Cov hlau vuam electrodes hardfacing sawv cev rau ib pawg tshwj xeeb ntawm cov khoom siv vuam uas tsim los rau kev tiv thaiv qhov chaw thiab kev kho dua tshiab ntawm cov khoom. Lub Ni307-2 electrode, ua raws li AWS A5.11 ENiCrFe-2 kev faib tawm, ua piv txwv rau pawg no los ntawm nws cov khoom sib xyaw nickel-base thiab cov yam ntxwv tshwj xeeb. Lub electrode no muaj cov txheej txheem sodium-hydrogen tsawg thiab ua haujlwm ntawm DCEP (Direct Current Electrode Positive) polarity, ua rau nws tsim nyog rau cov ntawv thov uas xav tau cov yam ntxwv tswj kev tso tawm thiab cov ntsiab lus hydrogen tsawg kawg nkaus. Cov khoom no tso nws ua qhov kev daws teeb meem rau ntau yam xwm txheej kev saib xyuas kev lag luam.
Lub hauv paus ntawm qhov novuam electrodes hardfacingCov khoom no yog ua los ntawm cov hlau nickel-chromium-iron alloy system. Cov hlau no muaj cov khoom sib npaug zoo xws li kev tiv taus corrosion thiab oxidation zoo, nrog rau kev tswj lub zog ntawm qhov kub siab. Lub hauv paus nickel-base muaj kev tawv zoo dua piv rau cov hlau electrodes ib txwm muaj, txo qhov kev cuam tshuam rau kev tawg hauv qab kev ntxhov siab thermal. Qhov sib npaug ntawm cov hlau tshwj xeeb ua kom muaj kev sib raug zoo nrog ntau yam khoom siv hauv paus thaum xa cov khoom nto xav tau.
Ib qho tseem ceeb ntawm qhov novuam electrodes hardfacingcov khoom siv yog nws cov txheej txheem txheej txheem sodium-hydrogen tsawg. Hom txheej txheem no ua rau cov hydrogen hauv cov hlau tso tawm tsawg dua, yog li txo qhov kev pheej hmoo ntawm hydrogen-induced cracking hauv txheej hardfacing. Cov txheej txheem kuj tseem pab txhawb rau cov yam ntxwv arc ruaj khov, kev hloov pauv hlau du, thiab kev sib cais slag zoo. Qhov yuav tsum tau rau DCEP polarity ua kom muaj kev ruaj khov arc thiab cov yam ntxwv nkag mus thaum ua kom zoo dua qhov kev tso tawm thaum lub sijhawm vuam.
Cov kev ua haujlwm ntawm cov khoom siv vuam electrodes hardfacing no suav nrog cov yam ntxwv tswj kev tso tawm thiab kev ua haujlwm vuam uas tswj tau. Cov electrodes tau tsim los tsim cov khoom ntim zoo, zoo nrog tsawg kawg nkaus spatter thiab tswj cov hlaws profile. Cov hlau vuam uas tau txais tuaj yeem ua haujlwm siv cov txheej txheem ib txwm muaj, tso cai rau kev hloov kho qhov ntev thiab qhov tiav ntawm qhov chaw thaum xav tau. Cov yam ntxwv no ua rau lub electrode haum rau cov ntawv thov uas ob qho tib si kev ua tau zoo ntawm cov txheej hardfaced thiab nws qhov xwm txheej kawg ntawm qhov chaw yog qhov tseem ceeb.
Hauv kev siv ua haujlwm, cov nickel-base novuam electrodes hardfacingCov ntaub ntawv ua haujlwm kho cov khoom thiab tiv thaiv qhov chaw ntawm ntau yam kev lag luam. Cov ntawv thov feem ntau suav nrog kev rov tsim cov khoom siv uas hnav lawm uas ua haujlwm hauv qhov chaw kub siab, koom nrog cov hlau sib txawv nrog cov yam ntxwv sib txawv ntawm kev nthuav dav thermal, thiab npog cov chaw uas xav tau kev tiv thaiv corrosion nrog rau lub zog kho tshuab. Cov yam ntxwv kev siv tshuab thiab cov yam ntxwv kev ua tau zoo ua rau cov electrodes no siv tau rau hauv kev saib xyuas thiab kev tsim khoom uas xav tau kev tiv thaiv qhov chaw ruaj khov thiab kev kho cov khoom.
Lub sijhawm tshaj tawm: Lub Kaum Hli-14-2025