
Ama-superalloy asekelwe ku-cobalt ayikilasi lezinto zensimbi ezisebenza kahle eziklanyelwe ukugcina amandla akhethekile emishini, ukuzinza kwendawo, nokumelana nokugqwala emazingeni okushisa aphakeme kakhulu, ngokuvamile adlula lawo lapho ama-superalloy asekelwe ku-nickel eqala ukuba buthaka. Ziyitshe legumbi lezingxenye ezibalulekile ezindaweni ezidinga kakhulu, ikakhulukazi endaweni yezindiza, izinjini zegesi yezimboni, nezifakelo zezokwelapha.
Ukusebenza kwawo okuphakeme kubangelwa i-cobalt-chromium matrix eqinisiwe kanye nenani eliphakeme lezinhlayiya ze-carbide eziqinile, eziphikisayo.
Amandla Aphakeme Okushisa Okuphakeme: Ama-alloy e-cobalt abonisa amaphuzu aphezulu ancibilikayo kanye nobulukhuni obungcono bokushisa nokumelana nokunwabuzelayo kunama-nickel alloys emazingeni okushisa angaphezu kuka-1000°C (1832°F). Lokhu kusho ukuthi bamelana nokuthamba kanye nokuguqulwa ngaphansi kwengcindezi emazingeni okushisa aseduze nendawo yokuncibilika.
Ukumelana Okuvelele Kokugqoka Nokuqina: Ubulukhuni bawo bemvelo, obuvame ukuthuthukiswa inethiwekhi yama-hard carbides, kunikeza ukumelana okuhle kakhulu nokugqokwa kwe-abrasive, ukunamathela okunamathelayo (i-galling), kanye nokukhathazayo. Lokhu kubenza balungele izinhlelo zokusebenza ezibhekene nokugqoka.
I-Hot Corrosion & Oxidation Resistance Kahle Kakhulu: Okuqukethwe okuphezulu kwe-chromium (ngokuvamile ngaphezu kuka-20%) kwakha isikali se-chromium oxide esivikelayo, esibambelelayo (Cr₂O₃) esimelana nokuwohloka emkhathini we-oxidizing kanye ne-sulfidizing.
I-Superior Thermal Fatigue Resistance: Angakwazi ukumelana nemijikelezo ephindaphindiwe yokushisisa nokupholisa ngaphandle kokuqhekeka, impahla ebalulekile yezingxenye ezifana nama-vane ophephela.
Ukusebenza kwe-cobalt superalloys kutholakala ezindleleni ezimbalwa ezibalulekile:
Ukuqinisa Isixazululo Esiqinile: Izinto ezifana ne-tungsten (W) ne-molybdenum (Mo) zincibilika ku-matrix ye-cobalt, okuvimbela ukunyakaza kokuphuma.
I-Carbide Precipitation: Ukwakheka kwama-carbides aqinile (isb., Cr₇C₃, Cr₂₃C₆, WC, TaC) kuyo yonke i-microstructure kunikeza ukumelana okukhulu nokukhasa nokuguga. Ubukhulu, uhlobo, nokusatshalaliswa kwalawa ma-carbide kubalulekile ekusebenzeni kahle.
I-Cobalt Allotropy: I-Cobalt iba noshintsho lwesigaba lapho kushiswa, futhi lesi sici siyasetshenziswa ukuze kuthuthukiswe izakhiwo ngokwelashwa kokushisa kanye nokucubungula kwe-thermo-mechanical.
Ama-superalloys asuselwa ku-Cobalt abalulekile ezinhlelweni lapho ukwehluleka kungeyona inketho.
I-Aerospace & Power Generation Turbines: Isetshenziselwa izingxenye ezimile ezifana:
I-Turbine Vanes & Nozzle Guide Vanes: Lapho amazinga okushisa egesi aphakeme kakhulu ahlangatshezwana nawo futhi ukumelana nokukhuphuka kubalulekile.
Izingxenye ze-Industrial Wear: Isisekelo se-Stellite™ alloys, esetshenziselwa:
Izihlalo zeValve & Nquma ku-high-pressure, izinga lokushisa eliphezulu.
Izintambo Eziqinile Nezinduku ukuze zimboze izindawo zokuguga ezibucayi kumathuluzi nemishini.
I-Pump Sleeves, Shafts, kanye Nemimese Yokusika.
Izimila Zokwelapha: Zisetshenziswa ekufakweni kwamathambo (ikakhulukazi ezindaweni ezithwala insimbi phezu kwensimbi) ngenxa yokuvumelana kwazo okuhle kakhulu kwe-biocompatibility, ukumelana nokugqoka, kanye nokungagqwali emzimbeni womuntu.
Ithebula elilandelayo lifingqa izici eziyinhloko ukuze uthole ukubuka konke okusheshayo:
| Isici | Incazelo | Inzuzo |
| Isisekelo Esiyisisekelo | I-Cobalt (Co), enokuqukethwe okuphezulu kwe-Chromium (Cr). | Ihlinzeka nge-matrix eyisisekelo yokusebenza kwezinga lokushisa eliphezulu nokumelana nokugqwala. |
| Iziqinisekiso Eziyinhloko | I-Tungsten (W), i-Molybdenum (Mo), ne-Carbon (C) yokwenza i-carbide. | Inikeza amandla ezinga lokushisa eliphezulu, ukumelana nokunyakaza, nokumelana nokugqoka. |
| Izinga Lokushisa Lokusebenza | Iphakeme kakhulu, ihamba phambili ngaphezu kuka-1000°C (1832°F). | Inika amandla amandla enjini aphezulu nokusebenza ezindaweni ezibucayi. |
| Izakhiwo Eziyinhloko | Ukuqina Okushisayo, Ukumelana Ne-Creep, Ukugqokwa Nokumelana Nokugqwala. | Inhlanganisela eyingqayizivele yezimo zesevisi ezinzima kakhulu. |
| Amafomu Ajwayelekile | Izingxenye zokusakaza, ibha/ipuleti elikhandiwe, impushana ye-HIP, ama-alloys aqinile. | Ukukhiqiza okuhlukahlukene kokubili izingxenye eziyinkimbinkimbi zomumo we-net-net kanye nezingubo zokuzivikela. |
| Izimboni Eziyinhloko | I-Aerospace, Power Generation, Medical, Chemical & Petrochemical. | Impahla yokuzikhethela lapho izinga lokushisa elidlulele nokugqoka kuhlangana khona. |
Kafushane, Ama-Superalloys asekelwe ku-Cobalt ziyizinto ezinhle kodwa ezibucayi ezicindezela imingcele yobunjiniyela obusezingeni eliphezulu. Nakuba ngokuvamile ebiza kakhulu futhi eminyene kunama-nickel superalloy, ukusebenza kwawo okungenakuqhathaniswa ezindaweni ezithile-ikakhulukazi amandla okushisa aphezulu kakhulu, ukukhathala okushisayo, nokumelana nokugqoka-kuvikela indima yabo ebalulekile kwezobuchwepheshe obuphambili.