Dab tsi yog qhov txwv rau ASME SA533 Qib B?
ASME SA533 Qib B feem ntau yog siv rau tuab - cov hlab ntsha muaj zog nuclear. Nws cov kev txwv tseem ceeb suav nrog qhov kub siab tshaj plaws ua haujlwm tau zoo (feem ntau nyob ib puag ncig 700∘𝐹mus rau 800 ∘ 𝐹) vim muaj kev txwv tsis pub nkag, raug cuam tshuam rau hluav taws xob embrittlement ntev - lub sij hawm nuclear kev pab cuam, thiab, zoo li feem ntau siab - lub zog steels, nyuaj weldability necessitating nruj preheat thiab post-weld heat treatment (PWHT).
ASME SA204 Qib B yog molybdenum- alloy steel phaj tshwj xeeb tsim los siv rau hauv cov welded boilers thiab lwm cov hlab ntsha siab uas npaj rau kev kub siab. Raws li ib qho ntawm qhov ntxov tshaj plaws "qis-alloy" steels, nws suav nrog Molybdenum (0.45--}} 0.60%) los txhim kho nws lub zog ntawm qhov kub thiab txias thiab muab kev nkag siab zoo dua li cov qauv carbon steels xws li SA516. Nws ua haujlwm hauv nruab nrab- cov khoom siv hauv av- muaj peev xwm ntau dua li cov pa roj carbon steel rau kev siv chav ua haujlwm, tseem muaj kev lag luam ntau dua li cov high-chromium steels zoo li SA387.
Cov yam ntxwv tseem ceeb
Ua kom kub siab zog:Ua kom muaj kev ntxhov siab ntau dua li cov pa roj carbon steel ntawm qhov kub txog li 500C (932F).
Creep Resistance:Cov ntsiab lus Molybdenum stabilizes ferrite qauv tiv thaiv qeeb deformation nyob rau hauv tshav kub.
Standard Weldability:tuaj yeem koom nrog siv cov txheej txheem, txawm hais tias nws feem ntau yuav tsum tau preheating los tiv thaiv kev tawg rau hauv tshav kub cuam tshuam.
Ductility:Khaws cov khoom zoo elongation (17-21%), ua kom muaj kev nyab xeeb thaum caij tsheb kauj vab.
Qib Qib
"SA":ASME Tshooj II (Ferrous Material) tus cim.
"533":Cov lus qhia tshwj xeeb rau Manganese-Molybdenum-Nickel alloy daim hlau.
"Qib B":Qhia meej txog Mn-Mo-Ni tshuaj tshuav nyiaj li cas
Kev sib piv (vs. SA387 Qib 11)
Oxidation Resistance:SA387 muaj Chromium, muab kev tiv thaiv zoo dua "scaling" (oxidation) dua SA204.
Hydrogen Attack:SA204 muaj kev cuam tshuam ntau dua rau siab -kub hydrogen nres (HTHA) vim nws tsis muaj Chromium pom hauv SA387.
Tus nqi:SA204 feem ntau tsis tshua kim vim tsis muaj Chromium.
Kev siv Case:SA204 yog siv rau "huv" chav / cua sov; SA387 yog siv rau corrosive refinery ib puag ncig.
Cov ntawv thov siv
Chav Drums:Hauv nruab nrab - siab zog cog boilers.
Thaum tshav kub kub Exchanger Parts:Rau cov uas tsis yog -corrosive, siab - cov kua dej kub.
Piping Supports:Cov yam ntxwv ntawm cov khoom raug rau high radiated tshav kub los ntawm boilers.
Dab tsi yog cov ntsiab lus ntawm silicon hauv ASME SA533 Qib B?
Cov ntsiab lus silicon hauv ASME SA533 Qib B feem ntau yog li ntawm 0.15% txog 0.35%. Silicon yog siv los txhim kho cov hlau deoxidation thiab ua rau cov khoom siv tag nrho lub zog thiab tsis kam mus rau siab -kub oxidation. Cov ntsiab lus ntawm silicon tswj tau pab txhim kho cov khoom ua tau zoo nyob rau hauv siab - qhov chaw siab, ua kom nws ruaj khov rau kev siv hauv kev lag luam xws li cov hlab ntsha siab thiab cov reactors.
