Lub ntsiab
12CR2Mog yog Suav qib qib (GB 5310) rau Seamless Steel kav tsim rau high- kev pab kub. Nws tsim qauv muab cov ntaub ntawv tseem ceeb txog nws muaj pes tsawg leeg:
12: Kwv yees li 0.12% cov ntsiab lus carbon.
Tus cr2: Kwv yees li 2% chromium cov ntsiab lus.
Mo: Muaj molybdenum.
G: Sawv rau "laib" (钢), cov lus hauv Suav teb rau hlau, qhia tias nws yog yeeb nkab rau high {}}} kub kev pab.
Cov txheej txheem sib npaug hauv cov txheej txheem thoob ntiaj teb (ASME / SA) yogASTM A335 P22Cov. Nws yog ib qho classic nkag -} tiv taus hlau.
Tshuaj lom neeg tshuaj lom neeg (raws li GB 5310 tus qauv)
Cov tshuaj lom neeg muaj pes tsawg leeg yog qhov tseem ceeb rau kev ua tiav qhov xav tau siab - cua sov.
| Lub ntsiab | Cov ntsiab lus (%) |
|---|---|
| Carbon (c) | 0.08 ~ 0.15 |
| Silicon (si) | Tsawg dua los yog sib npaug rau 0.50 |
| Manganese (mn) | 0.40 ~ 0.70 |
| Chromium (cr) | 2.00 ~ 2.50 |
| Molybdenum (mo) | 0.90 ~ 1.20 |
| Phosphorus (p) | Tsawg dua los yog sib npaug rau 0.025 |
| Sulphur (s) | Tsawg dua los yog sib npaug rau 0.025 |
| Npib tsib caug (ni) | Tsawg dua los yog sib npaug rau 0.30 |
| Tooj Liab (Cu) | Tsawg dua los yog sib npaug rau 0.20 |
| Vanadium (V) | Tsawg dua los yog sib npaug rau 0.02 |
Cov Khoom Siv Neeg Kho Tshuab (tom qab kev kho cua sov kom tsim nyog)
Cov khoom siv mechanical nyob ntawm cov kev kho cua sov (piv txwv li, li qub thiab tempered).
| Ntiag tug | Tus nqi |
|---|---|
| Lub zog tensile (RM) | Ntau dua los yog sib npaug rau 415 MPa (60 ksi) |
| Yield zog (RP0.2) | Ntau dua los yog sib npaug rau 205 MPa (30 ksi) |
| Elongation (a) | Ntau dua los yog sib npaug rau 22% |
| Hardness (HB) | Tsawg dua los yog sib npaug rau 165 |
Cov yam ntxwv tseem ceeb thiab cov txiaj ntsig zoo
Zoo heev - kub lub zog:Nws thawj qhov txiaj ntsig yog nws muaj peev xwm tswj hwm cov kev siv tshuab muaj zog ntawm cov kub (feem ntau txog 580-590℃/ 1076-1094℃f).
Zoo creep resistance:Nws tawm tsam "nkag" - qeeb, deformation uas tshwm sim hauv kev ntxhov siab thaum muaj kub ntev. Qhov no yog qhov tseem ceeb rau cov khoom sib xyaw uas ua haujlwm hauv txoj kev siab rau ntau caum xyoo.
Txhim Kho Oxidation & Corrosion Kuj:The ~2.25% Chromium content provides significantly better resistance to oxidation (scaling) and sulfur corrosion compared to carbon steels, making it suitable for boiler and refinery environments.
Zoo weldability:While it requires pre-heating and post-weld heat treatment (PWHT) to avoid cracking and restore the microstructure, it is generally considered to have good weldability for a Cr-Mo alloy steel.
Cov ntawv thov MAIN
12Cr2MoG pipes are used in critical high-temperature and high-pressure environments:
Power tiam Boilers:
Soj Ntsuam Superheater
Ua Kev Txiav Txim Siab
Cov Kav Hauv Paus tseem ceeb
High -} kub taub hau
Petrochemical Kev Lag Luam:
Lub tshuab nqus dej (piv txwv li, hauv catalytic cracking thiab hydrocacking chav)
Tub Rog Tshav Kub Kub
Siab Hlab Hlua Ua Haujlwm Ntawm Kev Kub Siab
Kev tsim khoom thiab kev kho cua sov
Txheej txheem tsim khoom:Feem ntau tsim tau siv kub -}} txheej txheem los tsim lub raj ntawm lub raj, uas yog txias}}} pilgered rau qhov kawg loj thiab phab ntsa tuab.
Kev Kho Cua Sov:Kom ua tiav qhov xav tau microstructure thiab cov khoom siv neeg kho tshuab, 12cr2mog kav yogib txwm muab rau hauv qhov qub thiab tempered.
Normalizing:Rhaub rau ib ncig ntawm 900 - 960} 960℃thiab tom qab ntawd {txias los ua tus qauv nplua-grained.
Tempering:Rov ua dua rau qhov kub siab tshaj 680℃thiab tom qab ntawd txias los daws kev ntxhov siab thiab txhim kho.
Sib piv nrog cov qhab nia zoo sib xws
15crmog (p12):Muaj qis chromium (~ 1.0%) thiab molybdenum (~ 0.5%). Nws tau siv rau kev pab kub me dua li muaj 12cr2mog.
A335 P91 / 10CR9MO1VNB (T91):Ib qeb tshiab, muaj zog dua uas suav nrog Vanadium thiab Niobium. Nws tso cai rau thinner yeeb nkab phab ntsa ntawm tib lub siab thiab kub, tab sis muaj kev nkag siab sov thiab vuam cov txheej txheem.
Cov kev txiav txim tseem ceeb rau kev siv
Vuam:Yuav tsum tau cov txheej txheem nruj, suav nrog:
Kom kom muaj electrode xaiv (piv txwv li, E9015-B3 / R307).
Yuav tsum ua pre - cua sov (feem ntau 200-300 degree).
Yuav tsum tau tshaj tawm - Weld Kev Kho Mob Cua Sov (PWT) kom npau taws lub ntsej muag weld thiab tsis txhob muaj nkig teb microstructure.
Soj Ntsuam Zoo:Cov kav dej yuav raug rau tsis- kev sim tshuaj ntsuam (ndt) zoo li kev sim ultrasonic thiab EDDY.
Hauv cov ntsiab lus xaus,12CR2Cog Seamless Steel Yeeb Nkabyog cov khoom ua haujlwm ua haujlwm rau siab - kub, siab} {} {}} qhov tseeb, muaj zog, thiab oxidation tsis kam.
