Inconel 600 (UNS N06600) yog nickel-chromium alloy nrog cov ntsiab lus siab nickel (kwv yees li 72%) thiab cov ntsiab lus chromium (14-17%). Qhov kev sib xyaw no muab kev tiv thaiv zoo rau ntau qhov chaw kub kub corrosive, nrog rau carburizing thiab sulfidizing cua.
Tsis kam rau Carburization
Inconel 600 nthuav tawm zoo carburization tsis kam vim nws cov ntsiab lus nickel siab thiab tsim kom ruaj khov chromium oxide (Cr₂O₃) txheej txheej. Cov ntsiab lus tseem ceeb suav nrog:
Nickel yog ib qho muaj zog austenite stabilizer thiab tsis yooj yim tsim carbides, uas pab tiv thaiv cov pa roj carbon uptake rau hauv matrix.
Chromium tsim ib qho kev tiv thaiv oxide nplai uas ua rau muaj kev cuam tshuam rau cov pa roj carbon diffusion.
Ntawm qhov kub siab tshaj 900℃(1650℃F), oxide nplai yuav tsis ruaj khov, ua rau muaj kev pheej hmoo ntawm carburization nyob rau lub sijhawm ntev.
Nyob rau hauv ib puag ncig zoo carburizing (xws li, siab CO / CO₂ ratios, methane-nplua nuj cua), localized carburization los yog hlau plua plav tuaj yeem tshwm sim yog tias cov oxide txheej puas los yog tsis khaws cia.
Ua rau Sulfidation
Inconel 600 kuj qhia tau zoo sulfidation tsis kam, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig uas muaj cov tshuaj sulfur ib nrab siab. Qhov no yog ntaus nqi t
Kev tsim cov txheej txheem tiv thaiv chromium sulfide (Cr₂S₃), uas inhibits ntxiv sulfur nkag mus.
Nickel muaj qis dua affinity rau sulfur piv rau hlau, txo qhov tsim ntawm brittle sulfides.
Txawm li cas los xij, nyob rau hauv ib puag ncig hnyav sulfidizing (piv txwv li, siab H₂S / SO₂ ratios lossis qis-oxygen ib nrab siab), cov txheej tiv thaiv oxide / sulfide yuav tsis tsim tau zoo, ua rau muaj kev tawm tsam sai.
Ntawm qhov kub siab tshaj 800℃(1470℃F), sulfidation tus nqi nce, thiab cov hlau yuav muaj kev cuam tshuam loj heev yog tias ib puag ncig muaj zog sulfidizing.
Kev txwv thiab kev txiav txim siab
Inconel 600 tsis tiv thaiv carburization lossis sulfidation; nws yog resistant tab sis tsis tag kev tiv thaiv.
Qhov kub thiab txias, lub sij hawm ntev raug, thiab cov roj sib xyaw ua ke tuaj yeem degrade cov txheej txheem tiv thaiv.
Rau cov xwm txheej carburizing los yog sulfidizing tsis tshua muaj, cov alloys nrog ntau dua chromium (xws li, Inconel 601) los yog txhuas (xws li, Incoloy 800H) yuav muab kev ua tau zoo dua.
Cov ntsiab lus
Inconel 600 muab kev tiv thaiv zoo rau ob qho tib si carburization thiab sulfidation nyob rau hauv feem ntau muaj kev lag luam, tshwj xeeb tshaj yog nyob rau nruab nrab kub. Nws cov ntsiab lus siab nickel thiab chromium pab tsim cov txheej txheem tiv thaiv oxide / sulfide ruaj khov, tab sis kev ua tau zoo txo qis ntawm qhov kub thiab txias los yog nyob rau hauv ib puag ncig hnyav heev.
