1. Decoding lub npe "25MnG"
Qhov no yog Suav tus qauv tsim qib (los ntawm GB 5310 tus qauv). Ntawm no yog txhua yam txhais tau tias:
25: Qhia tias qhov nruab nrabCov pa roj carbon (C)cov ntsiab lus yog kwv yees li0.25%. Qhov no tso rau hauv nruab nrab - carbon steel qeb.
Mn: Qhia tiasManganese (Mn)yog thawj alloying keeb. Cov ntsiab lus Manganese feem ntau yog nyob ib ncig ntawm 0.70-1.00%, uas yog siab dua hauv cov pa roj carbon steel.
G: Sawv rau"Gang"(钢), Suav lo lus rau hlau, tab sis nyob rau hauv cov ntsiab lus ntawm boiler qauv, nws tshwj xeeb txhais tau tias ib tugseamless steel yeeb nkabrau siab - kev pabcuam siab.
Hauv cov ntsiab lus yooj yim:25MnG yog aseamless nruab nrab - carbon steel yeeb nkabqhov twg Manganese yog qhov tseem ceeb ntxiv dag zog rau lub cev, tshwj xeeb yog tsim los siv rau hauv boilers thiab cov hlab ntsha siab.
2. Cov yam ntxwv tseem ceeb thiab cov khoom
25MnG yog tsim los ua kom ntseeg tau raws li qhov xav tau ntawm cov chaw tsim hluav taws xob thiab cov boilers muaj.
Zoo zog thiab toughness:Kev sib xyaw ntawm 0.25% carbon thiab siab manganese cov ntsiab lus muab qhov sib npaug zoo ntawm lub zog tensile thiab cuam tshuam toughness. Manganese tsub kom lub hardenability ntawm cov hlau, cia nws tuav lub zog ntawm kub siab dua.
Zoo heev Creep Resistance:Qhov no yog ib qho khoom tseem ceeb rau boiler raj. "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 . 25MnG yog tsim los tiv thaiv qhov deformation nyob rau lub sijhawm ntev.
Kev ua tau zoo welding:Thaum nws xav tau kev saib xyuas ntau dua li qis - carbon steels, 25MnG muaj qhov ua tau zoo weldability. Ua ntej- cua sov thiab tom qab- vuam kev kho cua sov feem ntau pom zoo kom tiv thaiv kev tawg thiab txo kev ntxhov siab.
Resistance rau Oxidation thiab Scaling:Thaum qhov kub thiab txias, hlau tuaj yeem hnov mob nrog oxygen, tsim cov nplais . 25MnG muaj qhov tsim nyog tiv thaiv qhov tshwm sim no, uas pab tswj kev ncaj ncees ntawm lub raj phab ntsa.
Siab -Tsub Yield Strength:Nws khaws ib feem tseem ceeb ntawm nws lub zog ntawm kev ua haujlwm kub ntawm boilers (feem ntau txog ~ 500℃).
3. Kev siv ntau
25MnG feem ntau yog siv hauv cov khoom hauv qab no:
Superheater Tubes:Cov hlab no raug rau qhov kub siab tshaj plaws nyob rau hauv lub boiler, qhov twg chav yog rhuab tshaj nws qhov chaw saturation.
Reheater Tubes:Zoo ib yam li superheaters, lawv rov ua kom sov dua tom qab nws tau dhau los ntawm lub siab - siab turbine.
Siab -Boiler Tubes:Rau lub ntsiab boiler seem uas ua haujlwm ntawm kev kub siab thiab kub.
Headers thiab Main Steam Pipes:Siv rau kev sib sau thiab thauj khoom siab -kub, siab - siab zog.
4. Kev sib piv nrog lwm yam Boiler Steel Pipes
| Khoom | 25 MnG | 20G (feem ntau) | 15CrMoG (Chromium{1}}Molybdenum) |
|---|---|---|---|
| Cov ntsiab lus carbon | ~0.25% | ~0.20% | ~0.15% |
| Alloying Elements | Cov pa roj carbon-Manganese | Cov pa roj carbon tsawg | Chromium, Molybdenum |
| Lub zog tseem ceeb | Zoo siab - kub lub zog, tawv dua 20G | Zoo weldability thiab ductility | Superior creep strength at higher temps (>550 degree) |
| Kev siv yam | Superheaters, Reheaters | Cov phab ntsa ntawm cov kav dej, qis dua temp headers | High-kub superheaters, siab -siab headers |
| Nqi | Nruab nrab | qis | Siab dua |
Cov ntsiab lus ntawm kev sib piv:
25MnG vs . 20G:25MnG muaj zog dua thiab siv rau qhov tseem ceeb, siab dua - qhov kub thiab txias tshaj qhov dav - lub hom phiaj 20G.
25MnG vs . 15CrMoG:15CrMoG, nrog nws cov ntsiab lus chromium thiab molybdenum, yog siv rau cov kev pabcuam hnyav dua nrog kub thiab siab xav tau ntau dua 25MnG.
5. Cov qauv thiab Specifications
Primary Standard: wb 5310- Qhov no yog Suav tus qauv rau "Seamless steel tubes thiab cov kav dej rau kev kub siab boiler." Cov txheej txheem no hais txog cov tshuaj muaj pes tsawg leeg, cov khoom siv kho tshuab, hydraulic ntsuas siab, thiab tsis yog -kev ntsuas kev puas tsuaj.
Similar International Qib:Txawm hais tias tsis muaj qhov sib npaug, cov qib zoo liASTM A210 Qib A-1lossis qee cov qib European muaj cov tshuaj lom neeg zoo sib xws thiab kev siv.
Xaus
25MnG carbon steel boiler yeeb nkabyog ib tug txhim khu kev qha thiab dav sivseamless rajrau qhov tseem ceeb siab - kub thiab siab - ntu siab nyob rau hauv qhov chaw nres tsheb fais fab boilers thiab lwm cov hlab ntsha siab. Nws qhov sib npaug ntawm cov pa roj carbon thiab manganese muab kev sib xyaw ua ke zoo heev ntawm lub zog, tawv, thiab nkag siab, ua rau nws tus nqi - kev xaiv zoo rau cov ntawv thov uas xav tau ntau dhau rau 20G tab sis tsis tas yuav kim dua chromium-molybdenum steels.
