Lub vuam electrode yog ib qho tseem ceeb ntawm cov txheej txheem vuam. Nws yog cov khoom siv muab tub lim uas siv los txuas ob lossis ntau daim hlau ua ke. Cov electrode feem ntau muaj cov tub ntxhais hlau hlau ncig los ntawm cov txheej txheem flux.
Cov hlau tub ntxhais hlau ua haujlwm tseem ceeb ntawm cov khoom siv hlau. Nws melts thaum lub sij hawm vuam ua hauj lwm thiab sau qhov sib txawv ntawm lub hauv paus hlau tau koom nrog, tsim kom muaj kev sib koom ua ke muaj zog thiab txuas ntxiv. Qhov sib xyaw ntawm cov tub ntxhais hlau tuaj yeem sib txawv nyob ntawm seb qhov tshwj xeeb vuam daim ntawv thov thiab hom hlau raug welded. Piv txwv li, rau vuam me me hlau, ib tug carbon steel electrode core hlau yuav siv tau, thaum vuam stainless hlau, ib tug electrode nrog ib tug stainless hlau core yog yuav tsum tau.
Flux txheej ntawm vuam electrode muaj ntau yam haujlwm tseem ceeb. Ua ntej, nws pab tiv thaiv lub pas dej molten weld los ntawm atmospheric paug. Raws li cov electrode melts, cov flux melts thiab tsim ib tug gaseous shield nyob ib ncig ntawm lub weld cheeb tsam, tiv thaiv cov pa oxygen, nitrogen, thiab lwm yam gases los ntawm reacting nrog cov hlau molten thiab ua rau tsis xws luag xws li porosity los yog embrittlement. Qhov thib ob, lub flux kuj tuaj yeem ua tus deoxidizer, tshem tawm cov impurities ntawm cov hlau vuam thiab txhim kho nws qhov zoo. Tsis tas li ntawd, cov txheej txheej flux tuaj yeem cuam tshuam cov yam ntxwv ntawm arc, xws li nws qhov ruaj khov thiab nkag mus. Nws tseem tuaj yeem cuam tshuam rau cov duab thiab cov tsos ntawm cov hlaws weld.
Muaj ntau hom vuam electrodes muaj, txhua tus tsim los rau cov txheej txheem vuam tshwj xeeb thiab cov hlau sib txuas. Piv txwv li, nyob rau hauv shielded hlau arc vuam (SMAW), feem ntau hu ua stick welding, ib tug ntau yam ntawm electrodes yog siv los tuav ntau lub hauv paus hlau thiab vuam txoj hauj lwm. Qee cov electrodes yog tsim los rau vuam nyob rau hauv txoj hauj lwm tiaj tus, thaum lwm tus yog haum rau ntsug los yog nyiaj siv ua haujlwm vuam.
