Paub txog cov hauv paus ntsiab lus ntawm E7018 low-hydrogen stick electrodes tuaj yeem pab tau rau hauv kev nkag siab tias yuav ua li cas kom lawv ua haujlwm tau zoo, lawv cov kev ua tau zoo thiab cov welds lawv tuaj yeem tsim tau.
Cov hlua vuam tseem yog qhov tseem ceeb rau ntau txoj haujlwm vuam, ib feem vim tias cov ntaub ntawv siv hauv ntau daim ntawv thov txuas ntxiv qiv lawv tus kheej rau cov txheej txheem, thiab nws yog ib qho uas ntau tus tswv vuam paub zoo.Thaum nws los txog rau vuam, American Welding Society (AWS; Miami, FL) E7018 stick electrodes yog ib qho kev xaiv vim tias lawv muab cov khoom siv zoo thiab tshuaj lom neeg rau ntau yam kev siv, nrog rau qib qis hydrogen los pab tiv thaiv hydrogen-induced cracking. .
Paub txog cov hauv paus ntsiab lus ntawm E7018 low-hydrogen stick electrodes tuaj yeem pab tau kom nkag siab txog lawv txoj haujlwm, kev ua haujlwm, thiab ua rau cov welds.Raws li txoj cai dav dav, E7018 stick electrodes muab cov qib qis qis thiab ua kom zoo, ruaj khov, thiab nyob ntsiag to.Cov yam ntxwv ntawm cov hlau muab tub lim no muab cov neeg ua haujlwm vuam zoo tswj lub arc thiab txo qhov kev xav tau ntawm kev ntxuav tom qab vuam - ob qho tib si tseem ceeb hauv cov ntawv thov uas yuav tsum tau ua tib zoo saib xyuas qhov zoo ntawm vuam thiab cua sov, thiab cov hnub kawg.
Cov electrodes no muaj cov txiaj ntsig zoo thiab kev nkag mus zoo, uas txhais tau hais tias cov neeg ua haujlwm vuam tuaj yeem ntxiv cov hlau txuas ntxiv rau hauv lub sijhawm sib koom ua ke ntau dua li lwm cov khoom siv hluav taws xob (xws li E6010 lossis E6011), thiab tseem tuaj yeem ua kom tsis txhob muaj qhov tsis xws luag xws li tsis muaj fusion. .Qhov sib ntxiv ntawm cov ntsiab lus xws li hlau hmoov, manganese, thiab silicon rau cov electrodes no muab qhov zoo sib xws, suav nrog (tab sis tsis txwv rau) lub peev xwm los ua tiav vuam los ntawm qee qhov av, khib nyiab, lossis zeb nplai.
Zoo arc pib thiab rov pib dua, uas pab tshem tawm cov teeb meem xws li porosity thaum pib ntawm vuam, yog ib qho txiaj ntsig ntxiv ntawm E7018 stick electrodes.Rau qhov kev txwv zoo (pib lub arc dua), nws yog ib qho tsim nyog yuav tsum xub tshem tawm cov silicon tso nyiaj uas ua rau qhov kawg ntawm cov electrode.Nws yog ib qho tseem ceeb, txawm li cas los xij, txhawm rau txheeb xyuas txhua qhov yuav tsum tau ua ua ntej vuam, vim qee cov lej lossis cov txheej txheem tsis tso cai rau kev txwv ntawm cov nplaum electrodes.
Raws li tau sau tseg hauv lawv qhov kev faib tawm AWS, E7018 stick electrodes muab qhov tsawg kawg nkaus ntawm 70,000 psi tensile lub zog (tsim los ntawm "70") thiab tuaj yeem siv rau hauv txhua txoj haujlwm vuam (tsim los ntawm "1")."8" yog hais txog cov txheej txheem hydrogen tsawg, nrog rau kev nkag mus rau nruab nrab ntawm cov electrode muab thiab hom tam sim no nws xav tau rau kev ua haujlwm.Nrog rau cov txheej txheem AWS kev faib tawm, E7018 stick electrodes tuaj yeem muaj tus qauv tsim ntxiv xws li "H4" thiab "H8" uas xa mus rau cov nyiaj diffusible hydrogen cov muab tub lim hlau tso rau hauv qhov vuam.Piv txwv li, ib qho kev tsim H4 qhia tau hais tias cov nyiaj tso nyiaj muaj 4 ml lossis tsawg dua ntawm diffusible hydrogen ib 100 g ntawm cov hlau.
Electrodes nrog tus "R" tus tsim - xws li E7018 H4R - tau dhau los kuaj tshwj xeeb thiab tau pom tias muaj kev tiv thaiv los ntawm cov chaw tsim khoom.Txhawm rau kom tau txais qhov kev xaiv no, cov khoom yuav tsum tiv thaiv cov dej noo nyob rau hauv ib qho chaw tom qab raug rau 80 deg F kub thiab 80 feem pua ntawm cov av noo nyob rau cuaj teev.
