Ukwazi izisekelo mayelana nama-electrode e-E7018 anamathelayo aphansi kungasiza ekuqondeni ukuthi ungawasebenzisa kanjani kangcono, ukusebenza kwawo kanye nama-weld angawakhiqiza.
Ukushisela okunamathelayo kusalokhu kuyisihluthulelo semisebenzi eminingi yokushisela, ngokwengxenye ngoba izinto ezisetshenziswa ezicelweni eziningi ziyaqhubeka nokuzivumelanisa nenqubo, futhi yilokho abaningi abasebenza ngokushisela abakwazi kahle. Uma kukhulunywa ngokushisela okunamathelayo, ama-electrode okunamathelayo e-American Welding Society (AWS; Miami, FL) E7018 ayisinqumo esivamile ngoba ahlinzeka ngezakhiwo ezifanele zemishini namakhemikhali zezinhlelo zokusebenza ezahlukahlukene, kanye namazinga aphansi e-hydrogen ukusiza ukuvimbela ukuqhekeka okubangelwa yi-hydrogen.
Ukwazi izisekelo mayelana nama-electrode e-E7018 ane-hydrogen stick stick aphansi kungasiza ekuqondeni ukusebenza kwawo, ukusebenza kwawo, kanye nama-weld aphumayo. Njengomthetho ojwayelekile, ama-electrode e-E7018 stick anikeza amazinga aphansi okufafaza kanye ne-arc ebushelelezi, ezinzile, nethule. Lezi zici zensimbi yokugcwalisa zinikeza umqhubi we-welding ukulawula okuhle phezu kwe-arc futhi zinciphisa isidingo sokuhlanzwa ngemva kokushiswa - kokubili izici ezibalulekile ekusetshenzisweni ezidinga ukunakwa ngokucophelela kwekhwalithi yokushiswa kanye nokufakwa kokushisa, kanye nalezo ezikuzinsuku zokugcina eziqinile.
Lawa ma-electrode anikeza amazinga amahle okufakwa kanye nokungena okuhle, okusho ukuthi abaqhubi bokushisela bangangeza insimbi eyengeziwe yokushisela esibayeni ngesikhathi esithile kunamanye ama-electrode amaningi okunamathela (njenge-E6010 noma i-E6011), futhi basengagwema amaphutha okushisela njengokuntuleka kokuhlanganiswa. Ukwengezwa kwezinto ezifana nempuphu yensimbi, i-manganese, ne-silicon kulawa ma-electrode kunikeza izinzuzo ezihlukile, kufaka phakathi (kodwa kungagcini lapho) ikhono lokushisela ngempumelelo ngokusebenzisa ukungcola, udoti, noma isikali sokugaya.
Ukuqala nokuqalisa kabusha okuhle kwe-arc, okusiza ekuqedeni izinkinga ezifana nokugoba ekuqaleni kwe-weld, kuyinzuzo eyengeziwe yama-electrode okunamathela e-E7018. Ukuze uthole ukuphinda okuhle (ukuqala i-arc futhi), kubalulekile ukususa kuqala idiphozithi ye-silicon eyakheka ekugcineni kwe-electrode. Nokho, kubalulekile ukuqinisekisa zonke izidingo ngaphambi kokushisela, njengoba amanye amakhodi noma izinqubo azivumeli ukumiswa kabusha kwama-electrode okunamathela.
Njengoba kuphawuliwe esigabeni sabo se-AWS, ama-electrode e-stick e-E7018 anikeza okungenani amandla okudonsa angama-70,000 psi (aqokwe ngu-“70”) futhi angasetshenziswa kuzo zonke izikhundla zokushisela (aqokwe ngu-“1”). I-“8” ibhekisela ekumbozweni kwe-hydrogen ephansi, kanye nokungena okuphakathi okunikezwa yi-electrode kanye nezinhlobo zamanje ezidingayo ukuze isebenze. Kanye nesigaba esijwayelekile se-AWS, ama-electrode e-stick e-E7018 angaba nezimpawu ezengeziwe ezifana ne-“H4” kanye ne-“H8” ezibhekisela enanini le-hydrogen esakazekayo amadiphozithi ensimbi yokugcwalisa ku-weld. Isibonelo, i-H4 ikhomba ukuthi idiphozithi ye-weld ine-4 ml noma ngaphansi kwe-hydrogen esakazekayo ngamagremu ayi-100 ensimbi e-weld.
Ama-electrode anophawu lwe-“R” — njenge-E7018 H4R — ahlolwe ngendlela ethile futhi abhekwe njengomelana nomswakama ngumkhiqizi. Ukuze athole lokhu kuqokwa, umkhiqizo kumele umelane nomswakama ngaphakathi kwebanga elinikeziwe ngemuva kokuvezwa ekushiseni okungu-80 deg F kanye nomswakama ongu-80% amahora ayisishiyagalolunye.
