S690Qyog lub zog siab -yield zog, quenched thiab tempered (Q + T) structural steel qib (EN 10025-6) paub txog nws lub zog tshwj xeeb, toughness, thiab qaug zog tsis kam, featuring qhov tsawg kawg nkaus tawm lub zog ntawm 690 MPa, ua rau nws zoo tagnrho rau hnyav - cov khoom siv cranes, cov dej num thiab cov dej num zoo lub zog- rau qhov hnyav piv yog qhov tseem ceeb rau kev nyab xeeb thiab kev ua haujlwm.
Cov tshuaj muaj pes tsawg leeg ntawm S690Q steel raws li EN 10025-6,%
|
С |
Si |
Mn |
P |
S |
N |
B |
Cr |
Cu |
Mo |
Nb |
Ni |
Ti |
V |
Zr |
|
0,20 |
0,80 |
1,70 |
0,025 |
0,015 |
0,015 |
0,005 |
1,50 |
0,50 |
0,70 |
0,06 |
2,0 |
0,05 |
0,12 |
0,15 |
Mechanical zog ntawm S690Q steel
|
Nominal ntsuas, mm |
Yam tsawg kawg nkaus tawm lub zog, ReH (MPa) |
Qhov kawg tensile zog, Rm (MPa) |
Qhov tsawg kawg nkaus elongation ratio σ,% |
Brinell hardness tooj, HB (MPa) |
|
>3 Tsawg dua lossis sib npaug li 50 |
690 |
770-940 |
14 |
228-278 |
|
>50 Tsawg dua los yog sib npaug rau 100 |
650 |
760-930 |
14 |
225-276 |
|
>100 Tsawg dua los yog sib npaug rau 150 |
630 |
710-900 |
14 |
210-266 |
Analogues rau S690Q steel
|
Lub teb chaws Yelemees (DIN) |
SWB 690V |
|
Fabkis (AFNOR) |
E690T |
Kev ua haujlwm
1. Ua ntej-Kev Ua Haujlwm & Txiav
Vim tias S690Q yog rhiab heev rau cov cua kub, txoj kev txiav yuav tsum txo qis thermal deformation thiab qhov loj ntawm cov cua sov- cuam tshuam cheeb tsam (HAZ).
Txoj kev:
Laser & Plasma Txiav: Txaus siab rau qhov siab precision thiab me HAZ.
Oxy-fuel Cutting: Often used for thicker plates (typically >50mm), txawm hais tias nws tsim HAZ loj dua thiab tej zaum yuav xav tau ntug trimming.
Ntug Kev Npaj: Beveling (V, X, los yog K-zoo li tus) yog qhov tseem ceeb rau tag nrho -kev nkag mus vuam. Cov npoo yuav tsum tau ntxuav ntawm xeb, nplai, thiab roj yam tsawg 25-50 hli los ntawm kev sib koom ua ke.
2. Txias & Kub sib sau
Cold forming: S690Q yog tsim rau txias khoov thiab dov; Txawm li cas los xij, vim nws lub zog siab, cov xovxwm ntau dua thiab ntau dua springback yuav tsum suav rau.
Kub Txoj Kev: Feem ntau poob siab saum qhov kub thiab txias (feem ntau yog 530℃-600 degree) vim nws tuaj yeem txo cov khoom siv lub zog mus tas li.
3. Vuam txheej txheem
Vuam yog lub sijhawm tseem ceeb tshaj plaws uas cov khoom siv tuaj yeem cuam tshuam yog tias tsis muaj kev tswj xyuas cov cua sov.
Preheating: Tsim nyog rau cov ntu tuab los tiv thaiv hydrogen-induced cracking.
6-20 hli: 75-100 degree
20-50 hli: 100-150 degree
Thaum tshav kub kub input: yuav tsum tau khaws cia rau qhov tsawg kawg nkaus (feem ntau txwv rau ~ 4 kJ / cm) los tiv thaiv cov qoob loo loj hlob hauv HAZ.
Consumables: Siv tsawg-hydrogen muab tub lim hlau (piv txwv li, AWS E11018-G) uas phim los yog me ntsis tshaj lub hauv paus hlau lub zog.
4. Tshaj tawm -Kev Ua Haujlwm & Kev Tshuaj Xyuas
Tshaj tawm -Kev kho cua sov (PWHT): S690Q feem ntau tsis xav tau PWHT. Yog tias muaj kev ntxhov siab- nyem annealing yog yuav tsum tau rau kev tsim kho, nws yuav tsum tau ua 30-40℃qis dua qhov qub tempering kub (feem ntau nyob rau hauv 530-580℃ntau) kom tsis txhob poob lub zog.
Kev tshuaj xyuas (NDT): Tsis yog- kuaj kev puas tsuaj (Ultrasonic, Sib Nqus Particle, lossis Radiographic) yuav tsum tau kuaj xyuas qhov chaw lossis cov kab nrib pleb, tshwj xeeb tshaj yog nyob ze HAZ.
daim ntawv thov
• Cov cuab yeej nqa hnyav:
S690Q feem ntau yog siv rau hauv kev tsim cov cranes, mobile nqa platforms, thiab hydraulic nqa caj npab. Nws lub zog tawm los siab tso cai rau kev tsim qauv sib dua, muaj txiaj ntsig zoo dua yam tsis muaj kev cuam tshuam lub peev xwm thauj khoom, ua rau nws zoo tagnrho rau cov khoom siv uas yuav tsum tau ua kom hnyav hnyav thaum tswj kev ua haujlwm.
