Kuziva izvo zvekutanga nezve E7018 low-hydrogen stick electrode kunogona kubatsira mukunzwisisa maitiro ekuwedzera kushanda kwavo, kuita kwavo uye mawelds avanogona kugadzira.
Tsvimbo welding inoramba iri kiyi yemabasa akawanda ekuwelda, muchidimbu nekuti zvinhu zvinoshandiswa mumashandisirwo mazhinji zvinoramba zvichizvikweretesa kune iyo nzira, uye iyo iyo iyo vazhinji vanogadzira welding vanonyatsoziva.Kana zvasvika pakunamira welding, American Welding Society (AWS; Miami, FL) E7018 stick electrode isarudzo yakajairika nekuti inopa akakodzera mashini uye makemikari zvivakwa zvemhando dzakasiyana dzekushandisa, pamwe neakaderera hydrogen mazinga kuti abatsire kudzivirira kuputika kwehydrogen-induced kuputika. .
Kuziva izvo zvekutanga nezve E7018 low-hydrogen stick electrode kunogona kubatsira mukunzwisisa mashandiro avo, kuita kwavo, uye zvinokonzeresa welds.Semutemo wakajairika, E7018 stick electrode inopa yakaderera spatter mazinga uye yakatsetseka, yakagadzikana, uye yakanyarara arc.Aya mafiller simbi maitiro anopa welding opareta kutonga kwakanaka pamusoro pearc uye kuderedza kudiwa kwekucheneswa kwemashure-weld - zvese zvakakosha mumashandisirwo anoda kutarisisa kunaka kweweld uye kupinza kwekupisa, uye izvo zviri pamazuva ekupedzisira.
Aya maelectrode anopa yakanaka deposition mitengo uye kupinza kwakanaka, zvinoreva kuti vanokwenenzvera vanogona kuwedzera simbi yeweld mujointi panguva yakapihwa kupfuura mamwe akawanda maelectrode etsvimbo (akadai seE6010 kana E6011), uye anogona kuramba achidzivirira kukanganisa kweweld sekushaikwa kwekusanganiswa. .Kuwedzerwa kwezvinhu zvakaita sehupfu hwesimbi, manganese, uye silicon kune aya maelectrode anopa mabhenefiti akasiyana, anosanganisira (asi asina kuganhurirwa ku) kugona kubudirira kupinza kuburikidza nehumwe tsvina, marara, kana chigayo.
Arc yakanaka inotanga uye inotangazve, iyo inobatsira kubvisa nyaya dzakaita seporosity pakutanga kweweld, ndechimwe chibatsiro cheE7018 stick electrodes.Nekudzora kwakanaka (kutanga arc zvakare), zvinodikanwa kutanga kubvisa iyo silicon deposit inoumba pamagumo e electrode.Zvakakosha, zvisinei, kuongorora zvese zvinodiwa usati waiswa welding, sezvo mamwe macode kana maitirwo asingabvumidze kudzikiswa kwetsvimbo electrode.
Sezvakataurwa muchikamu chavo cheAWS, E7018 stick electrode inopa hushoma hwe70,000 psi tensile simba (inosarudzwa ne "70") uye inogona kushandiswa munzvimbo dzose dzewelding (inosarudzwa ne"1").I "8" inoreva pasi-hydrogen coating, pamwe chete nepakati pekupinda iyo electrode inopa uye mhando dzemazuva ano dzinoda kushanda.Pamwe chete neyakajairwa AWS kupatsanurwa, E7018 tsvimbo maelectrode anogona kuve nemamwe madhizaini akadai se "H4" uye "H8" ayo anoreva huwandu hwehudhirojeni hunogona kuvharika iyo yekuzadza simbi inoiswa muweld.Mazita eH4, semuenzaniso, anoratidza kuti weld deposit ine 4 ml kana isingasviki yehydrogen diffusible pa100 g ye weld metal.
Electrodes ane “R” dhizaini - senge E7018 H4R - akaedzwa chaiwo uye akaonekwa seanodzivirira hunyoro nemugadziri.Kuti uwane zita iri, chigadzirwa chinofanirwa kuramba hunyoro mukati mechikamu chakapihwa mushure mekuratidzwa kune 80 deg F tembiricha uye 80 muzana hunyoro hunyoro kwemaawa mapfumbamwe.
