1.Kev xaiv cov khoom siv thiab kev tsim vuam yog ua raws li ASME Boiler thiab Pressure Vessel Code thiab ANSI Pressure Pipeline Code.
2. Cov tshuaj lom neeg muaj pes tsawg leeg ntawm cov hlau ntawm cov khoom siv welded thiab cov khoom siv welded yuav tsum ua raws li cov kev cai ntawm tus qauv.Cov khoom siv hauv paus yuav tsum ua raws li ASTM cov kev cai ntawm cov khoom muaj feem xyuam B165, B164, B127.Cov khoom siv muab tub lim yuav tsum ua raws li ASME A-42 muab tub lim cov khoom siv rau ER-NiCu-7 lossis ER-ENiCu-4.
3. Lub weld bevel thiab qhov chaw nyob ib puag ncig ntawm qhov stain (roj ester, roj zaj duab xis, xeb, thiab lwm yam) yuav tsum tau ntxuav nrog tshuaj ntxuav.
4. Thaum qhov kub ntawm cov khoom siv hauv paus tsawg dua 0 ℃, nws yuav tsum tau preheat rau 15.6-21 ℃, thiab weld bevel ntawm cov khoom yog rhuab mus rau 16-21 ℃ hauv 75 hli.
5. Lub weld bevel prefabricated mas nyob ntawm qhov vuam txoj hauj lwm thiab cov thickness ntawm cov khoom, Monel alloy yuav tsum tau lub bevel lub kaum sab xis ntawm lub weld dua lwm yam ntaub ntawv, lub blunt ntug tshaj lwm yam ntaub ntawv yuav tsum me me, rau lub monel alloy phaj thickness ntawm 3.2. -19mm, lub kaum sab xis yog 40 ° lub kaum sab xis nrog lub ntsej muag blunt 1.6mm, lub hauv paus qhov sib txawv ntawm 2.4mm, tsawg dua 3.2mm weld ntawm ob sab kom tau squarely txiav los yog me ntsis txiav bevel, tsis txiav bevel.Cov sab vuam yog thawj zaug los ntawm kev siv tshuab, lossis lwm txoj kev tsim nyog, xws li arc gas planing lossis plasma txiav, arc txiav.Tsis hais txog ntawm txoj kev, sab ntawm lub vuam yuav tsum zoo ib yam, du thiab tsis muaj burr-dawb, lub bevel yuav tsum tsis txhob muaj slag, xeb thiab teeb meem impurities, yog tias muaj kab nrib pleb thiab lwm yam tsis xws luag yuav tsum tau polished thiab ua tib zoo xyuas ua ntej welding. .
6. Cov kev cai ntawm niam txiv cov ntaub ntawv phaj thickness, cov ntaub ntawv pom zoo thickness (4-23mm) mus txog 19mm tso cai weld, lwm yam thicknesses kuj yuav welded tab sis yuav tsum tau qhov txuas ntawm cov ncauj lus kom ntxaws sketch.
7. Vuam ua ntej vuam pas nrig rau kev kho kom qhuav, ziab kom qhuav ntawm 230 - 261 C.
8. Welding tej yam kev mob: qhov saum npoo ntawm cov welded qhov chaw tsis tuaj yeem welded vim los nag thiab noo noo, hnub los nag, hnub cua daj cua dub tsis tuaj yeem qhib cua vuam, tshwj tsis yog teeb tsa lub tsev tiv thaiv.
9. Tsis tas yuav tsum tau kho cua sov tom qab vuam.
10. Feem ntau ntawm cov tshuab vuam yog nrog cov hlau arc vuam (SMAW), kuj tuaj yeem siv cov roj shielded tungsten arc vuam (GTAW), tsis siv neeg vuam yogtsis pom zoo.Yog tias siv vuam tsis siv neeg, ces argon arc vuam, kev siv vuam pas nrig tsis viav vias vuam txheej txheem, txhawm rau ua kom cov vuam hlau fluidity ua tau zoo, tuaj yeem ua viav vias me ntsis los pab qhov ntws ntawm vuam hlau, tab sis qhov siab tshaj plaws viav vias dav. tsis pub tshaj ob npaug ntawm txoj kab uas hla ntawm vuam pas nrig, ntawm kev siv SMAW txoj kev vuam yooj yimTsis muaj: Fais fab mov: ncaj qha, rov qab kev twb kev txuas, tsis ua hauj lwm Voltage: 18-20VCurrent: 50 - 60AElectrode: feem ntau φ2.4mm ENiCu-4 (Monel 190) electrode
