Kudziwa zoyambira za ma electrode a E7018 otsika hydrogen stick kungathandize kumvetsetsa momwe angagwiritsire ntchito bwino kwambiri, magwiridwe antchito awo, komanso ma weld omwe angapange.
Kuwotcherera ndodo kumakhalabe kofunika kwambiri pa ntchito zambiri zowotcherera, chifukwa chakuti zipangizo zomwe zimagwiritsidwa ntchito m'njira zambiri zimapitilizabe kugwira ntchito, ndipo ndi chimodzi chomwe ambiri ogwiritsa ntchito kuwotcherera amadziwa bwino. Ponena za kuwotcherera ndodo, ma electrode a ndodo a American Welding Society (AWS; Miami, FL) E7018 ndi chisankho chofala chifukwa amapereka mphamvu zoyenera zamakina ndi mankhwala pa ntchito zosiyanasiyana, komanso kuchuluka kwa haidrojeni kochepa kuti athandize kupewa kusweka komwe kumabwera chifukwa cha haidrojeni.
Kudziwa zoyambira za ma electrode a E7018 otsika hydrogen stick kungathandize kumvetsetsa momwe amagwirira ntchito, magwiridwe antchito, ndi ma weld omwe amatuluka. Kawirikawiri, ma electrode a E7018 stick amapereka milingo yochepa ya ma spatter komanso arc yosalala, yokhazikika, komanso chete. Makhalidwe a zitsulo zodzaza awa amapatsa wogwiritsa ntchito welding mphamvu yabwino pa arc ndikuchepetsa kufunikira koyeretsa pambuyo pa weld - zonsezi ndizofunikira kwambiri pakugwiritsa ntchito komwe kumafuna chisamaliro chapadera pa khalidwe la weld ndi kutentha komwe kumalowetsedwa, komanso zomwe zili pa nthawi yomaliza.
Ma electrode awa amapereka kuchuluka kwabwino kwa ma deposition ndi kulowa bwino, zomwe zikutanthauza kuti ogwiritsa ntchito ma welding amatha kuwonjezera zitsulo zambiri mu cholumikiziracho pakapita nthawi kuposa ma electrode ena ambiri omata (monga E6010 kapena E6011), ndipo nthawi zambiri amatha kupewa zolakwika za welding monga kusowa kwa fusion. Kuwonjezera zinthu monga ufa wachitsulo, manganese, ndi silicon ku ma electrode awa kumapereka zabwino zapadera, kuphatikiza (koma osati kokha) kuthekera koweta bwino kudzera mu dothi, zinyalala, kapena sikelo ya mphero.
Kuyamba bwino kwa arc ndi kuyambiranso, komwe kumathandiza kuthetsa mavuto monga porosity kumayambiriro kwa weld, ndi phindu lina la ma electrode omatira a E7018. Kuti mubwezeretse bwino arc (kuyambitsanso arc), ndikofunikira choyamba kuchotsa silicon deposit yomwe imapanga kumapeto kwa electrode. Komabe, ndikofunikira kutsimikizira zofunikira zonse musanawedze, chifukwa ma code kapena njira zina sizimalola kuletsa ma electrode omatira.
Monga momwe taonera mu gulu lawo la AWS, ma electrode omatira a E7018 amapereka mphamvu yocheperako ya psi 70,000 (yomwe imatchulidwa ndi "70") ndipo ingagwiritsidwe ntchito m'malo onse owetera (yomwe imatchulidwa ndi "1"). "8" ikutanthauza chophimba chotsika cha haidrojeni, komanso kulowa kwapakati komwe electrode imapereka komanso mitundu yomwe ikufunika kuti igwire ntchito. Pamodzi ndi gulu lokhazikika la AWS, ma electrode omatira a E7018 akhoza kukhala ndi ma designator ena monga "H4" ndi "H8" omwe amatanthauza kuchuluka kwa haidrojeni yofalikira yomwe imayikidwa mu weld. Mwachitsanzo, dzina la H4 limasonyeza kuti weld deposit ili ndi 4 ml kapena kuchepera ya haidrojeni yofalikira pa 100 g ya weld metal.
Ma electrode okhala ndi chizindikiro cha "R" — monga E7018 H4R — ayesedwa mwapadera ndipo awonedwa kuti ndi otetezeka ku chinyezi ndi wopanga. Kuti apeze chizindikiro ichi, chinthucho chiyenera kukana chinyezi mkati mwa mtunda woperekedwa chikayikidwa kutentha kwa madigiri 80 F ndi chinyezi cha madigiri 80 kwa maola asanu ndi anayi.