Chekupedzisira, kushandiswa kwe "-1" pane kamuti electrode classification (eg E7018-1) zvinoreva kuti chigadzirwa chinopa kunatsiridza kusimba kwemaitiro kubatsira kuramba kutsemuka mumaapplication akakosha kana pakudzika kwakadzika.
E7018 low-hydrogen stick electrodes inogona kushanda neanogara aripo (CC) simba sosi inopa angave alternating current (AC) kana direct current electrode positive (DCEP).E7018 filler metals ine mamwe maarc stabilizers uye/kana iron poda mucoating kubatsira kuchengetedza arc yakagadzikana kana welding uchishandisa AC ikozvino.Mukana wekutanga wekushandisa AC neE7018 maelectrode ndiko kubviswa kwearc blow, iyo inogona kuitika kana DC welding ichishandisa pasi-pa-pa-yakanaka pasi kana kana welding zvikamu zvine magineti.Pasinei nekuve nemamwe maarc stabilizers, mawelds anogadzirwa uchishandisa AC anogona kunge asina kunyatsotsetseka seaya akagadzirwa neDC, zvisinei, nekuda kwekuchinja kunoramba kuripo munzira yazvino kunoitika kusvika ka120 pasekondi.
Kana welding neDCEP ikozvino, ma electrode aya anogona kupa kudzora kuri nyore kwearc uye inoyevedza weld bead, sezvo kutungamira kwekuyerera kwazvino kunogara.Kuti uwane mibairo yakanaka, tevera kurudziro yemugadziri wekushandisa paramita yedhayamita ye electrode.
Kufanana nechero maitiro uye electrode, nzira yakakodzera kana stick welding neE7018 stick electrode yakakosha kuve nechokwadi chemhando yeweld yakanaka.Bata arc kureba - zvakanaka kuchengetedza electrode pamusoro pemvura yeweld - kuchengetedza arc yakagadzikana uye kuderedza mukana weporosity.
Paunenge uchiputira munzvimbo dzakadzika uye dzakachinjika, nongedzera/dhonza electrode 5 deg kusvika 15 deg kure negwara rekufamba kuti ubatsire kuderedza mukana wekuteya slag muweld.Kana welding wakamira wakamira kumusoro, nongedzera/sundidzira electrode kumusoro 3 deg kusvika 5 deg uchifamba uchikwira, uye shandisa kanongedzo kadiki kekuruka kubatsira kudzivirira weld kubva mukudonha.Weld bead upamhi hunofanira kazhinji kuva kaviri nehafu dhayamita ye electrode's core waya yeflat uye yakachinjika welds, uye kaviri nehafu kusvika katatu dhayamita yepakati kune vertical-up welds.
E7018 tsvimbo maelectrode anowanzo takura kubva kumugadziri mune yakavharwa pasuru kuti azvidzivirire kubva pakukuvadzwa kwemwando uye kusimudza.Zvakakosha kuti pasuru iyoyo irambe yakasimba uye ichichengetwa munzvimbo yakachena, yakaoma kusvikira zvigadzirwa zvagadzirira kushandiswa.Kana angovhurwa, maelectrode etsvimbo anofanirwa kubatwa nemagirovhosi akachena, akaoma kudzivirira tsvina nemarara kubva kunamira pakuputira uye kubvisa mukana wekutora mwando.Maelectrode zvakare anofanirwa kubatwa muchoto pane tembiricha inokurudzirwa nemugadziri mushure mekuvhurwa.
Mamwe macode anoraira kuti maelectrode etsvimbo anogona kuva kunze kwenguva yakavharwa kana hovhoni yekuchengetera uye kana kana kuti kakawanda sei simbi yefiller inogona kugadziriswa (kureva kuti kuburikidza nekubheka kwakakosha kubvisa hunyoro hwakanyura) isati yaraswa.Gara uchitarisa zvinongedzo zvinoshanda uye macode ezvinodiwa nebasa rega rega.
Nguva yekutumira: Zvita-23-2022