7018 electrodes yog ib qho staple nyob rau hauv cov txheej txheem vuam, muaj nuj nqis rau lawv lub zog siab, thiab muaj peev xwm tsim tau welds. Ib lo lus nug ntawm welders yog seb cov hluav taws xob no tuaj yeem siv nrog AC (hloov pauv tam sim no). Cov lus teb luv yog yog, tab sis nrog cov kev txwv tseem ceeb uas cuam tshuam Weld zoo thiab ua tau zoo.
Tus qauv tsim ntawm 7018 electrodes thiab tam sim no kev sib raug zoo
7018 electrodes yog feem ntau engineered rau DC (ncaj qha tam sim no) vuam, tshwj xeeb DC rov qab polarity (qhov twg ntawm electrode yog qhov zoo thiab lub workpiece tsis zoo. Tus qauv no haum nrog rau electrode lub hom phiaj tseem ceeb: qhov kev tiv thaiv hluas tsawg, kom muaj kev tiv thaiv hydrogen zoo thiab txo cov dej pheeb suab hauv weld pas dej. DC Tam sim no muab qhov kev ruaj khov, raws li nws tswj cov hluav taws xob tsis sib xws, tiv thaiv arc flicker lossis tua hluav taws.
AC tam sim no, los ntawm kev sib piv, hloov kev taw qhia 50 lossis 60 lub sij hawm ib ob, ua rau arc rov pib dua nrog txhua lub voj voog. Qhov kev tsis tsim nyog no tuaj yeem cuam tshuam cov txheej flux flux muaj peev xwm tsim cov ntaub qhwv txuas ntxiv. Qhov 7018 lub flux tsis zoo rau qhov no rov ua ARC cuam tshuam, tawm ntawm cov pa hluav taws xob uas tsis muaj pa hluav taws xob (oxygen, nitrogen) kom paug lub pas dej weld. Cov paug no ua rau tsis xws luag
Kev cov nyom ntawm AC vuam nrog 7018
Arc stability yog qhov tseem ceeb tshaj plaws thaum siv 7018 ntawm AC. Txawm hais tias muaj lub zoo -}} kev hloov tshiab tuaj yeem ua rau arc rau "plob hav zoov lossis dhia nyuaj rau kev tswj hwm kev ua kom zoo nkauj weld hlaws dai. Qhov no yog tshwj xeeb tshaj yog cov khoom siv nyias, uas muaj arc uas muaj arc yuav hlawv los ntawm kev ua haujlwm lossis tsim qhov tsis sib xws. On tuab hlau, qhov tsis txaus ntseeg tuaj yeem ua rau tsis tiav Fusion ntawm kev hla dhau, qhov txaus ntshai tsis txaus ntseeg hauv cov ntawv thov kev tsim qauv.
Hydrogen tswj yog lwm qhov kev txhawj xeeb . 7018 'b tsawg hydrogen faib (H4 lossis H8) cia siab rau kev nqus dej noo los ntawm cov huab cua. AC lub arc tsis ruaj khov Arc muaj peev xwm ntim cov pas dej weld, pub nrog cov hlau molten, nce qib hydrogen. Hauv cov kab tuab lossis siab {{5 5}} muaj zog ntawm hydrogen- Txoj kev pheej hmoo ntawm hom tsis muaj peev xwm tawg uas tuaj yeem tshwm sim teev lossis hnub tom qab vuam.
Weld tsos kuj cuam tshuam. Ac vuam nrog 701 feem ntau ua cov hlaws dai tsis xwm yeem, nrog lub ntsej muag thiab tsis sib xws kev pab them nqi. Lub shell yuav tsis tshem tawm kom huv si, xav kom ntau tshaj tawm- weld tu thiab nce txoj kev pheej hmoo ntawm sluag infusions yog tias tsis tau tshem tawm. Hauv kev lag luam nrog Kev Ntsuam Xyuas Cov Qauv Kev Ntsuam Xyuas nruj tshaj plaws- Xws li cov khoom siv fabrications zoo li no tuaj yeem ua rau muaj kev cia siab rau Weld kom muaj kev cia siab.
Thaum oos vuam nrog 7018 tej zaum yuav tau txiav txim siab
Dua li ntawm cov kev sib tw no, pot vuam nrog 7018 yog qee zaum tau sim nyob rau hauv cov chaw tiaj tiaj uas tsuas yog AC muaj cov chaw tsim khoom, xws li cov chaw taws lossis cov chaw taws teeb kho. Hauv cov xwm txheej zoo li no, cov kab mob Welders yuav siv AC Yog tias tsis muaj DC cov khoom siv tau siv tau, ua ntej ua ntej kev txhim kho ib ntus dhau ntawm cov kev mob zoo ib ntus. Txawm li cas los xij, qhov no tsis pom zoo rau cov ntawv tseem ceeb, raws li kev pheej hmoo ntawm cov teeb meem zais yog siab heev.
Qee cov laus AC Machine nrog "stabilizer" nta lossis siab - zaus tuaj yeem txhim kho arc stability marginal. Cov kab ke no pab rov ua lub arc thaum txhua lub voj voog, txo cov flicker. Thaum ua khub nrog ceev faj cov txheej txheem {{} xws li ua kom muaj kev sib tw luv luv thiab} kev sib koom ua ke, thiab kho cov khoom siv ua liaj ua teb). Txawm tias tom qab ntawd, cov welds yuav tsis phim cov uas tau ua nrog DC tam sim no.
Kev coj ua zoo tshaj plaws thiab kev xaiv
Rau cov txiaj ntsig txhim khu kev qha, 7018 cov hluav taws xob yuav tsum tau siv ib txwm siv nrog DC lub zog thaum ua tau. DC ua kom muaj lub arc ruaj khov, kev ua kom zoo rau cov txheej txheem sib txuas, thiab qib qis} Qhov tseem ceeb rau AWS D1.1 (cov qauv qauv vuam {}} steel). Yog tias AC yog qhov kev xaiv nkaus xwb, Welders yuav tsum tau ua kauj ruam txo cov kev phom sij (1/4 nti los yog tsawg dua) qhov chaw tawg tau qis dua.
Thaum AC yuav tsum tau siv rau cov ntaub ntawv tuab, lwm cov hluav taws xob zoo dua {}} tua qee qhov muaj zog tab sis muaj kev tswj hwm ruaj khov thiab kev tswj hwm slag. Thaum lawv tsis phim 7018 lub Tensile lub zog (60,000 psi vs. 70}}}}}}
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Thaum 7018 electrodes muaj peev xwm siv tau siv nrog AC tam sim no, kev xyaum tsis pom zoo rau qhov tseem ceeb lossis cov qauv vuam. AC qhov xam pom qhov Incit Insmines Undermress's Electrode cov txiaj ntsig hydrogen ntau, nce kev phom sij, thiab muaj kev cuam tshuam zoo rau Weld lub zog. Rau ib ntus, qis {- kev muaj kev muaj kev ntxhov siab kho hauv ac ac {}}}}}}}}}} Txoj kev txwv tsi yog lub caij kawg, tab sis nrog kev txwv nruj me nyuam.
Hauv kev nqis tes ua haujlwm, DC lub zog tseem tus qauv rau 7018 Vuam, kom muaj kev sib tw, siab}}} tseem ceeb app. Welders yuav tsum tau ua qhov kev txiav txim siab DC cov khoom siv thaum ua haujlwm nrog 70 8}} puas muaj peev xwm ua kom tau txais kev ntseeg siab, puas tsuaj {{{free pob qij txha.
