Mafotokozedwe Aukadaulo ndi Kugwiritsa Ntchito Ma Electrode a Nickel Base

Ma Electrode Oyambira a Nikelikuyimira gulu lapadera la zinthu zogwiritsidwa ntchito zowotcherera zomwe zimapangidwa kuti zigwirizane ndi ma alloys apamwamba komanso zitsulo zosiyana. Mtundu wa Ni327-3 (AWS A5.11 ENiCrMo-3) uli ndi chophimba cha sodium chochepa cha hydrogen ndipo umagwira ntchito pa DCEP (Direct Current Electrode Positive) polarity. Electrode iyi imapanga chitsulo chosungidwa chokhala ndi pulasitiki yabwino kwambiri, kulimba, komanso kukana ming'alu, kusunga mphamvu yayikulu komanso kukana dzimbiri bwino m'chipinda komanso kutentha kwakukulu. Kapangidwe kake ka mankhwala kamatsimikizira magwiridwe antchito odalirika m'malo ovuta kumene ma electrodes wamba angalephere.

Kapangidwe ka zitsulo ka ma electrode awa kamapangitsa kuti akhale oyenera kwambiri kuwotcherera ma alloy a nickel-chromium-molybdenum. Chitsulo chomwe chili mu chosungiramo nthawi zambiri chimakhala ndi nickel pafupifupi 55%, 20-23% chromium, ndi 8-10% molybdenum, zomwe zimapangitsa kuti chikhale cholimba chomwe chimalimbana ndi dzimbiri zosiyanasiyana kuphatikizapo kusweka kwa dzenje ndi kupsinjika kwa dzimbiri. Kapangidwe ka makina kamaphatikizapo mphamvu yokoka yoposa 760 MPa ndi kuchuluka kwa kutalika kopitilira 27%, kuonetsetsa kuti cholumikiziracho chili ndi mphamvu komanso kusinthasintha.

Ntchito zamafakitale zaMa Electrode Oyambira a NikelAmagwiritsidwa ntchito kwambiri polumikiza zitsulo zosiyanasiyana komanso polumikiza zitsulo pamwamba pa zitsulo za kaboni, kupanga magetsi, ndi uinjiniya wa m'madzi. Amagwiritsidwa ntchito kwambiri polumikiza zitsulo zofunika kwambiri monga ma reactor, zosinthira kutentha, ndi mapaipi omwe amagwira ntchito kutentha kwambiri komanso zinthu zowononga. Ma electrode amasonyeza bwino kwambiri polumikiza zitsulo zosiyana komanso polumikiza pamwamba pa zitsulo za kaboni, zomwe zimapangitsa kuti pakhale zabwino zachuma komanso zaukadaulo popanga ndi kukonza zida.

Kusamalira bwino ndi njira zowotcherera ndizofunikira kwambiri kuti ma electrode awa agwire bwino ntchito. Kuumitsa pasadakhale pa madigiri 300°C kwa mphindi 60 ndi bwino kuti muchepetse chinyezi ndikupewa mavuto okhudzana ndi haidrojeni. Ogwiritsa ntchito ayenera kusunga kutalika kwa arc kochepa komanso kutentha pang'ono kuti asunge mawonekedwe a zitsulo zachitsulo chosungidwacho. Kutentha kwa interpass kuyenera kulamulidwa pansi pa 150°C, ndi kuyeretsa bwino pakati pa njira zodutsa ndikofunikira kuti zitsimikizire kuti ma welds alibe chilema komanso kuti asagwere dzimbiri.

Ma Electrode Oyambira a Nikelimapereka mayankho ofunikira pa ntchito zovuta zowotcherera m'mafakitale osiyanasiyana. Mtundu wa Ni327-3, womwe umakwaniritsa zofunikira za AWS ENiCrMo-3, umapereka magwiridwe antchito odalirika kudzera mu kuphatikiza kwake koyenera kwa mphamvu zamakanika komanso kukana dzimbiri. Ma electrode awa akupitilizabe kugwira ntchito ngati zigawo zofunika kwambiri pakusamalira ndi kumanga zida zamafakitale zomwe zimagwira ntchito pansi pa nyengo yovuta kwambiri.