Thaum kawg, kev siv "-1" ntawm cov khoom siv hluav taws xob sib cais (xws li E7018-1) txhais tau hais tias cov khoom muaj kev cuam tshuam zoo dua los pab tiv thaiv kev tawg hauv cov ntawv thov tseem ceeb lossis qis dua.
E7018 low-hydrogen stick electrodes tuaj yeem ua haujlwm nrog lub zog tam sim no (CC) uas muab cov khoom siv tam sim no (AC) lossis ncaj qha tam sim no electrode zoo (DCEP).E7018 muab tub lim hlau muaj ntxiv arc stabilizers thiab / los yog hlau hmoov nyob rau hauv txheej los pab tswj lub arc ruaj khov thaum vuam siv AC tam sim no.Lub ntsiab kom zoo dua ntawm kev siv AC nrog E7018 electrodes yog tshem tawm ntawm arc tshuab, uas tuaj yeem tshwm sim thaum DC vuam siv tsawg dua-zoo tagnrho hauv av lossis thaum vuam hlau nplaum.Txawm hais tias muaj cov arc stabilizers ntxiv, cov welds uas siv AC yuav tsis zoo li cov uas ua nrog DC, txawm li cas los xij, vim qhov kev hloov pauv tsis tu ncua ntawm cov kev taw qhia tam sim no uas tshwm sim txog 120 zaug hauv ib ob.
Thaum vuam nrog DCEP tam sim no, cov electrodes tuaj yeem muab kev tswj xyuas yooj yim ntawm cov arc thiab cov hlaws zoo nkauj dua, vim tias cov kev taw qhia ntawm qhov tam sim no ntws tas li.Txhawm rau kom tau txais txiaj ntsig zoo tshaj plaws, ua raws li cov chaw tsim khoom cov lus pom zoo rau kev ua haujlwm tsis zoo rau cov kab hluav taws xob electrode.
Zoo li txhua yam txheej txheem thiab electrode, cov txheej txheem tsim nyog thaum vuam nrog E7018 stick electrodes yog ib qho tseem ceeb los xyuas kom meej qhov zoo vuam zoo.Tuav lub arc ntev - qhov zoo tshaj plaws khaws cov electrode nyob rau saum toj ntawm lub weld puddle - kom muaj qhov ruaj khov arc thiab txo txoj hauv kev rau porosity.
Thaum vuam nyob rau hauv lub tiaj tus thiab kab rov tav txoj hauj lwm, taw tes / rub lub electrode 5 deg mus rau 15 deg deb ntawm cov kev taw qhia ntawm kev mus los los pab txo lub sij hawm ntawm trapping slag nyob rau hauv lub weld.Thaum vuam nyob rau hauv txoj hauj lwm ntsug-up, taw tes / thawb lub electrode upwards 3 deg mus rau 5 deg thaum taug kev mus rau pem hauv ntej, thiab siv ib tug me ntsis weaving txheej txheem los pab tiv thaiv lub weld los ntawm sagging.Lub weld hlaws dav feem ntau yuav tsum yog ob thiab ib nrab npaug ntawm txoj kab uas hla ntawm lub electrode cov tub ntxhais hlau rau lub tiaj thiab kab rov tav welds, thiab ob thiab ib nrab mus rau peb npaug ntawm cov tub ntxhais txoj kab uas hla rau ntsug-up welds.
E7018 stick electrodes feem ntau xa los ntawm cov chaw tsim khoom hauv pob hermetically kaw los tiv thaiv lawv los ntawm kev puas tsuaj los ntawm ya raws thiab tuaj tos.Nws yog ib qho tseem ceeb kom khaws cov pob ntawd kom zoo thiab khaws cia rau hauv qhov chaw huv, qhuav kom txog thaum cov khoom npaj siv.Thaum qhib, cov nplaum electrodes yuav tsum tau ua nrog huv, qhuav hnab looj tes kom tiv thaiv cov av thiab cov khib nyiab los ntawm kev ua raws li cov txheej txheem thiab tshem tawm lub sijhawm rau kev khaws cov dej noo.Cov electrodes kuj yuav tsum tau tuav hauv qhov cub ntawm qhov kub thiab txias pom zoo los ntawm cov chaw tsim khoom tom qab qhib.
Qee cov lej hais kom ntev npaum li cas lub pas hluav taws xob tuaj yeem nyob sab nraud ntawm lub ntim ntim lossis lub qhov cub thiab yog tias cov hlau muab tub lim tuaj yeem hloov tau ntau npaum li cas (piv txwv li los ntawm kev ci tshwj xeeb kom tshem tawm cov dej noo) ua ntej lawv yuav tsum muab pov tseg.Nco ntsoov sab laj cov lus qhia tshwj xeeb thiab cov lis dej num rau txhua txoj haujlwm.
Post lub sij hawm: Dec-23-2022