Cov ntawv thov ntawm ASME SA533 Qib B yog dab tsi?
ASME SA533 Qib B feem ntau yog siv rau hauv kev tsim cov hlab ntsha siab, boilers, thiab lwm yam tseem ceeb hauv kev lag luam xws li kev tsim hluav taws xob, kev lag luam petrochemical, thiab hluav taws xob nuclear. Nws muaj peev xwm ua tau nyob rau hauv siab -siab thiab qis- qhov kub thiab txias ib puag ncig ua rau nws zoo tagnrho rau kev siv hauv cov hlab ntsha reactor, cov khoom siv hluav taws xob, thiab lwm yam khoom siv uas yuav tsum tau muaj zog thiab kev cuam tshuam.
Dab tsi yog sulfur ntsiab lus hauv ASME SA533 Qib B?
Cov ntsiab lus sulfur hauv ASME SA533 Qib B feem ntau txwv rau 0.035%. Cov ntsiab lus tsis tshua muaj leej faj yog qhov tseem ceeb rau kev ua kom cov hlau tsis muaj zog thiab tiv thaiv kev tsim cov khoom phom sij sulfide uas tuaj yeem ua rau cov khoom tsis muaj zog lossis ua rau muaj qhov tsis xws luag thaum vuam. Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog nyob rau hauv cov hlab ntsha siab thiab lwm yam siab - kev siv kev ntxhov siab uas cov khoom siv yog qhov tseem ceeb.
ASME SA533 Qib B steel tshuaj muaj pes tsawg leeg(%) :
|
Kev sib xyaw |
Qib B |
|
|
C Tsawg dua los yog sib npaug |
|
0.25 |
|
Mn |
Kev ntsuas kub |
1.15~1.50 |
|
Cov khoom tsom xam |
1.07~1.62 |
|
|
P Tsawg dua lossis sib npaug |
0.035 |
|
|
S Tsawg dua los yog sib npaug |
0.035 |
|
|
Si |
Kev ntsuas kub |
0.15~0.40 |
|
Cov khoom tsom xam |
0.13~0.45 |
|
|
Ni |
Kev ntsuas kub |
0.40~0.70 |
|
Cov khoom tsom xam |
0.37~0.73 |
|
|
Mo |
Kev ntsuas kub |
0.45~0.60 |
|
Cov khoom tsom xam |
0.41~0.64 |
|
Mechanical Properties
| Khoom | Tus nqi |
|---|---|
| Tensile zog | 550 - 725 MPa |
| Yield zog (0.2% offset) | Ntau dua lossis sib npaug li 345 MPa |
| Elongation hauv 50mm | Ntau dua lossis sib npaug li 18% |
| Kev txo qis ntawm cheeb tsam | Ntau dua lossis sib npaug li 35% |
| Hardness (Brinell) | 163 - 217 HB |
| Charpy V-Txoj kev cuam tshuam (10 degree) | Ntau dua lossis sib npaug li 68 J |
| Poob Nyhav NDT Kub | Tsawg dua lossis sib npaug ntawm -12 degree |
| Young's Modulus | 200 GPa |
| Fatigue Limit (107lub voj voog) | 275 MPa rau |
1. Cov ntsiab lus carbon ntawm ASME SA533 Qib B yog dab tsi?
Cov ntsiab lus carbon ntawm ASME SA533 Qib B feem ntau yog li ntawm 0.12% txog 0.18%. Cov ntsiab lus tsis tshua muaj carbon zoo txhim kho cov hlau weldability thiab txo qhov kev pheej hmoo ntawm kev tawg thaum vuam, thaum tseem tuav cov khoom siv lub zog thiab toughness. Qhov no tso cai rau nws siv rau ntau yam kev siv tseem ceeb, suav nrog cov hlab ntsha siab thiab lwm qhov chaw siab - kev ntxhov siab.
