Ho tseba lintho tsa motheo mabapi le li-electrode tsa li-electrode tse tlase tsa hydrogen-hydrogen ho ka thusa ho utloisisa mokhoa oa ho eketsa ts'ebetso ea bona, ts'ebetso ea bona le li-welds tseo ba ka li hlahisang.
Stick welding e ntse e le senotlolo bakeng sa mesebetsi e mengata ea li-welding, karolo e 'ngoe hobane lisebelisoa tse sebelisoang lits'ebetsong tse ngata li ntse li tsoela pele ho sebetsa,' me ke eona eo basebetsi ba bangata ba li-welding ba e tsebang hantle.Ha ho tluoa tabeng ea li-welding, American Welding Society (AWS; Miami, FL) E7018 stick electrode ke khetho e tloaelehileng hobane e fana ka thepa e loketseng ea mechine le ea lik'hemik'hale bakeng sa mefuta e sa tšoaneng ea lisebelisoa, hammoho le maemo a tlaase a haedrojene ho thusa ho thibela ho phatloha ho bakoang ke hydrogen. .
Ho tseba lintlha tsa motheo mabapi le li-electrode tsa li-electrode tse tlase tsa haedrojene tsa E7018 ho ka thusa ho utloisisa ts'ebetso ea tsona, ts'ebetso le li-welds tse hlahisoang.E le molao o akaretsang, li-electrode tsa lithupa tsa E7018 li fana ka maemo a tlase a spatter le arc e boreleli, e tsitsitseng le e khutsitseng.Litšobotsi tsena tsa tšepe tsa filler li fa opareitara ea welding taolo e ntle holim'a arc le ho fokotsa tlhoko ea ho hloekisoa ka mor'a weld - lintlha tse peli tsa bohlokoa lits'ebetsong tse hlokang tlhokomelo e hlokolosi ho boleng ba weld le ho kenya mocheso, le tse behiloeng ka nako e thata.
Li-electrode tsena li fana ka litefiso tse ntle tsa deposition le ho kenella hantle, ho bolelang hore basebelisi ba welding ba ka eketsa tšepe ea weld ka har'a lenonyeletso ka nako e fanoeng ho feta li-electrode tse ling tse ngata (tse kang E6010 kapa E6011), 'me ba ntse ba ka qoba liphoso tsa weld joalo ka ho hloka fusion. .Ho eketsoa ha lintho tse kang phofo ea tšepe, manganese le silicon ho li-electrode tsena ho fana ka melemo e ikhethang, ho kenyelletsa (empa e sa felle ho) bokhoni ba ho atleha ho cheselletsa litšila, litšila kapa sekala sa leloala.
Arc e ntle e qala le ho tsosolosa, e thusang ho felisa litaba tse kang porosity qalong ea weld, ke molemo o eketsehileng oa li-electrode tsa thupa tsa E7018.Bakeng sa lithibelo tse ntle (ho qala arc hape), ho hlokahala hore u qale ho tlosa deposit ea silicon e hlahang qetellong ea electrode.Leha ho le joalo, ho bohlokoa ho netefatsa litlhokahalo tsohle pele ho tjheseletsa, kaha likhoutu kapa mekhoa e meng ha e lumelle ho thibeloa ha li-electrode tsa lithupa.
Joalokaha ho boletsoe sehlopheng sa bona sa AWS, li-electrode tsa lithupa tsa E7018 li fana ka bonyane ba matla a 70,000 psi tensile (a khethiloeng ke "70") 'me a ka sebelisoa libakeng tsohle tsa ho cheselletsa (tse khethiloeng ke "1")."8" e bolela ho roala ha haedrojene e tlaase, hammoho le ho kenella ka hare ho motlakase o fanang ka eona le mefuta ea hona joale e hlokahalang bakeng sa ts'ebetso.Hammoho le maemo a tloaelehileng a AWS, li-electrode tsa lithupa tsa E7018 li ka ba le liqapi tse ling tse kang "H4" le "H8" tse bolelang palo ea hydrogen e sa khoneheng eo tšepe e kenyang tšepe ka har'a weld.Ho etsa mohlala, lebitso la H4 le bontša hore weld deposit e na le 4 ml kapa ka tlase ho hydrogen e ka senyehang ka 100 g ea tšepe ea weld.
Li-electrode tse nang le moqapi oa "R" - tse kang E7018 H4R - li 'nile tsa etsoa liteko tse khethehileng' me li 'nile tsa nkoa e le tse thibelang mongobo ke moetsi.Ho fumana lebitso lena, sehlahisoa se tlameha ho hanela mongobo ka har'a sebaka se fanoeng ka mor'a ho pepesehela mocheso oa 80 deg F le karolo ea 80 lekholong ea mongobo ka lihora tse robong.
