1. Dab tsi yog "25mng" txhais tau tias?
Lub npe yog Suav txheej txheem (GB) uas tawg raws li hauv qab no:
25: Sawv cev rau kwv yees kwv yees cov ntsiab lus carbon cov ntsiab lus, uas yog hais txog0.25%Cov. Nov yog ib nrab -} cov hlau.
Mn: Cov cim tshuaj lom rauTus kws dai txiv manganeseCov. Qhov no qhia nws yog manganese -} raws cov hlau.
G: Sawv rau"Gang" (钢)uas txhais tau tias "hlau" hauv Suav, tab sis nyob rau hauv cov ntsiab lus no, nws qhia tshwj xeeb tias cov hlau yog qhov haum rauhigh - Siab Kev Siv Cov Kev Siv.
Yeej tseem ceeb,25MNG yog ib tug neeg siv cov yeeb nkab uas ua los ntawm nruab nrab-} mackbanese steel, tshwj xeeb tsim los siv hauv boilers thiab siab cov hlab ntsha.
2. Cov yam ntxwv tseem ceeb thiab cov yam ntxwv
25mng yog muaj nuj nqis rau nws cov txiaj ntsig zoo ua ke, kev muaj zog, thiab weldability, uas yog qhov siab rau siab {{{2}-}}}}}}}}}}}} qhov chaw dej khov.
Lub zog siab:Kev sib xyaw ua ke ntawm cov pa roj carbon thiab manganese muab cov tensile zoo thiab lees txais cov kav dej kom tiv thaiv lub siab sab hauv.
Zoo toughness thiab ductility:Nws tswj hwm cov kev cuam tshuam zoo thiab muaj peev xwm deform yam tsis muaj pob txha, uas tseem ceeb heev rau kev nyab xeeb hauv cov ntawv thov siab.
Zoo heev creep:Qhov no yog cov cuab yeej tseem ceeb rau boiles leeg. "Nkag" yog qhov qeeb, deformation qeeb, muaj kev cuam tshuam tas mus li ntawm kev ntxhov siab tas li ntawm kev ntxhov siab ntawm qhov siab. 25 mng yog tsim los tiv thaiv cov nyhuv.
Zoo weldability:Thaum tsis yog weldable li tsawg - Cov txheej txheem carbon hlau, nws tuaj yeem welded cov txheej txheem (Pre6- Weld Kev Kho Mob Kub yog feem ntau pom zoo).
Oxidation tsis kam:Nws tau tsim nyog tsis kam rau kev ntsuas (oxidation) ntawm kev nce siab kub.
3. Cov ntawv thov tseem ceeb
Raws li boiler raj steel, nws thawj qhov kev siv yog nyob rau hauv lub zog tiam thiab petrochemical Industries:
Siab - Siab Lub Siab Boiles Tubes:Siv rau superheaters, rheaters, accelerizers, thiab dej phab ntsa lauj kaub hauv pob zeb roj teeb hluav taws xob.
Piping siab:Txog kev tsim khoom lag luam hauv cov nroj tsuag tshuaj thiab cov roj ua kom raws li kev kub siab.
Seamless Steel ROJ LI:Nws lub zog thiab kev ntseeg tau ua nws haum rau muaj cov roj av compressed.
4. Cov Qauv Txheej Txheem thiab cov qhab nia sib npaug
25mng yog feem ntau txhais los ntawm Suav tus qauvGB 5310Cov. Txawm li cas los xij, nws tau nyob ze sib txig hauv cov qauv thoob ntiaj teb.
| Lub hom phiaj | Teem nqi | Qhov sib piv cov qhab nia thoob ntiaj teb |
|---|---|---|
| GB 5310 | 25Mng | Qhov no yog thawj tus qauv rau high -} siab hlav hlab nyob hauv Suav teb. |
| Din 17175 | St 35.8, st 45.8 (zoo sib xws hauv daim ntawv thov, txawm yog Chemistry, tseem yog qhov txawv) | |
| ASTM A192 / A210 | A210 Qib C(Qhov no yog qhov sib ze heev thiab muaj feem sib npaug) | |
| En 10216-2 | P235GH, P265GHGHGE (cov no yog European siab rau cov neeg ua haujlwm hlau nrog kev ua tau zoo sib xws) |
Nco tseg:Thaum cov qhab nia no zoo sib xws thiab feem ntau siv nyob rau hauv cov ntawv thov sib piv, lawv tsis yog ib txwm ncaj qha tshuaj thiab cov khoom siv txhua yam. Cov qib tshwj xeeb yuav tsum tau qhia txog qhov project yuav tsum tau teev los ntawm tus tsim qauv engineer raws li kev ua haujlwm.
5. Tshuaj lom neeg sib xyaw (raug los ntawm GB 5310)
Cov muaj pes tsawg leeg tau tswj kom nruj kom ntseeg tau tias ua tau zoo.
| Lub ntsiab | Cov ntsiab lus (%) |
|---|---|
| Carbon (c) | 0.22 - 0.29 |
| Silicon (si) | 0.17 - 0.37 |
| Manganese (mn) | 0.70 - 1.00 |
| Phosphorus (p) | Tsawg dua los yog sib npaug rau 0.025 |
| Sulphur (s) | Tsawg dua los yog sib npaug rau 0.015 |
| Chromium (cr) | Tsawg dua los yog sib npaug rau 0.25 |
| Npib tsib caug (ni) | Tsawg dua los yog sib npaug rau 0.25 |
| Tooj Liab (Cu) | Tsawg dua los yog sib npaug rau 0.20 |
6. Cov Khoom Siv Neeg Kho Tshuab (Raug los ntawm GB 5310)
Cov khoom sib txawv sib txawv nrog kev kho cua sov lub xeev thiab phab ntsa thickness.
| Ntiag tug | Tus nqi |
|---|---|
| Yield zog (RP0.2) | Ntau dua los yog sib npaug rau 255 MPa (lossis 275 MPa, nyob ntawm qhov loj me) |
| Lub zog tensile (RM) | Ntau dua los yog sib npaug rau 485 mpa |
| Elongation (a) | Ntau dua los yog sib npaug rau 21% |
| Kev Cuam Tshuam Lub Zog | Teev nyob rau hauv chav tsev kub; Raws li cov qib uas yuav tsum muaj. |
Lub ntsiab
Hauv ntej,25Mng Seamless Hlau Yeeb NkabYog ib qho kev ntseeg siab, nruab nrab - lub zog, thiab siab}}}}}}} qhov kev siv ntsuas kub rau cov nroj tsuag fais fab. Nws cov ntsiab lus tseem ceeb yog nwsCreep Kuj thiab cov weldability zoo, ua nws cov khoom siv hauv lub zog.
Thaum sourcing cov khoom no, ib txwm ua kom nws tau muab rau kom tsim nyogGB 5310 Daim Ntawv Pov Thawj Tes Haujlwm thiab Mill Cov Ntawv Pov Thawjkom txheeb xyuas nws cov tshuaj thiab cov khoom siv mechanies.