Pomaliza, kugwiritsa ntchito "-1" pa gulu la ma electrode omatira (monga E7018-1) kumatanthauza kuti chinthucho chimapereka kulimba kwabwinoko kuti chithandizire kupirira ming'alu pa ntchito zofunika kwambiri kapena kutentha kochepa.
Ma electrode a E7018 otsika hydrogen stick amatha kugwira ntchito ndi gwero lamphamvu lokhazikika (CC) lomwe limapereka mphamvu yosinthira (AC) kapena electrode yamphamvu yolunjika (DCEP). Zitsulo zodzaza za E7018 zili ndi zokhazikika zowonjezera za arc ndi/kapena ufa wachitsulo mu utoto kuti zithandize kusunga arc yokhazikika polumikiza pogwiritsa ntchito mphamvu ya AC. Ubwino waukulu wogwiritsa ntchito AC ndi ma electrode a E7018 ndikuchotsa kuphulika kwa arc, komwe kungachitike polumikiza DC pogwiritsa ntchito nthaka yosakwanira kapena polumikiza ziwalo zokhala ndi maginito. Ngakhale kuti pali zokhazikika zowonjezera za arc, ma weld opangidwa pogwiritsa ntchito AC sangakhale osalala ngati omwe amapangidwa ndi DC, komabe, chifukwa cha kusintha kosalekeza kwa kayendedwe ka mphamvu komwe kumachitika mpaka nthawi 120 pa sekondi.
Mukalumikiza ndi DCEP current, ma electrode awa amatha kupangitsa kuti azitha kulamulira mosavuta arc ndi weld bead yokongola kwambiri, chifukwa njira yoyendetsera magetsi imakhala yokhazikika. Kuti mupeze zotsatira zabwino, tsatirani malangizo a wopanga pakugwiritsa ntchito magawo a electrode diameter.
Monga njira iliyonse ndi ma electrode, njira yoyenera yolumikizira ma stick electrode ndi ma stick electrode a E7018 ndi yofunika kuti muwonetsetse kuti ma stick electrode ndi abwino. Gwirani kutalika kwa arc - makamaka kusunga electrode pamwamba pa dziwe la weld - kuti arc ikhale yokhazikika ndikuchepetsa mwayi wokhala ndi ma porosity.
Mukalumikiza malo osalala ndi opingasa, kokerani elekitirodi 5 digiri mpaka 15 digiri kutali ndi komwe mukupita kuti muchepetse mwayi woti slag igwire mu weld. Mukalumikiza pamalo olunjika, kokerani elekitirodi mmwamba madigiri 3 digiri mpaka 5 digiri pamene mukuyenda mmwamba, ndipo gwiritsani ntchito njira yoluka pang'ono kuti muteteze weld kuti isagwe. Kukula kwa weld nthawi zambiri kuyenera kukhala kawiri ndi theka kuposa kukula kwa waya wapakati wa elekitirodi pa welds zathyathyathya ndi zopingasa, komanso kawiri ndi theka mpaka katatu kuposa kukula kwa pakati pa welds za vertical-up.
Ma electrode omatira a E7018 nthawi zambiri amatumizidwa kuchokera kwa wopanga mu phukusi lotsekedwa bwino kuti atetezedwe ku kuwonongeka kwa chinyezi ndi kutengedwa. Ndikofunikira kusunga phukusilo bwino ndikusungidwa pamalo oyera komanso ouma mpaka zinthuzo zitakonzeka kugwiritsidwa ntchito. Akatsegulidwa, ma electrode omatira ayenera kusungidwa ndi magolovesi oyera komanso ouma kuti dothi ndi zinyalala zisamamatire ku chophimbacho komanso kuti apewe mwayi wonyamula chinyezi. Ma electrode ayeneranso kusungidwa mu uvuni pa kutentha komwe wopanga amalangiza atatsegulidwa.
Ma code ena amalamula kutalika kwa ma electrode omatira omwe angakhale kunja kwa phukusi lotsekedwa kapena uvuni wosungiramo zinthu komanso ngati kapena kangati chitsulo chodzaza chingakonzedwenso (monga kudzera mu kuphika kwapadera kuti muchotse chinyezi choyamwa) chisanatayidwe. Nthawi zonse funsani zofunikira ndi ma code oyenera kuti mudziwe zofunikira pa ntchito iliyonse.
Nthawi yotumizira: Disembala-23-2022