Nyob rau hauv offshore structural fabrication, vuam ntawmS690 siab -lub zog steelfeem ntau yog ua los ntawm kev saib xyuas ntawm cov koom haum loj xws li DNV, Lloyd's Register, Bureau Veritas, thiab ABS.
Cov koom haum no tau tsim cov txheej txheem kev cai dav dav nrog cov txheej txheem kev ua haujlwm yam tsawg kawg nkaus kom ntseeg tau cov qauv kev ncaj ncees thiab kev nyab xeeb ntawm kev ua haujlwm hauv thaj chaw hnyav marine.
Txawm hais tias cov kev cai tseem ceeb uas tau teev tseg los ntawm cov kev faib tawm no feem ntau sib haum xeeb, ua kom tau raws li qhov tiag -kev tsim khoom hauv ntiaj teb xav tau kev siv vuam ntau, kev tswj cov txheej txheem nruj, thiab kev xaiv cov khoom siv tsim nyog-tshwj xeeb tshaj yog rau S690 offshore steel qauv.
Yam tsawg kawg nkaus Mechanical Requirements rau Weld Hlau
Tag nrho cov khoom siv vuam siv rau S690 steels hauv kev pabcuam sab nrauv yuav tsum ua tau raws lossis ntau dua cov khoom siv kho tshuab hauv qab no:
| Khoom | Yam tsawg kawg nkaus | Hom Offshore Expectation |
|---|---|---|
| Tensile zog | Ntau dua lossis sib npaug li 770 MPa | 770–{1}} MPa |
| Yield zog | Ntau dua lossis sib npaug li 690 MPa | Ntau dua lossis sib npaug li 690 MPa |
| Elongation | Ntau dua lossis sib npaug li 17% | 17–22% |
| Charpy V-Qhov cuam tshuam (-40 degree) | Ntau dua lossis sib npaug rau 69 J | 70–90 J |
Cov txiaj ntsig no yog qhov tseem ceeb los xyuas kom muaj kev thauj khoom txaus- cov kabmob muaj peev xwm, tawg tsis kam, thiab toughness nyob rau hauv qis - qhov kub thiab txias ntawm ntug dej hiav txwv.
Vuam Consumable Solutions rau S690 Steel
Rutile Flux-Cored Hlau - CEWELD AA R690
CEWELD AA R690 yog seamless rutile flux -cored hlau tshwj xeeb tsim rau S690 thiab HY100 offshore steels. Flux- cov xov hlau cored tau dav nyiam los ntawm cov vuam vim lawv cov yam ntxwv ruaj khov arc thiab dav dav hloov pauv ntau yam.
Cov yam ntxwv tseem ceeb:
Zoo arc stability thiab du hlau hloov
Qhov zoo tshaj plaws vuam tam sim no: 180-270 A
Haum rau siab -tam sim no txoj hauj lwm vuam
Yam PF txoj hauj lwm tam sim no: ~ 240 A (vs. ~ 120 A rau cov xaim hlau)
Integrated slag system txhawb ntsug thiab positional welds
Qhov no ua rau AA R690 tshwj xeeb tshaj yog tsim nyog rau cov txheej txheem sab nrauv sab nrauv uas rov tso cov khoom loj yog qhov ua tsis tau.
Hlau -Cored Hlau (MCAW) - CEWELD AA M690
CEWELD AA M690 yog hlau seamless -cored vuam hlau tsim rau S690 siab- lub zog offshore steels. Qhov zoo tshaj plaws ntawm cov hlau -cored hlau yog nyob rau hauv nws superior deposition efficiency.
Technical zoo:
10-20% ntau dua deposition tus nqi piv rau cov khoom hlau
Txhim kho tam sim no ceev vim yooj yim melting hlau hmoov
Txhim kho weld pas dej ua yeeb yam
Ua kom muaj kev mus ncig siab dua
Yooj yim tswj T8 / 5 lub sij hawm txias, uas yog qhov tseem ceeb rau kev tswj kom muaj zog hauv S690 welds
AA M690 feem ntau xaiv thaum tsim khoom thiab kev tswj xyuas cov cua sov kom zoo yog qhov tseem ceeb hauv kev tsim tawm sab nrauv.
Solid GMAW Hlau - CEWELD ER 110 Ti
Nrog rau kev nce qib ntawm niaj hnub inverter-raws li qhov chaw siv hluav taws xob thiab cov yam ntxwv ntawm kev tswj hwm arc, qhov kev ua tau zoo ntawm cov xov hlau thiab cov xov hlau cored tau nqaim.
CEWELD ER 110 Ti (ER 110 S-1) muaj:
Txhim kho arc stability los ntawm digital arc tswj
Txhim kho kev coj tus cwj pwm ntub dej piv rau cov khoom siv sib xyaw ua ke
Qhov tseem ceeb txo kev pheej hmoo ntawm kev tsis muaj - ntawm - fusion defects
Mechanical zog haum rau S690-HY100 steels
Txawm hais tias qhov kev txhim kho no, cov xaim hlau tseem tsis tshua muaj nyob rau hauv kev sib tsoo ntawm ntug dej vim muaj kev txwv kev pom zoo thiab cov teeb meem ntawm txoj haujlwm vuam.
