Qhov txawv ntawm Q245R thiab Q345R yog dab tsi?
Q245Rthiab Q345R yog ob qho tib si Suav siab lub nkoj steel daim hlau (R-Rongqi, lub ntsiab lus ntawm lub nkoj), tab sis lawv sib txawv feem ntau hauv lub zog, tshuaj muaj pes tsawg leeg, thiab kev thov kom haum.Q345Rmuaj zog yield zog (Ntau dua los yog sib npaug rau 345 MPa) thiab Mn cov ntsiab lus piv rauQ245R(Ntau dua lossis sib npaug rau 245 MPa), muab lub zog zoo dua, thaum Q245R muaj kev tiv thaiv corrosion zoo dua hauv cov chaw tshwj xeeb xws li ntub dej 𝐻2𝑆.
Q245Ryog ib qho tshwj xeeb carbon steel phaj qib nruj tswj nyob rau hauv Suav teb tus qauvGB/T 713(yav tas los GB 713-2008) siv rau hauv boilers thiab siab hlab ntsha. Lub npe siv tau zoo heev: "Q" sawv rauQu(Yield Strength), "245" sawv cev rau nws qhov tsawg kawg nkaus yield zog hauv Megapascals (MPa), thiab "R" sawv cev rauRong(Vessel Siab). Nws yog engineered raws li ib tug siab - zoo, tag nrho tua steel nrog tsawg theem ntawm impurities xws li sulfur thiab phosphorus. Vim tias nws cov tshuaj muaj pes tsawg leeg, nws muab kev ntseeg siab thiab tus nqi - siv tau zoo rau kev tsim cov khoom siv uas tswj cov kua dej siab ntawm qhov kub thiab txias (txog 400 degree), qhov siab - alloy khoom tsis tas yuav tsum tau.
Cov yam ntxwv tseem ceeb
Exceptional Weldability:Vim nws qhov sib npaug ntawm cov pa roj carbon tsawg, nws tuaj yeem welded siv ntau txoj hauv kev yam tsis muaj qhov xav tau siab ua ntej.
Superior Ductility:Qhia txog qhov muaj txiaj ntsig elongation siab (feem ntau 25%), tso cai rau cov khoom kom deform yam xyuam xim thaum muaj kev ntxhov siab.
Tsawg-Tsub Toughness:Feem ntau dhau V-qhov ntsuas qhov cuam tshuam los xyuas kom meej tias nws tseem ntseeg tau hauv qhov chaw txias dua.
Stable Thermal Expansion:Nws cov coefficient ntawm kev nthuav dav yog zoo- txuam nrog cov qauv carbon steel piping, txo thermal stress ntawm pob qij txha.
Uniform Internal Structure:Tsim los xyuas kom muaj kev huv huv thiab tsawg tsawg hauv laminations lossis suav nrog.
Qib Qib
Q:Stands rau Yield Strength.
245:Yam tsawg kawg yield zog ntawm 245 MPa.
R:Stands rau Lub Nkoj Siab.
Kev sib piv (vs. Q345R)
Strength Gap:Q245R muaj qhov qis qis (245 MPa) piv rau Q345R (345 MPa), yuav tsum tau cov phaj tuab rau tib lub siab.
Formability:Q245R feem ntau softer thiab yooj yim rau txias- daim ntawv los yog yob rau hauv txoj kab uas hla nruj dua Q345R.
Nqi Factor:Q245R feem ntau pheej yig dua rau ib tuj, ua rau nws qhov kev xaiv zoo tshaj plaws rau qis- rau- cov haujlwm nruab nrab siab.
Qib Alloying:Q345R muaj ntau dua Manganese thiab taug qab micro- alloys; Q245R yog ib qho yooj yim carbon-manganese hlau.
Daim Ntawv Thov Kev Sib Tham
Industrial Boiler Plhaub:Lub ntsiab sab nrauv ntawm qis -siab chav boilers.
LPG Cia Tank:Cov tso tsheb hlau luam tso rau cov roj liquefied roj hauv cov chaw nyob lossis chaw ua haujlwm.