• High-rise thiab loj-span tsev:
Hauv kev tsim kho kev lag luam, S690Q yog siv rau cov txheej txheem tseem ceeb xws li kab, kab teeb, thiab trusses hauv cov tsev siab thiab cov qauv loj. Nws muaj peev xwm tiv taus cov khoom hnyav thiab tiv thaiv deformation pab txhim kho kev ruaj ntseg thiab kev nyab xeeb ntawm cov tsev niaj hnub, tshwj xeeb tshaj yog nyob rau thaj tsam seismic.
• Offshore thiab marine qauv:
Vim nws zoo toughness thiab tsis kam mus rau hnyav ib puag ncig tej yam kev mob, S690Q yog ua hauj lwm nyob rau hauv offshore platforms, kev them nyiaj yug qauv, thiab marine khoom. Nws muab kev txhim khu kev qha nyob rau hauv kev ntxhov siab thiab corrosive marine ib puag ncig, ua rau muaj kev ncaj ncees ntawm cov khoom siv sab nrauv.
• Mining thiab siv tshuab:
S690Q yog siv los tsim cov tshuab hnyav xws li excavator booms, bulldozer hniav, thiab cov khoom siv tsheb mining. Nws qhov kev sib xyaw ua ke ntawm lub zog thiab kev ua kom tawv nqaij pab cov tshuab no tiv taus cov khoom siv abrasive thiab kev cuam tshuam loj heev ntawm cov mining thiab cov chaw tsim kho.
• Cov qauv choj:
Rau cov txuas hniav uas yuav tsum tau muaj peev xwm thauj khoom siab thiab ua haujlwm ntev, S690Q yog siv rau hauv qhov tseem ceeb xws li choj girders thiab cov tswv cuab txhawb nqa. Nws lub zog siab tso cai rau txo cov khoom tuab, ua rau muaj kev lag luam ntau dua thiab siv tau zoo.
Tag nrho cov specification thiab cov ntsiab lus muaj nyob rau ntawm kev thov. Cov ntaub ntawv saum toj no yog muab rau kev taw qhia nkaus xwb. Rau kev tsim tshwj xeeb thov hu rau peb cov neeg ua haujlwm muag khoom.
Dab tsi yog microstructure ntawm S690Q?
S690Q muaj tempered martensitic microstructure. Cov qauv no yog tsim los ntawm quenching thiab tempering, muab nws lub zog siab thiab toughness.
Dab tsi yog cov thickness ntau ntawm S690Q daim hlau?
S690Q daim hlau feem ntau muaj nyob rau hauv thicknesses ntawm 3 hli mus rau 150 hli. Cov phaj tuab dua yuav xav tau kev kho cua sov kho kom zoo ib yam.
Qhov siab tshaj plaws ua haujlwm kub rau S690Q yog dab tsi?
Qhov siab tshaj plaws kev nyab xeeb kev khiav hauj lwm kub rau S690Q yog nyob ib ncig ntawm 200 degree. Tshaj li qhov no, nws cov khoom siv kho tshuab yuav maj mam degrade.
S690Q puas tuaj yeem siv rau hauv qhov chaw qis - qhov kub thiab txias?
Yog lawm. S690Q muaj qhov zoo qis- qhov kub thiab txias, nrog qhov ntsuas qhov ntsuas qhov tsawg kawg nkaus ntawm -20℃(rau Q qib), haum rau cov cheeb tsam txias.
Dab tsi yog cov ntsiab lus alloying tseem ceeb hauv S690Q?
Cov ntsiab lus tseem ceeb hauv S690Q suav nrog carbon, manganese, chromium, molybdenum, thiab nickel. Lawv txhim khu lub zog, toughness, thiab hardenability.
S690Q cua sov- kho li cas?
S690Q dhau quenching (ceev txias los ntawm austenitizing kub) ua raws li tempering. Cov txheej txheem no optimizes nws lub zog thiab ductility.
Yuav khaws S690Q daim hlau li cas los tiv thaiv corrosion?
Khaws S690Q daim hlau nyob rau hauv qhov chaw qhuav, zoo- qhov cua qhov chaw, kom deb ntawm cov dej noo thiab tshuaj lom neeg. Npog nrog cov ntawv tsis muaj dej kom tsis txhob xeb.
S690Q puas tuaj yeem nitrided?
Yog lawm, S690Q tuaj yeem ua nitrided los txhim kho qhov tawv tawv thiab hnav tsis kam. Cov txheej txheem no txhim kho nws cov kev ua tau zoo hauv kev hnav- cov ntawv siv yooj yim.
Dab tsi yog qhov elongation ntawm kev tawg ntawm S690Q?
Qhov tsawg kawg nkaus elongation ntawm tawg ntawm S690Q yog 14% (rau 16 hli thickness). Nws ua kom muaj ductility txaus rau kev nyab xeeb ntawm cov qauv.
Puas yog S690Q haum rau crane booms?
Yog lawm, S690Q yog qhov zoo tagnrho rau crane booms. Nws lub zog siab txo qhov hnyav thaum tswj kev thauj khoom -cov kabmob muaj peev xwm, txhim kho crane efficiency.
Dab tsi yog txoj hauv kev tshuaj xyuas rau S690Q?
Cov kev tshuaj ntsuam xyuas feem ntau suav nrog kev ntsuas tensile, kev sim cuam tshuam, kuaj hardness, kuaj ultrasonic, thiab kev tshuaj xyuas qhov muag kom zoo.