1. Cov khoom txhais thiab cov khoom tseem ceeb
Q: Dab tsi yog ovm 519 4012 cov yeeb nkab?
A:
4012 cov yeeb nkab steel yog molybdenum alloy steel seamless yeeb (unson G40120) teev nyob rau hauv Astm ATTM A519 tus qauv. Nws cov tub ntxhais muaj pes tsawg leeg yog: 0.10% -0.15% carbon, 0.40% -0.60% Molybdenum, thiab 0.30% -0.60% manganese. Cov ntaub ntawv no yog renowned rau nws zoo creep resistance, tswj kev txhawb nqa lub zog ntau tshaj 300 MPa ntawm qhov kub ntawm 540 degree. Nws tseem ua pov thawj zoo heev Veldability thiab nruab nrab kub-thaiv, ua rau nws cov khoom nyiam rau cov khoom siv thermal ntau tiam.
2. Cov Khoom Siv Cov Neeg Kho Tshuab thiab Cov Lus Qhia
Q: Cov yam ntxwv kev ua tau zoo ntawm 4012 yeeb nkab steel?
A:
Hauv lub xeev ib txwm muaj thiab tempered, cov khoom siv tau ntawm 4012 steel yog li cas los yog sib luag rau 275 MPa, thiab elongation ntau dua lossis sib npaug li 22%. Tom qab kev kho mob kub tshwj xeeb (xws li kev ua haujlwm sov sov sov), nws txoj kev ua tau zoo tau txhim kho, ua kom muaj txiaj ntsig zoo, tswj tau cov txiaj ntsig muaj zog ntawm 220 MPA ntawm 450 degree. Feem ntau, nws lub neej tsis sib xyaw (ntawm 540℃/ 100 mpa) tuaj yeem ncav cuag cov qib ntawm 100,000 teev.
3. Raug ntawv thov cov xwm txheej
Q: Cov ntaub ntawv thov ntawm 4012 cov yeeb nkab steel?
A:
Zog thiab Fiber: Supercritical Boiler Superheater Treves, Chav Turbine Cua Ducts
Petrochemical: Hydrogenation Reactor Thaum Tshav Kub Kub Txauv, Nraum Rauv Rauv Bundles
Cov Khoom Siv Tshwj Xeeb: Nuclear Power Cog Cog Lus ParkCuit Coalric Piping, Geothermal Chav Sib Kis
Muaj Boilers: Cov Khoom Siv Siab Ntawm Cov Ntaub Pua Khov Ntawm Cov Tshuab
4. Cov ncauj lus kom ntxaws piav qhia txog cov txheej txheem kev kho cua sov
Q: Yuav ua li cas tuaj yeem ua tiav kev kho cua sov rau 4012 steel yeeb nkab tau ua kom zoo?
A:
Cov txheej txheem tau pom zoo peb-kauj ruam yog "li qub + Tempering + ruaj" stabilization ":
Li normalizing kub: 900-930℃(ua tiav authenitization);
Tempering kub: 680-720℃(tuav rau 2 teev / 25mm thickness);
Kev kho kom ruaj khov: 600℃rau 10 teev (tshem tawm qhov kev pheej hmoo ntawm microstructure kho thaum lub sijhawm ua haujlwm).
Tus txheej txheem no ua kom ntseeg tau cov khoom tswj tau ruaj khov kho microstructure thaum lub sij hawm muaj kev pab kub ntev-kev kub siab ntev.
5. Cov ntsiab lus tseem ceeb hauv kev ua thiab tswj hwm zoo
Q: Cov ntsiab lus tseem ceeb kom nco ntsoov thaum twg ua 4012 yeeb nkab?
A:
Yuav Tsum Ua Tshwj Xeeb:
Thaum lub sij hawm kub yog, qhov kawg yog tswj tau qhov kub tshaj lossis sib npaug nrog 850 degree, zam kev nthuav dav kub ntau ntawm 600-800 degree.
ER80S-B2 Vuam hlau yog pom zoo, nrog lub preheat qhov kub ntawm 150-200 degree. Kev kho mob ntxhov siab ntawm 720℃rau 2 teev yog xav tau tom qab vuam.
Tswjhwm Ntsuas Cov Ntsiab Lus Tseem Ceeb:
100% EDDY Kev Ntsuas Tam Sim No + 20%}}}}}}} вTM E213 / E94 Cov Qauv)
Kev kuaj siab ntawm Tensile Kub (tsawg kawg ib teev ntawm 450℃kev sim ib pob)
Intergranular kev sim tshuaj (ovtm A262 Xyaum E)