Heat Exchanger Plhaub:Siv nyob rau hauv HVAC los yog tshuaj ua rau lub tsev tub raj bundles.
Cua Txais:Cov tso tsheb hlau luam siab siv los khaws cov cua compressed rau pneumatic machinery.
Kev Kho Dej Siab Tank:Siv nyob rau hauv filtration thiab softening systems nyob rau hauv lub municipal water nroj tsuag.
Cov kev lag luam twg siv Q245R steel?
Q245R feem ntau yog siv rau hauv kev lag luam uas xav tau cov hlab ntsha siab, boilers, thiab lwm yam khoom siv raug kub siab thiab nruab nrab kub. Cov kev lag luam no suav nrog kev tsim hluav taws xob, kev ua tshuaj lom neeg, roj thiab roj, thiab petrochemicals. Nws weldability thiab lub zog ntawm qhov kub siab ua rau nws yog qhov kev xaiv zoo tshaj plaws rau kev tsim cov hlab ntsha thiab cov tso tsheb hlau luam hauv cov kev lag luam no.
Qhov siab tshaj plaws thickness ntawm Q245R yog dab tsi?
Q245R steel feem ntau tuaj yeem siv rau hauv cov tuab xws li 6 hli txog 50 hli rau cov hlab ntsha siab. Rau cov ntu tuab, kev kho cua sov ntxiv, xws li normalizing lossis annealing, tej zaum yuav tsim nyog los xyuas kom meej cov khoom zoo ib yam. Cov khoom siv tuaj yeem siv ntau yam thicknesses nyob ntawm seb qhov kev xav tau tshwj xeeb ntawm lub nkoj siab lossis kev siv boiler.
Q245R puas tuaj yeem welded?
Yog lawm, Q245R muaj weldability zoo heev. Nws yog feem ntau welded siv cov txheej txheem vuam xws li SMAW, GMAW, thiab GTAW. Preheating tej zaum yuav xav tau rau cov seem tuab kom tsis txhob tawg, tshwj xeeb tshaj yog nyob rau hauv qis kub. Tom qab-weld kev kho cua sov kuj tuaj yeem txhim kho cov khoom siv kho tshuab thiab txo cov kev ntxhov siab nyob hauv cov pob qij txha welded, ua kom lub zog thiab kev ncaj ncees.
Q245R cov khoom siv tshuaj lom neeg, Q245R cov khoom siv:
| Qib | C % | Si% | Mn% | Cu% | Ni% | Cr% | Mo% | V % |
| Q245R | 0.20 | 0.35 | 0.5-1.10 | 0.30 | 0.30 | 0.30 | 0.08 | 0.05 |
| Ti % | Alt% | P % | S % | Nb | ||||
| 0.03 | 0.02 | 0.025 | 0.01 | 0.05 |
Q245R cov khoom siv kho tshuab, Q245R cov khoom siv:
| Qib | Thickness (hli) | Min Yield | Tensile | Elongation | Min Impact Zog | |
| Qib | Min J | |||||
| Q245R | 3-16 | 245 Mpa | 400-520 Mpa | 25% | 0 | 34J |
| 16-36 | 235mpa ua | 400-520 Mpa | 25% | 0 | 34J | |
| 36-60 | 225 Mpa ua | 400-520 Mpa | 25% | 0 | 34J | |
| 60-100 | 205 Mpa ua | 390-510 Mpa | 24% | 0 | 34J | |
| 100-150 | 185mpa ua | 380-500 Mpa | 24% | 0 | 34J | |
| 150-250 | 175mpa ua | 370-490 Mpa | 24% | 0 | 34J | |
1. Cov tshuaj muaj pes tsawg leeg ntawm Q245R yog dab tsi?
Cov tshuaj muaj pes tsawg leeg ntawm Q245R steel feem ntau suav nrog cov pa roj carbon (0.18-0.22%), manganese (0.60-1.20%), silicon (0.15-0.30%), phosphorus (tsawg dua lossis sib npaug li 0.035%), sulfur (tsawg dua lossis sib npaug li 0.035%) tshaj li 0. Qhov sib npaug yog hlau (Fe). Qhov kev sib xyaw no ua kom muaj kev sib xyaw ua ke zoo ntawm lub zog, weldability, thiab formability, ua Q245R haum rau cov hlab ntsha siab thiab boilers.