Qetellong, ts'ebeliso ea "-1" ho sehlopha sa li-electrode tsa thupa (mohlala, E7018-1) e bolela hore sehlahisoa se fana ka matla a matla a ts'ebetso ho thusa ho hanela ho qhekella lits'ebetsong tse mahlonoko kapa mocheso o tlase.
Li-electrode tsa thupa tse tlase tsa haedrojene tsa E7018 li ka sebetsa ka mohloli oa matla o lulang o le teng (CC) o fanang ka motlakase o mong (AC) kapa o tobileng hona joale oa electrode positive (DCEP).Litšepe tsa E7018 li na le li-arc stabilizers tse eketsehileng le/kapa phofo ea tšepe ka har'a coating ho thusa ho boloka arc e tsitsitseng ha ho tjheseletsa ho sebelisa AC hajoale.Monyetla o ka sehloohong oa ho sebelisa AC e nang le li-electrode tsa E7018 ke ho felisoa ha arc blow, e ka hlahang ha DC welding e sebelisa sebaka se tlase ho feta se loketseng kapa ha ho chesetsoa likarolo tsa makenete.Ho sa tsotellehe ho ba le li-arc stabilizers tse eketsehileng, li-welds tse entsoeng ka AC li ka 'na tsa se ke tsa e-ba bonolo joaloka tse entsoeng ka DC, leha ho le joalo, ka lebaka la liphetoho tse tsoelang pele tsa tataiso ea hona joale tse etsahalang ho fihlela makhetlo a 120 ka motsotsoana.
Ha tjheseletsa ka DCEP hona joale, li-electrode tsena li ka fana ka taolo e bonolo ea arc le bead e ipiletsang haholoanyane, kaha tataiso ea phallo ea hona joale e lula e le teng.Bakeng sa liphetho tse ntle ka ho fetisisa, latela litlhahiso tsa moetsi bakeng sa lisebelisoa tsa ho sebetsa bakeng sa bophara ba electrode.
Joalo ka ts'ebetso efe kapa efe le li-electrode, mokhoa o nepahetseng ha o cheselletsa lithupa ka li-electrode tsa thupa tsa E7018 ke tsa bohlokoa ho netefatsa boleng bo botle ba weld.Tšoara arc bolelele bo tiileng - ka nepo u boloke eleketrode ka holim'a puddle ea weld - ho boloka arc e tsitsitseng le ho fokotsa monyetla oa porosity.
Ha tjheseletsa maemong a bataletseng le tshekaletseng, ntlha / hula eleketrode 5 deg ho 15 deg hole le tataiso ea ho tsamaea ho thusa ho fokotsa monyetla oa ho tšoasa slag ka tjheseletsa.Ha o tjheseletsa o le boemong bo otlolohileng, supa/ sututsa eleketrode ho ya hodimo ho 3 deg ho ya ho di-deg tse 5 ha o ntse o ya hodimo, mme o sebedise mokgwa o monyenyane wa ho loha ho thusa ho thibela weld hore e se ke ya tetebela.The tjheseletsa lifaha bophara e lokela ho hangata makhetlo a mabeli le halofo bophara ba eleketrode ea mantlha terata bakeng sa tjheseletsa bataletseng le tshekaletseng, le tse peli le halofo ho makhetlo a mararo ho ea konokono bophara bophara bakeng sa tjheseletsa lathe-up.
Li-electrode tsa E7018 hangata li romelloa ho tsoa ho moetsi ka har'a sephutheloana se tiisitsoeng ka hermetically ho li sireletsa khahlanong le tšenyo ea mongobo le ho nka.Ho bohlokoa ho boloka sephutheloana seo se tiile 'me se bolokoe sebakeng se hloekileng, se omeletseng ho fihlela lihlahisoa li se li loketse ho sebelisoa.Hang ha e butsoe, li-electrode tsa thupa li lokela ho tšoaroa ka liatlana tse hloekileng, tse omeletseng ho thibela litšila le litšila ho khomarela lesela le ho felisa monyetla oa ho nka mongobo.Li-electrode le tsona li lokela ho tšoaroa ka ontong ka mocheso o khothalletsoang ke moetsi ka mor'a ho buloa.
Likhoutu tse ling li bolela hore na li-electrode tsa thupa li ka ba nako e kae ka ntle ho liphutheloana tse tiisitsoeng kapa ontong ea polokelo le hore na tšepe ea ho tlatsa e ka etsoa hangata hakae (ke hore, ka ho baka ka ho khetheha ho tlosa mongobo o monyehileng) pele e tlameha ho lahloa.Kamehla sheba litlhaloso le likhoutu tse sebetsang bakeng sa litlhoko tsa mosebetsi ka mong.
Nako ea poso: Dec-23-2022