Lub electrode yog ib txoj hlau hlau coated thiab feem ntau yuav tsum tau ua los ntawm cov khoom zoo sib xws hauv cov khoom thiab cov khoom sib xyaw rau cov hlau uas raug welded, thiab muaj ntau yam tseem ceeb uas mus rau hauv kev xaiv lub electrode zoo rau koj qhov project tshwj xeeb.
Txawm hais tias cov hlau shielded metal arc welding (SMAW) lossis "stick" electrodes yog cov khoom siv tau thiab dhau los ua ib feem ntawm qhov vuam, lwm cov electrodes (xws li cov uas siv rau TIG welding) tsis yog cov khoom siv tau, txhais tau tias lawv tsis yaj thiab dhau los ua ib feem ntawm qhov vuam. seam. Kev sib cais ntawm cov seam, hauv cov xwm txheej no, kev siv electrode yog qhov yuav tsum tau ua.
Peb ntawm Eng-weld paub tias kev xaiv lub electrode zoo yog qhov tseem ceeb rau lub zog vuam, qhov zoo ntawm vuam, txo qhov spatter thiab kev ntxuav.
Cov hluav taws xob cellulose yog cov hluav taws xob vuam uas tau coated nrog lub sheath uas muaj cov khoom siv organic. Feem ntau kwv yees li 30% ntawm qhov hnyav ntawm cov txheej yog cellulose, tab sis nyob rau hauv qee qhov chaw ntawm lub ntiaj teb cellulose thiab hmoov ntoo yuav raug ntxiv rau hauv cov txheej kom txo cov cellulose ntshiab.
Cov organic compounds sib txawv hauv cov electrodes yuav lwj hauv lub arc los ua carbon dioxide, carbon monoxide thiab hydrogen, tag nrho cov no ua rau lub voltage hauv lub arc nce ntxiv, ua rau lub arc muaj zog dua thiab nyuaj dua. Yog li, cov electrodes cellulose tuaj yeem nkag mus tob txog li 70% dua li cov electrodes sib xws nrog tib qhov ntsuas tam sim no.
Feem ntau yog tsim los ntawm cov txheej nyias lossis nruab nrab, txawm hais tias qhov no tsim cov slag uas tuaj yeem tshem tawm tom qab ua tiav cov txheej txheem vuam, qhov no tuaj yeem ua rau muaj kev poob ntau heev. Txawm li cas los xij, lub peev xwm vuam ntsug thiab lub peev xwm nkag mus ntawm lub electrode no zoo heev vim muaj qhov sib txawv hauv cov txheej txheem.
Lub electrode hydrogen qis yog qhov tseem ceeb ntawm kev vuam siv roj shielded arc (SMAW) uas muaj cov dej tsawg dua 0.6% piv rau cov electrodes cellulosic uas muaj 4-6% dej ib txwm muaj.
Feem ntau, cov electrodes hydrogen qis xws li E7018 rod electrode muab cov neeg siv nrog cov spatter tsawg thiab lub arc du, ruaj khov thiab ntsiag to. Cov yam ntxwv no ua rau cov electrodes no yog qhov kev xaiv zoo rau cov neeg paub txog kev vuam thiab cov neeg pib tshiab. Cov yam ntxwv ntawm cov hlau filler electrodes no muab rau tus neeg vuam nrog kev tswj hwm arc zoo thiab txo qhov xav tau kev ntxuav tom qab vuam.
Tsis zoo li lwm cov electrodes xws li E6010 lossis E6011, cov electrodes hydrogen qis muab cov nqi tso tawm thiab nkag mus zoo dua, tso cai rau tus welder ntxiv ntau hlau rau qhov sib koom ua ke txhua lub sijhawm, txhim kho lub zog weld thiab zam kev puas tsuaj ntawm kev vuam xws li tsis nkag mus.
Feem ntau, cov electrodes hlau tsis hnyav muab lub arc ntsiag to thiab ruaj khov nrog kev nkag mus tsawg, ua rau lawv zoo tagnrho rau kev sib txuas dav dav thiab daim ntawv thov nyias. Txawm li cas los xij, muaj ntau hom electrodes hlau tsis hnyav, txhua tus muaj cov yam ntxwv sib txawv me ntsis thiab yog li ntawd zoo dua rau kev siv sib txawv.
