Q345Ryog Suav tus txheej txheem siab lub nkoj steel phaj, uas yog tsawg- alloy siab{1}} lub zog steel. Nws yog dav siv nyob rau hauv kev tsim cov hlab ntsha xws li boilers thiab cia tank, nrog zoo toughness thiab weldability hloov mus rau hnyav ua hauj lwm tej yam kev mob.
Q345R daim hlau hu ua siab hlab ntsha hlau phaj qee zaum. Cov phaj no suav nrogcarbon hlauthiabhlau alloyrau high/intermediate/low-kub siv.
Q345R Boiler Zoo Steel Phaj Chemical Element:
| Element | Min | Max | Zoo sib xws |
|---|---|---|---|
| V | 0.1500 | 0.3000 | - |
| Cu | - | 0.2500 | - |
| Si | - | 0.5500 | - |
| S | - | 0.0150 | - |
| P | - | 0.0250 | - |
| Mn | 1.2000 | 1.6000 | - |
| C | - | 0.2000 | - |
| Al | 0.0200 | - | - |
| Ni | - | 0.3000 | - |
| Cr + Ni + Cu + Mo | - | 0.7000 | - |
| Cr | - | 0.3000 | - |
| Mo | - | 0.0800 | - |
| Cu | - | 0.3000 | - |
| V | - | 0.0500 | - |
| Ti | - | 0.0300 | - |
| Nb | - | 0.0500 | - |
| S | - | 0.0100 | - |
| Mn | 1.2000 | 1.7000 | - |
| C | - | 0.2000 | - |
| Al | 0.0200 | - | - |
Q345R Siab Vessel Steel Mechanical Properties:
| Yield Rp0.2(MPa) |
Tensile Rm(MPa) |
Kev cuam tshuam KV/Ku (J) |
Elongation A (%) |
Kev txo qis hauv ntu ntu ntawm pob txha Z (%) |
Raws li -Heat-Kev Kho Mob | Brinell NMness (HBW) |
|---|---|---|---|---|---|---|
| 886 (Ntau dua lossis sib npaug) | 259 (Ntau dua lossis sib npaug) | 21 | 12 | 43 | Kev daws thiab Kev laus, Annealing, Ausaging, Q + T, thiab lwm yam | 131 |
Q345R PVQ Steel Phaj Lub Cev Khoom:
| Kub (degree) |
Modulus ntawm elasticity (GPa) |
Lub ntsiab lus coefficient ntawm thermal expansion 10-6 / (degree) ntawm 20 (degree) thiab | Thermal conductivity (W / m· degree) |
Tshwj xeeb thermal muaj peev xwm (J / kg · degree) |
Tshwj xeeb hluav taws xob resistivity (Ω mm² / m) |
Qhov ntom (kg/dm³) |
Poisson tus coefficient, ν |
|---|---|---|---|---|---|---|---|
| 41 | - | - | 0.31 | - | |||
| 223 | 459 | - | 22.3 | 332 | - | ||
| 853 | - | 32 | 41.2 | 224 | 412 |
qhov zoo
Zoo heev Mechanical Properties: Nws muaj zog yield zog thiab tensile zog, txuam zoo toughness. Qhov kev sib npaug no ua kom nws tuaj yeem dais nruab nrab siab thiab thauj khoom ruaj khov hauv kev ua haujlwm hnyav, tsis txhob deformation lossis tawg.
Zoo Weldability thiab Formability: Nws yog ib qho yooj yim rau welding nrog cov txheej txheem ntau lawm (kev tuav arc vuam, thiab lwm yam) yam tsis muaj qhov tsis xws luag. Nws kuj hloov tau zoo rau dov, dabtsi yog khoov thiab stamping, ua kom yooj yim rau kev tsim khoom ntawm ntau lub nkoj siab.
High Purity thiab Corrosion Resistance: Cov txheej txheem smelting Advanced txo cov impurities xws li sulfur thiab phosphorus. Nws muaj kev tiv thaiv zoo rau nruab nrab thiab tsis muaj zog corrosive media, txuas ntxiv kev pab cuam lub neej nyob rau hauv petrochemical thiab thermal zog daim ntaub ntawv.
Tus nqi - Ua tau zoo thiab dav Adaptability: Piv nrog rau siab - alloy steels, nws muaj nqi ntau lawm. Nws ua haujlwm ruaj khov hauv -20℃txog 475 degree, haum rau ntau yam kev lag luam xws li metallurgy, municipal engineering thiab nuclear power auxiliary equipment.
Cov txheej txheem siv rau Q345R
Smelting txheej txheem: Txais kev hloov pauv / hluav taws xob rauv smelting, ua ke nrog LF refining thiab RH nqus degassing. Nws zoo tshem cov sulfur, phosphorus thiab lwm yam impurities, optimizes tshuaj muaj pes tsawg leeg, thiab ua kom cov hlau purity.
Txheej txheem txheej txheem: Feem ntau suav nrog kub dov, txias khoov thiab stamping. Kub dov guarantees uniform thickness thiab txhua yam khoom; kev tsim cov kev txwv yog nruj me ntsis tswj kom tsis txhob tawg.
