feem ntau yog 680℃- 720 degree), tuav nws rau lub sijhawm suav, thiab tom qab ntawd maj mam txias nws. Cov txheej txheem no txo cov kev ntxhov siab uas seem thiab ua rau lub zog microstructure hauv thaj tsam weld.
Xaus
14MoV63 boiler steel yeeb nkabyog ib qho tshwj xeeb, siab - cov khoom ua tau zoo tsim los daws cov teeb meem ntawm cov khoom degradation nyob rau hauv lub sij hawm raug rau kub kub thiab siab. Nws qhov sib npaug ntawm Molybdenum thiab Vanadium ua rau nws tus nqi - kev xaiv zoo thiab txhim khu kev qha rau cov ntawv thov tseem ceeb hauv kev lag luam hluav taws xob, cuam tshuam qhov sib txawv ntawm carbon steel thiab kim dua -chromium steels.