Kev sib piv ntawm Vuam Hlau Hom rau S690 Offshore Steel
| Hom hlau | Deposition Rate | Positional Vuam | Arc Stability | Offshore Kev Pom Zoo | Hom kev siv |
| Flux-Cored (FCAW) | Siab heev | Zoo heev | Zoo heev | Pom zoo dav dav (DNV/LR) | ~ 95% offshore vuam |
| Hlau -Cored (MCAW) | Siab (+10–20%) | Zoo | Zoo heev | Pom zoo | Productivity- tsom |
| Solid Wire (GMAW) | Nruab nrab | txwv | Zoo (digital arc) | txwv | Tswj ib puag ncig |
Vim li cas Flux-Cored Hlau Dominates Offshore S690 Vuam (≈95%)
Flux-cored welding hlau tseem yog qhov kev xaiv zoo tshaj plaws rau offshore S690 steel fabrication vim yog cov hauv qab no:
Cov qauv loj hauv ntug dej hiav txwv yog qhov nyuaj lossis tsis tuaj yeem tig mus rau hauv nqes - tes vuam txoj haujlwm
Offshore zoo thiab toughness yuav tsum tau xav tau thiab tsis yooj yim kom ua tau raws li cov khoom siv hlau
Flux- cov xov hlau cored qhia tsawg dua kev sib txuas thiab fusion tsis xws luag
Feem ntau cov xov hlau tsis muaj kev pom zoo sab nraud (DNV, Lloyd's, thiab lwm yam)
Kev tsim khoom siab dua:
Txog li 200% deposition efficiency nyob rau hauv positional vuam
~ 120% efficiency nyob rau hauv down{1}} tes vuam
Kev txhim kho arc tus cwj pwm nce welder lub voj voog ua haujlwm ntau dua lossis sib npaug li 5%, txo qis qaug zog thiab rov ua haujlwm dua
Rau kev tsim kho sab nrauv uas muaj S690 siab-lub zog steel, flux-cored thiab hlau-cored vuam consumables muab qhov zoo sib npaug ntawm cov khoom siv ua haujlwm, tawv, tsim khoom, thiab ua raws li kev faib tawm hauv zej zog.
Thaum cov xov hlau ruaj khov tau txhim kho nrog cov thev naus laus zis thev naus laus zis, flux- cov xov hlau cored tseem yog tus qauv kev lag luam rau sab nrauv S690 vuam vim lawv txoj haujlwm zoo tshaj plaws thiab muaj pov thawj kev ntseeg tau.
Q: Kev tswj cua sov yog qhov tseem ceeb thaum vuam S690 steel.
A: Vim tias S690 hlau tau muab rau hauv qhov kub thiab txias, cov cua kub ntau dhau thaum lub vuam tuaj yeem ua rau cov cua sov ua kom sov- thaj tsam cuam tshuam (HAZ).
Yog tias tsis tswj xyuas kom zoo, qhov softening no yuav txo tau cov txiaj ntsig zoo nyob ze ntawm qhov vuam, ua rau cov kev xav ntawm tus qauv tsim. Yog li ntawd, kev txwv nruj ntawm cov khoom siv hluav taws xob, kev sib tshuam ntawm qhov kub thiab txias yog feem ntau teev nyob rau hauv cov txheej txheem vuam.
Q: Hydrogen-induced cracking yog ib qho kev pheej hmoo tseem ceeb hauv S690 vuam.
A: Txawm hais tias S690 muaj cov ntsiab lus ntawm cov pa roj carbon tsawg, nws cov qib siab muaj zog ua rau muaj kev cuam tshuam rau hydrogen - pab txhawm rau txhawm rau txias. Txhawm rau txo qhov kev pheej hmoo no, qis - cov khoom siv hluav taws xob siv hluav taws xob yog qhov yuav tsum tau ua, thiab kev ua kom sov ua ntej yuav tsum tau nyob ntawm lub phaj thickness, kev sib koom ua ke, thiab cov xwm txheej puag ncig. Hauv offshore thiab hnyav- cov qauv ua haujlwm, kev tswj hwm hydrogen feem ntau yog qhov tseem ceeb tshaj qhov ntsuas kub ua ntej ib leeg.
Q: S690QL thiab S690QL1 sib txawv tsuas yog nyob rau hauv qis -kub qhov yuav tsum tau muaj.
A: Qhov sib txawv tseem ceeb ntawm S690QL thiab S690QL1 yog nyob rau hauv lawv Charpy V-qhov ntsuas qhov ntsuas kub. S690QL feem ntau yuav tsum muaj kev ntsuam xyuas cuam tshuam ntawm −40 degree, thaum S690QL1 raug kuaj ntawm −60 degree.
Qhov no ua rau S690QL1 zoo dua rau arctic, offshore, lossis txias - daim ntawv thov hauv cheeb tsam, qhov twg tawg toughness ntawm qis kub yog qhov tseem ceeb ntawm kev tsim qauv.
Q: Siv S690 tso cai rau kev txo qhov hnyav tab sis ua rau muaj kev qhuab qhia ntau ntxiv.
A: Los ntawm kev tsim qauv tsim, S690 ua rau cov phaj tuab tuab thiab qhov hnyav tag nrho piv nrog S355 lossis S460 steels. Txawm li cas los xij, cov nyiaj khaws cia no tau los ntawm tus nqi ntawm kev tswj xyuas nruj dua.
Cov txheej txheem vuam, qib tshuaj xyuas, thiab cov neeg ua haujlwm tsim nyog feem ntau yuav tsum tau hloov kho kom paub meej cov txiaj ntsig ntawm siab - lub zog steel yam tsis muaj kev cuam tshuam txog kev nyab xeeb.