Vuam txheej txheem: Siv phau ntawv arc vuam, submerged arc vuam, thiab lwm yam. Matched welding cov ntaub ntawv yog siv, nrog preheating thiab post-welding tshav kub kev kho mob kom tshem tawm kev ntxhov siab.
Kev tshuaj xyuas: Ua tsis yog{0}} kuaj kev puas tsuaj (ultrasonic, radiographic) tom qab vuam, thiab tshuaj xyuas cov khoom siv thiab tshuaj lom neeg kom ntseeg tau tias tsis muaj qhov tsis xws luag.
Cov ntsiab lus tseem ceeb rau kev hloov pauv
Thaum hloov Q345R nrog qhov sib npaug zoo liASME SA516 Gr . 70, koj yuav tsum xyuas:
Kev ntsuam xyuas cuam tshuam: Xyuas kom lub V-notch cuam tshuam lub zog ua tau raws li qhov tshwj xeeb tsim qhov kub thiab txias.
Lub xeev xa khoom: Paub meej tias lub phaj yuav tsum yogLi qub(tus qauv rau Q345R) lossis raws li - dov.
Thickness Kho: Cov txiaj ntsig ntawm lub zog yuav txawv me ntsis raws li phaj thickness nce thoob cov qauv sib txawv.
Tiv tauj peb ntawm beam@gneesteelgroup.com rau tus nqi, kev txhawb nqa, lossis kev daws teeb meem. Peb yeej ib txwm npaj los txhawb koj qhov project.
Q345R ua raws li tus qauv dab tsi?
Q345R ua raws li Suav teb chaws tus qauv GB/T 713-2014. Cov txheej txheem no qhia txog cov kev cai, kev xeem, kev soj ntsuam cov cai thiab lwm yam ntsiab lus rau cov pa roj carbon thiab alloy steel phaj rau cov hlab ntsha siab.
Dab tsi yog qhov cuam tshuam toughness ntawm Q345R?
Q345R yuav tsum muaj qee qhov cuam tshuam rau qhov hnyav ntawm chav tsev kub lossis qis qis (feem ntau -20 degree). Qhov nruab nrab cuam tshuam lub zog tsis tsawg dua 34 J, kom ntseeg tau tias nws tsis tawg brittlely nyob rau hauv kev cuam tshuam load.
Q345R puas tuaj yeem siv rau qhov kub thiab txias?
Q345R tuaj yeem siv rau ntawm qhov kub qis kom tsim nyog, feem ntau nqes mus rau -20℃. Rau qhov kub thiab txias ib puag ncig, nws yuav tsum dhau qhov kev ntsuas kub qis kom paub meej tias nws cov tawv nqaij ua tau raws li qhov yuav tsum tau ua.
Yuav tshuaj xyuas qhov zoo ntawm Q345R steel daim hlau li cas?
Kev tshuaj xyuas zoo ntawm Q345R suav nrog tshuaj lom neeg kev tshuaj ntsuam xyuas, kev ntsuas cov cuab yeej cuab yeej (tensile, yield, cuam tshuam), kuaj ultrasonic flaw, tshuaj xyuas qhov zoo, thiab lwm yam, kom ntseeg tau tias nws ua tau raws li tus qauv yuav tsum tau ua.
Qhov ceev ntawm Q345R yog dab tsi?
Qhov ceev ntawm Q345R yog li 7.85 g / cm³, tib yam li cov pa roj carbon zoo tib yam. Tus nqi ntom ntom no yog siv dav hauv kev xam qhov hnyav thiab kev tsim qauv ntawm cov hlab ntsha siab thiab cov khoom muaj feem xyuam.
Kev kho cua sov dab tsi yog Q345R feem ntau raug rau?
Q345R feem ntau raug rau normalizing kev kho cua sov. Cov txheej txheem no refines lub grain qauv, txhim kho cov hlau lub toughness thiab lub zog, thiab xyuas kom meej stability ntawm nws txhua yam khoom.
Dab tsi yog qhov tsawg kawg nkaus tawm lub zog ntawm Q345R?
Qhov tsawg kawg nkaus yield zog ntawm Q345R yog 345 MPa (megapascals), uas yog qhov tseem ceeb Performance index uas txhais nws qib. Lub zog no ua kom nws tuaj yeem tiv taus siab thiab thauj khoom hauv kev siv lub nkoj siab.
Daim ntawv thov Scope ntawm Q345R yog dab tsi?
Q345R feem ntau yog siv los ua cov hlab ntsha siab xws li boilers, chav nruas, liquefied gas tanks, thiab tshuaj reactors. Nws yog qhov tsim nyog rau kev ua haujlwm ib puag ncig nrog nruab nrab thiab qis kub thiab siab siab.
Puas yog Q345R weldable?
Yog lawm, Q345R muaj weldability zoo heev. Nws tuaj yeem welded los ntawm ntau txoj hauv kev xws li phau ntawv arc vuam, roj hlau arc vuam thiab submerged arc vuam yam tsis muaj qhov tshwj xeeb preheating.
Dab tsi yog lub zog tensile ntau ntawm Q345R?
Lub zog tensile ntawm Q345R yog li ntawm 470 MPa txog 630 MPa. Qhov ntau yam no qhia txog cov hlau muaj peev xwm tiv thaiv kev sib tsoo hauv qhov nro, ua rau nws haum rau siab -cov kabmob.