Okokugcina, ukusetshenziswa kuka-“-1” ekuhlukanisweni kwe-stick electrode (isb. E7018-1) kusho ukuthi umkhiqizo unikeza ukuqina okuthuthukisiwe komthelela ukusiza ukumelana nokuqhekeka ezisetshenziswa ezibalulekile noma emazingeni okushisa aphansi.
Ama-electrode e-E7018 anamathela ngaphansi kwe-hydrogen angasebenza ngomthombo wamandla oqhubekayo (CC) ohlinzeka ngogesi oshintshashintshayo (AC) noma i-electrode yamanje eqondile (DCEP). Izinsimbi zokugcwalisa ze-E7018 zineziqinisi ezengeziwe ze-arc kanye/noma i-iron powder ephepheni ukusiza ukugcina i-arc ezinzile lapho kushintshwa kusetshenziswa ugesi we-AC. Inzuzo eyinhloko yokusebenzisa i-AC nama-electrode e-E7018 ukususa i-arc blow, okungenzeka lapho kushintshwa i-DC kusetshenziswa i-grounding engalungile noma lapho kushintshwa izingxenye ezisebenzisa ugesi. Naphezu kokuba neziqinisi ezengeziwe ze-arc, ama-weld enziwe nge-AC angase angabi bushelelezi njengalawo enziwe nge-DC, nokho, ngenxa yezinguquko eziqhubekayo esiqondisweni samanje ezenzeka izikhathi ezifika ku-120 ngomzuzwana.
Uma ushisela nge-DCEP current, lawa ma-electrode anganikeza ukulawula okulula kwe-arc kanye ne-weld bead ekhangayo kakhulu, njengoba isiqondiso sokugeleza kwamanje sihlala njalo. Ukuze uthole imiphumela emihle kakhulu, landela izincomo zomenzi zamapharamitha okusebenza kobubanzi be-electrode.
Njenganoma iyiphi inqubo kanye ne-electrode, inqubo efanele lapho kushintshwa induku ngama-electrode e-E7018 kubalulekile ukuqinisekisa ikhwalithi enhle yokushintshwa. Bamba ubude be-arc obuqinile - okungcono ukugcina i-electrode ingaphezulu nje kwe-weld puddle - ukuze ugcine i-arc izinzile futhi unciphise amathuba okuba ne-porosity.
Uma ushisela ezindaweni ezisicaba nezivundlile, khomba/hudula i-electrode ngama-degree angu-5 kuya kwangu-15 kude nendlela yokuhamba ukuze usize ukunciphisa amathuba okubamba i-slag ku-weld. Uma ushisela endaweni evundlile, khomba/cindezela i-electrode phezulu ngama-degree angu-3 kuya kwangu-5 ngenkathi uhamba uye phezulu, bese usebenzisa indlela yokweluka kancane ukusiza ukuvimbela i-weld ukuthi ingagobi. Ububanzi be-weld bead ngokuvamile kufanele bube kabili nengxenye ubukhulu bentambo eyinhloko ye-electrode kuma-weld ayisicaba navundlile, kanye nobubanzi obuphindwe kabili nengxenye kuya kathathu kuma-weld avundlile.
Ama-electrode enduku e-E7018 avame ukuthunyelwa evela kumkhiqizi ngephakheji evalwe kahle ukuze avikeleke ekulimaleni komswakama nasekuthathweni kwawo. Kubalulekile ukugcina lelo phakethe liphelele futhi ligcinwe endaweni ehlanzekile, eyomile kuze kube yilapho imikhiqizo isilungele ukusetshenziswa. Uma selivuliwe, ama-electrode enduku kufanele aphathwe ngamagilavu ahlanzekile, omile ukuze kuvinjelwe ukungcola kanye nemfucumfucu ukuthi kunganamatheli embozweni futhi kuqedwe ithuba lokuthathwa komswakama. Ama-electrode kufanele futhi agcinwe kuhhavini emazingeni okushisa anconywe ngumenzi ngemva kokuvulwa.
Amanye amakhodi anquma ukuthi ama-electrode anamathelayo angaba isikhathi esingakanani ngaphandle kwephakheji evaliwe noma kuhhavini lokugcina impahla nokuthi insimbi yokugcwalisa ingalungiswa kangaki (okungukuthi ngokubhaka okukhethekile ukuze kususwe umswakama omuncwayo) ngaphambi kokuba ilahlwe. Njalo bheka imininingwane namakhodi afanele ukuze uthole izidingo zomsebenzi ngamunye.
Isikhathi sokuthunyelwe: Disemba 23-2022