2. Q245R ua haujlwm li cas ntawm qhov kub siab?
Q245R ua tau zoo ntawm nruab nrab mus rau qhov kub thiab txias, nrog kev ua haujlwm zoo rau thermal degradation. Nws feem ntau yog siv rau hauv cov ntawv thov uas qhov kev ua haujlwm kub nce mus txog 450℃(840℃F). Txawm hais tias nws tsis yog tsim los rau siab - daim ntawv thov kub siab tshaj 500 degree, nws cov khoom, xws li lub zog thiab elongation, nyob ruaj khov nyob rau hauv cov kev khiav hauj lwm kub ntau yam ntawm feem ntau cov txheej txheem.
3. Lub zog tawm ntawm Q245R yog dab tsi?
Lub zog tawm los ntawm Q245R feem ntau yog nyob ib ncig ntawm 245 MPa (35 ksi). Qhov nruab nrab tawm los lub zog no tso cai rau nws tiv taus lub siab tseem ceeb hauv qhov qis- qhov kub thiab txias yam tsis ua haujlwm. Qhov no ua rau nws yog qhov kev xaiv zoo tshaj plaws rau cov hlab ntsha siab thiab lwm yam kev siv cov txheej txheem uas yuav tsum tau muaj zog thiab tawv nqaij nyob rau hauv cov xwm txheej cryogenic.
4. Dab tsi yog lub luag haujlwm ntawm manganese hauv Q245R?
Manganese nyob rau hauv Q245R plays lub luag haujlwm tseem ceeb hauv kev txhim kho cov hlau qhov toughness thiab hardness. Nws kuj tseem txhim kho cov hlau muaj peev xwm tiv thaiv oxidation thaum kho cua sov. Manganese yog ib qho tseem ceeb ntawm cov khoom siv alloying uas pab ua kom cov khoom muaj zog, tshwj xeeb tshaj yog nyob rau hauv qhov kub thiab txias, thiab txhawb cov weldability ntawm Q245R, ua rau nws zoo tagnrho rau kev tsim cov hlab ntsha.
5. Q245R siv rau dab tsi?
Q245R yog qib carbon steel siv feem ntau hauv kev tsim cov hlab ntsha thiab boilers. Nws yog feem ntau siv hauv kev lag luam xws li kev tsim hluav taws xob, kev ua tshuaj lom neeg, thiab roj thiab roj. Nws cov ntsiab lus tsis tshua muaj carbon thiab zoo weldability ua rau nws zoo tagnrho rau kev tsim cov khoom siv uas yuav raug rau ob qho tib si siab thiab nruab nrab kub, nrog rau cov hlab ntsha siab, cov khoom siv hluav taws xob, thiab cov reactors.
6. Lub zog tensile ntawm Q245R yog dab tsi?
Lub zog tensile ntawm Q245R yog li ntawm 410 MPa rau 550 MPa (60-80 ksi). Qhov ntau yam no ua kom ntseeg tau tias Q245R muaj peev xwm tiv taus lub zog tensile ntau thaum tswj tau zoo rau kev ua tsis tiav. Cov khoom muaj peev xwm tswj tau lub zog ntawm qhov kub siab ua rau nws zoo rau kev siv hauv cov hlab ntsha siab, boilers, thiab reactors.
7. Q245R ua haujlwm li cas hauv qhov chaw corrosive?
Q245R tsis yog qhov muaj zog corrosion-resistant. Nws yog tsim los rau siab -siab thiab nruab nrab- daim ntaub ntawv kub, tab sis rau ib puag ncig raug corrosion hnyav (xws li cov av noo los yog acid- nplua nuj ib puag ncig), ntxiv corrosion- cov coatings resistant los yog kev kho deg feem ntau tsim nyog. Cov hlau tsis muaj steel lossis siab - cov ntaub ntawv alloyed zoo dua rau qhov chaw corrosive heev.
Thov kev tshaj lij rau Q245R los ntawm GNEE Steel.