Piv txwv li, qib 6013 yog cov hlau electrode uas siv dav dav uas muab kev nkag mus tob thaum tswj hwm qhov arc du thiab ruaj khov. Lub arc yooj yim rov ua dua tshiab, cov xov vuam zoo nkauj, cov spatter tsawg dua, cov slag yooj yim tswj, tsim nyog rau kev vuam ntsug.
Lub 7018 arc electrode, ntawm qhov tod tes, yog lub electrode hlau tsis muaj zog uas tsim los rau kev vuam cov khoom siv carbon steel muaj zog heev. Lub electrode no feem ntau siv rau kev vuam cov qauv vim yog qhov tsis kam ntawm qhov vuam. Tab sis qhov no tsim ntau cov slag, uas tsis haum rau kev vuam ntsug.
Lub electrode hlau mos kawg uas peb yuav pom yog 6011. Lub electrode no muaj peev xwm nkag mus tob thiab du thaum vuam cov hlau mos galvanized thiab lwm cov hlau tsis sib xyaw. Nws cov txheej txheej tsim kom muaj lub arc muaj zog ntawm kev nkag mus tob, thiab cov txheej slag yog nyias thiab yooj yim tshem tawm.
Ib yam li lwm cov electrodes uas peb tau pom saum toj no, cov electrodes hlau tsis xeb muaj ntau hom, txhua tus txawv me ntsis ntawm qhov dhau los.
Nov peb saib 3 qib sib txawv ntawm cov hlau tsis xeb electrodes, 308, 309 thiab 316, thiab thaum twg yuav siv lawv.
Yog tias koj siv cov qib 301, 302, 304, 305 thiab cov hlau casting CF-3 thiab CF8, ces peb xav kom koj siv 308L, suav nrog ER308LSi electrodes. Cov electrodes hlau tsis xeb no zoo tagnrho rau cov hlau tsis xeb austenitic, tab sis rau cov ntawv thov xws li kev tsim hluav taws xob, peb xav kom siv 308H electrode vim tias cov electrode carbon siab no muab kev tiv thaiv zoo dua ntawm qhov kub siab.
Thaum koom cov hlau tsis muaj zog lossis cov hlau tsis muaj zog rau cov hlau tsis muaj zog, siv 309L, suav nrog ER309LSi. Tib yam siv rau kev koom cov hlau tsis muaj zog sib txawv xws li 409 lossis 304L hlau tsis muaj zog. Ntxiv rau qhov no, lawv kuj yuav tsum tau siv los txuas 309 cov hlau tseem ceeb.
Thaum siv cov hlau tseem ceeb 316L thiab 316 thiab lawv cov khoom sib npaug CF-8m thiab CF-3M, tsuas yog 316L yuav tsum tau siv ua cov hlau ntim, suav nrog ER317LSi.
Qee daim ntawv thov 308L tuaj yeem hloov 309L ua cov hlau ntim vim lawv tsis xav tau molybdenum tsis zoo li 316 lossis 316L daim ntawv thov uas xav tau molybdenum yog li koj tsis tuaj yeem hloov 309 nrog 316.
Raws li peb tau pom saum toj no, muaj ntau yam electrodes muaj. Txhua tus ntawm lawv muaj cov yam ntxwv sib txawv me ntsis thiab yog li ntawd txawv me ntsis thiab tshwj xeeb. Thaum ua txhua yam kev kho thiab txij nkawm, yuav tsum tau ceev faj kom ntseeg tau tias cov electrodes siv muaj cov yam ntxwv xav tau.
Ua ntej, txiav txim siab seb koj yuav kho lossis kho hom hlau twg. Tom qab ntawd koj yuav tsum txiav txim siab seb koj puas xav tau lub electrode dav dav lossis lub electrode uas muaj cov yam ntxwv tshwj xeeb. Thaum koj muaj tag nrho cov ntaub ntawv no koj tuaj yeem pib soldering, yog tias koj tsis ua thiab siv cov electrodes tsis raug koj lub soldering yuav tsis ua haujlwm lossis koj tsuas yog hlawv cov hlau uas koj ua haujlwm nrog.
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