11. Spot vuam yuav tsum tau fused nyob rau hauv lub hauv paus ntawm weld channel.
12. Tom qab lub vuam yog tsim, tsis muaj ntug raug tso cai nyob.
13. Lub pob tw weld yuav tsum tau ntxiv dag zog, qhov qhov siab qhov siab yuav tsum tsis pub tsawg tshaj 1.6mm thiab tsis ntau tshaj 3.2mm, qhov projection yuav tsum tsis txhob ntau tshaj 3.2mm, thiab tsis ntau tshaj 3.2mm ntawm cov yeeb nkab bevel.
14. Tom qab welding txhua txheej ntawm lub vuam, yuav tsum tau weld flux thiab adhesion nrog stainless hlau hlau txhuam kom tshem tawm huv, ua ntej welding txheej tom ntej.
15. Kev kho qhov tsis xws luag: Thaum qhov zoo ntawm qhov teeb meem weld, daim ntawv thov kev sib tsoo thiab txiav los yog arc roj yuav raug khawb tawm qhov tsis xws luag kom txog rau thaum cov xim hlau qub, thiab tom qab ntawd rov welded raws li cov txheej txheem vuam thawj thiab cov kev cai, tsis txhob tso cai rau txoj kev hammering los kaw lub vuam hlau kab noj hniav los yog sau cov kab noj hniav nrog cov khoom txawv teb chaws.
16. Carbon steel overlay welding Monel alloy yuav tsum siv p2.4mm vuam pas nrig, vim tias cov welded Monel alloy txheej yuav tsum muaj tsawg kawg yog 5 hli tuab, txhawm rau kom tsis txhob tawg, yuav tsum muab faib ua yam tsawg kawg yog ob txheej vuam.Thawj txheej yog txheej hloov ntawm Monel alloy tov nrog carbon steel.Cov txheej thib ob saum toj no cov ntshiab Monel alloy txheej, tom qab ua tiav kom ntseeg tau tias muaj cov ntshiab Monel alloy zoo tuab txheej ntawm 3.2 hli, txhua txheej txheej welded kom txias rau chav sov, nrog cov hlau tsis xeb hlau txhuam kom tshem tawm cov vuam flux ua ntej vuam. ntawm ib txheej.
17. Thickness ntau dua 6.35 hli ntawm Monel alloy phaj, taub qab vuam yuav tsum tau muab faib ua plaub los yog ntau tshaj txheej ntawm vuam.Thawj peb txheej muaj zoo vuam pas nrig (φ2.4mm) vuam, ob peb txheej kawg muaj coarse vuam pas nrig (φ3.2mm) vuam.
18. Monel alloy welding ntawm AWS ENiCu-4 vuam pas nrig ER NiCu-7 hlau, carbon steel thiab Monel alloy vuam nrog EN NiCu-1 los yog EN iCu-2 vuam pas nrig lwm cov kev cai thiab tib yam li cov nqe lus saum toj no.
kev tswj kom zoo
Los xyuas kom meej qhov zoo ntawm vuam, tsis yog-tshuaj ntsuam xyuas txoj kev tshuaj ntsuam xyuas txhais tau tias tswj qhov zoo, xws li hluav taws xob, sib nqus particle, ultrasonic, nkag mus thiab lwm yam kev soj ntsuam txhais tau tias rau kev soj ntsuam.Tag nrho cov welds tseem yuav tsum tau soj ntsuam xyuas qhov tsis xws luag, xws li cov kab nrib pleb, tom, kev sib dhos thiab vuam nkag, thiab lwm yam. Nyob rau tib lub sijhawm, hom vuam, vuam sib sau yuav tsum tau kuaj xyuas.Tag nrho cov hauv paus welds yuav tsum raug tshuaj xyuas kom muaj xim, thiab yog tias pom muaj qhov tsis xws luag, lawv yuav tsum tau rov ua dua ua ntej qhov seem welds raug tshuaj xyuas.
Post lub sij hawm: Feb-13-2023