2. Dab tsi yog qhov weldability ntawm ASME SA533 Qib B?
Yog lawm, ASME SA533 Qib B yog weldable. Txawm li cas los xij, vim nws cov ntsiab lus alloy, cov txheej txheem vuam tshwj xeeb yuav tsum tau ua kom ntseeg tau siab -welds zoo. Preheating thiab post-weld heat treatment (PWHT) tej zaum yuav xav tau, tshwj xeeb tshaj yog rau cov phaj tuab, txhawm rau txo cov kev ntxhov siab thiab txo qhov kev pheej hmoo ntawm kev tawg. Kev siv cov ntaub ntawv muab tub lim tsim nyog kuj tseem ceeb los tswj cov khoom siv kho tshuab hauv thaj chaw welded.
3. Cov ntsiab lus phosphorus hauv ASME SA533 Qib B yog dab tsi?
Cov ntsiab lus phosphorus hauv ASME SA533 Qib B raug txwv rau qhov siab tshaj plaws ntawm 0.035%. Cov ntsiab lus phosphorus tsawg yog qhov tseem ceeb los xyuas kom meej tias cov hlau tseem khov thiab tsis ua nkig, tshwj xeeb tshaj yog thaum raug kub siab thiab qis qis. Kev tswj hwm cov ntsiab lus phosphorus pab tiv thaiv kev tsim cov teeb meem cuam tshuam uas tuaj yeem cuam tshuam cov khoom siv kho tshuab.
4. Dab tsi yog txheej txheem kev kho cua sov rau ASME SA533 Qib B?
ASME SA533 Qib B feem ntau yog cua sov-kho los ntawm quenching thiab tempering. Cov khoom yog rhuab mus rau ib tug kub kub, quenched mus cuag ib tug hardened qauv, thiab ces tempered kom txo brittleness thaum tuav lub zog. Cov txheej txheem kev kho cua sov no txhim kho cov khoom siv tag nrho cov khoom siv, xws li lub zog tensile, yield zog, thiab toughness, ua rau nws haum rau siab - kev nyuaj siab thiab qis - kub daim ntawv thov.
5. Lub zog tensile ntawm ASME SA533 Qib B yog dab tsi?
Lub zog tensile ntawm ASME SA533 Qib B yog feem ntau ntawm 70 ksi thiab 90 ksi (485-620 MPa). Lub zog tensile siab no ua kom ntseeg tau tias cov khoom siv tuaj yeem tiv taus cov kev ntxhov siab tseem ceeb, ua rau nws zoo tagnrho rau kev siv xws li cov hlab ntsha siab, cov khoom siv hluav taws xob, thiab lwm yam tseem ceeb uas lub zog thiab kav ntev yog qhov tseem ceeb.
6. Dab tsi yog qhov toughness ntawm ASME SA533 Qib B?
ASME SA533 Qib B tshwj xeeb yog tsim los tswj nws qhov hnyav ntawm qhov kub thiab txias, feem ntau qis li -50℃F (-46℃). Cov khoom siv raug kuaj xyuas kom ntseeg tau tias nws ua tau zoo nyob rau hauv cov xwm txheej nyuaj. Nws feem ntau qhia tau hais tias qhov tsawg kawg nkaus lub zog nqus ntawm 20 ft-lbs (27 J) ntawm qhov kub qis no, ua rau nws tsim nyog siv rau hauv qhov chaw cryogenic lossis lwm yam kev siv uas qhov kub tsis tshua muaj kev cuam tshuam yog qhov tseem ceeb.
7. Dab tsi yog manganese cov ntsiab lus hauv ASME SA533 Qib B?
Cov ntsiab lus manganese hauv ASME SA533 Qib B feem ntau yog li ntawm 0.60% txog 1.30%. Manganese yog ib qho tseem ceeb alloying ntsiab uas txhim kho cov khoom lub zog, hardness, thiab toughness. Nws kuj tseem pab hauv deoxidation thaum lub sij hawm tsim cov hlau thiab ua rau cov khoom tsis kam hnav thiab deformation. Cov ntsiab lus manganese plays lub luag haujlwm tseem ceeb hauv kev ua haujlwm ntawm SA533 Qib B hauv kev thov kev thov.
Tau txais nqe lus hais rauASME SA533 Qib B, Hu rau GNEE Steel
