Kudziwa zoyambira za E7018 low-hydrogen stick electrode kungakhale kothandiza pakumvetsetsa momwe angakulitsire ntchito yawo, momwe amagwirira ntchito komanso ma welds omwe angapange.
Kuwotcherera ndodo kumakhalabe kofunikira pantchito zambiri zowotcherera, mwa zina chifukwa zida zomwe zimagwiritsidwa ntchito pazinthu zambiri zimapitilira kubwereketsa ntchitoyi, ndipo ndi imodzi yomwe ambiri ogwiritsa ntchito kuwotcherera amaidziwa bwino.Pankhani yowotcherera ndodo, American Welding Society (AWS; Miami, FL) E7018 ndodo ma elekitirodi ndi kusankha wamba chifukwa amapereka oyenera makina ndi mankhwala katundu kwa zosiyanasiyana ntchito, pamodzi ndi otsika mlingo wa haidrojeni kuti athandize kupewa kusweka hydrogen-induced .
Kudziwa zoyambira za E7018 low-hydrogen stick electrode kumatha kukhala kothandiza pakumvetsetsa momwe amagwirira ntchito, momwe amagwirira ntchito, komanso ma welds ake.Monga lamulo, ma elekitirodi a E7018 amapereka masipopu otsika komanso arc yosalala, yokhazikika komanso yabata.Mawonekedwe azitsulo zazitsulo izi amapatsa wowotchererayo kuwongolera bwino pa arc ndikuchepetsa kufunikira kotsuka pambuyo pa weld - zinthu zonse zofunika pakugwiritsa ntchito zomwe zimafunika kusamala kwambiri ndi mtundu wa weld ndi kuyika kwa kutentha, komanso zomwe zili munthawi yake.
Ma elekitirodi awa amapereka mitengo yabwino yolowera komanso kulowa bwino, zomwe zikutanthauza kuti owotcherera amatha kuwonjezera zitsulo zowotcherera mu olowa mu nthawi yoperekedwa kuposa maelekitirodi ena ambiri (monga E6010 kapena E6011), ndipo amatha kupewa zolakwika zowotcherera monga kusowa kwa maphatikizidwe. .Kuphatikizika kwa zinthu monga chitsulo ufa, manganese, ndi silicon ku maelekitirodi amenewa kumapereka ubwino wosiyana, kuphatikizapo (koma osati malire) luso lotha kuwotcherera bwino mu dothi, zinyalala, kapena mphero.
Arc yabwino imayamba ndikuyambiranso, zomwe zimathandiza kuthetsa nkhani ngati porosity kumayambiriro kwa weld, ndi phindu lina la ma electrode a ndodo ya E7018.Pazoletsa zabwino (kuyambitsanso arc), ndikofunikira kuchotsa kaye gawo la silicon lomwe limapanga kumapeto kwa electrode.Ndikofunika, komabe, kutsimikizira zofunikira zonse musanawotchere, popeza ma code kapena njira zina sizimaloleza kuletsa ma elekitirodi a ndodo.
Monga taonera m'gulu lawo la AWS, ma elekitirodi a ndodo a E7018 amapereka mphamvu zosachepera 70,000 za psi (zosankhidwa ndi "70") ndipo zingagwiritsidwe ntchito m'malo onse owotcherera (osankhidwa ndi "1")."8" imatanthawuza kuyika kwa hydrogen yochepa, komanso kulowetsa kwapakati komwe electrode imapereka ndi mitundu yamakono yomwe ikufunika kuti igwire ntchito.Pamodzi ndi gulu lokhazikika la AWS, ma elekitirodi a ndodo a E7018 amatha kukhala ndi zopangira zina monga "H4" ndi "H8" zomwe zimatanthawuza kuchuluka kwa haidrojeni wotayika womwe zitsulo zodzaza zimayika mu weld.Matchulidwe a H4, mwachitsanzo, akuwonetsa kuti weld deposit ili ndi 4 ml kapena kuchepera kwa haidrojeni wotayika pa 100 g ya chitsulo chowotcherera.
Ma Electrodes okhala ndi "R" designator - monga E7018 H4R - adayesedwa mwachindunji ndipo amawoneka kuti sagonjetsedwa ndi chinyezi ndi wopanga.Kuti adziwe dzinali, mankhwalawa amayenera kukana chinyezi mkati mwamtundu womwe waperekedwa atawonetsedwa kutentha kwa 80 deg F ndi 80% chinyezi chapafupi kwa maola asanu ndi anayi.
