Ma Electrode Osenda Hardfacing: Aloyi Yochokera ku Nikeli Yoteteza Pamwamba

Ma electrode omangira zitsulo zolimba amaimira gulu lapadera la zinthu zogwiritsidwa ntchito zomangira zitsulo zomwe zimapangidwa kuti ziteteze pamwamba ndi kubwezeretsa zigawo. Ma electrode a Ni307-2, omwe amagwirizana ndi gulu la AWS A5.11 ENiCrFe-2, akuwonetsa gululi kudzera mu kapangidwe kake ka nickel-base ndi makhalidwe ake apadera aukadaulo. Ma electrode awa ali ndi njira yophikira ya sodium yochepa ya hydrogen ndipo amagwira ntchito pa DCEP (Direct Current Electrode Positive), zomwe zimapangitsa kuti ikhale yoyenera kugwiritsidwa ntchito pomwe makhalidwe olamulidwa ndi kuchuluka kwa hydrogen kochepa amafunika. Makhalidwe amenewa amaika ngati yankho lothandiza pazochitika zosiyanasiyana zosamalira mafakitale.

Mapangidwe oyambira a izima electrode owotcherera olimbaChogulitsachi chimachokera ku dongosolo la aloyi wa nickel-chromium-iron. Kuphatikiza kwachitsulo kumeneku kumapereka zinthu zoyenera kuphatikiza kukana dzimbiri ndi okosijeni, komanso mphamvu yokhazikika pa kutentha kwakukulu. Maziko a nickel-base amapereka kulimba kwapamwamba poyerekeza ndi ma electrode achikhalidwe opangidwa ndi chitsulo, zomwe zimachepetsa kuthekera kwa ming'alu pansi pa kutentha. Kulinganiza kwa aloyi yeniyeni kumatsimikizira kuti ikugwirizana ndi zipangizo zosiyanasiyana zoyambira pamene ikupereka zinthu zofunika pamwamba.

Khalidwe lofunika kwambiri la izima electrode owotcherera olimbaChovalachi chili ndi kapangidwe kake kokhala ndi sodium yochepa ya haidrojeni. Mtundu uwu wa chophimba umachepetsa bwino kuchuluka kwa haidrojeni mu chitsulo chosungidwa, motero umachepetsa chiopsezo cha kusweka kwa haidrojeni komwe kumabwera chifukwa cha chitsulo cholimba. Chophimbachi chimathandizanso kukhala ndi mawonekedwe okhazikika a arc, kusamutsa chitsulo chosalala, komanso kuchotsedwa kwa slag yabwino. Kufunikira kwa DCEP polarity kumatsimikizira kukhazikika kwa arc ndi mawonekedwe olowera pomwe kumawonjezera magwiridwe antchito panthawi yolumikizira.

Magawo ogwirira ntchito a zinthu zomangira ma electrode olumikizirana awa ndi monga mawonekedwe owongolera komanso magwiridwe antchito owongolera. Ma electrodewa apangidwa kuti apange malo okhuthala, apamwamba kwambiri okhala ndi malo ochepa otayira madzi komanso mawonekedwe owongolera a bead. Chitsulo cholumikizira chomwe chimachokeracho chikhoza kupangidwa pogwiritsa ntchito njira zachikhalidwe, zomwe zimathandiza kusintha mawonekedwe ndi kumaliza pamwamba pakafunika kutero. Makhalidwe amenewa amapangitsa kuti electrode ikhale yoyenera kugwiritsidwa ntchito pomwe magwiridwe antchito a gawo lolimba komanso momwe limakhalira pamwamba pake ndizofunikira kwambiri.

Mu ntchito zothandiza, maziko awa a nickelma electrode owotcherera olimbaZipangizozi zimagwira ntchito yokonza zigawo ndi kuteteza pamwamba m'magawo osiyanasiyana a mafakitale. Ntchito zambiri zimaphatikizapo kumanganso zigawo zakale zomwe zimagwira ntchito m'malo otentha kwambiri, kulumikiza zitsulo zosiyana ndi mawonekedwe osiyanasiyana okulitsa kutentha, ndi kuphimba pamwamba zomwe zimafuna kukana dzimbiri pamodzi ndi mphamvu ya makina. Makhalidwe aukadaulo ndi magwiridwe antchito zimapangitsa ma electrode awa kugwiritsidwa ntchito pokonza ndi kupanga zinthu komwe chitetezo cholimba cha pamwamba ndi kubwezeretsa zigawozo zimafunika.