Pomaliza, kugwiritsa ntchito "-1" pagulu la ma elekitirodi a ndodo (mwachitsanzo E7018-1) kumatanthauza kuti mankhwalawo amathandizira kulimba kwamphamvu kuti athe kukana kusweka muzofunikira kwambiri kapena kutentha kocheperako.
E7018 low-hydrogen ndodo maelekitirodi amatha kugwira ntchito ndi nthawi zonse panopa (CC) mphamvu gwero kuti amapereka mwina alternating panopa (AC) kapena Direct current electrode positive (DCEP).Zitsulo zodzaza ndi E7018 zimakhala ndi zowonjezera zowonjezera komanso/kapena ufa wachitsulo pakupaka kuti uthandizire kukhala ndi arc yokhazikika powotcherera pogwiritsa ntchito AC pano.Ubwino waukulu wogwiritsa ntchito AC ndi ma elekitirodi a E7018 ndikuchotsa kuwotcherera kwa arc, komwe kumatha kuchitika ngati kuwotcherera kwa DC kumagwiritsa ntchito malo ocheperako kapena powotcherera magawo amagetsi.Ngakhale ali ndi zowonjezera zowonjezera za arc, ma welds opangidwa pogwiritsa ntchito AC sangakhale osalala ngati omwe amapangidwa ndi DC, komabe, chifukwa cha kusintha kosalekeza komwe kukuchitika komwe kumachitika nthawi 120 pa sekondi iliyonse.
Pamene kuwotcherera ndi DCEP panopa, maelekitirodi amenewa akhoza kupereka mosavuta kulamulira arc ndi wokongola weld mkanda, popeza mayendedwe oyenda panopa ndi mosalekeza.Kuti mupeze zotsatira zabwino, tsatirani malingaliro a wopanga pa magawo ogwiritsira ntchito ma electrode awiri.
Monga njira iliyonse ndi ma elekitirodi, njira yoyenera mukawotchera ndodo ndi ma elekitirodi a ndodo ya E7018 ndiyofunikira kuti mutsimikizire mtundu wabwino wa weld.Gwirani kutalika kwa arc - ndikusunga ma elekitirodi pamwamba pa thambi la weld - kuti mukhale ndi khola lokhazikika ndikuchepetsa mwayi wa porosity.
Pamene kuwotcherera mu malo lathyathyathya ndi yopingasa, mfundo / kukoka elekitirodi 5 deg kuti 15 deg kutali ndi malangizo a ulendo kuthandiza kuchepetsa msampha slag mu kuwotcherera.Mukawotcherera moyimirira, lozani / kanikizani elekitirodi m'mwamba 3 deg mpaka 5 deg mukuyenda m'mwamba, ndipo gwiritsani ntchito njira yoluka pang'ono kuti kuwotchererako kusagwe.Kuwotcherera mkanda m'lifupi nthawi zambiri kuyenera kukhala kuwirikiza kawiri ndi theka kukula kwa waya wapakatikati pa ma elekitirodi a ma weld athyathyathya ndi opingasa, komanso kuwirikiza kawiri ndi theka mpaka katatu m'mimba mwake wa ma welds ofukula.
Maelekitirodi a E7018 nthawi zambiri amatumizidwa kuchokera kwa wopanga mu phukusi losindikizidwa bwino kuti ateteze kuwonongeka kwa chinyezi ndikunyamula.Ndikofunikira kusunga phukusilo kuti lisungidwe bwino ndi kusungidwa pamalo oyera, owuma mpaka zinthuzo zitakonzeka kugwiritsidwa ntchito.Akatsegulidwa, maelekitirodi a ndodo ayenera kugwiridwa ndi magolovesi oyera, owuma kuti ateteze dothi ndi zinyalala kuti zisamamatire ndi zokutira ndikuchotsa mwayi wotola chinyezi.Ma elekitirodi amayeneranso kusungidwa mu uvuni pamatenthedwe omwe amavomerezedwa ndi wopanga atatsegulidwa.
Ma code ena amalamula kuti ma elekitirodi a ndodo angakhale nthawi yayitali bwanji kunja kwa chosindikizira chosindikizidwa kapena uvuni wosungira komanso ngati zitsulo zodzaza zitsulo zingathe kukonzedwanso kangati (mwachitsanzo, kudzera mu kuphika kwapadera kuti muchotse chinyezi) musanatayidwe.Nthawi zonse fufuzani zofunikira ndi ma code awo pa zofunikira pa ntchito iliyonse.
Nthawi yotumiza: Dec-23-2022