Yumbu mai jure lalacewa na aluminawani kayan gini ne na masana'antu na yumbu wanda aka yi shi da alumina mai tsafta (Al₂O₃). Ya zama muhimmin abu don magance mummunan lalacewa, tsatsa, da yanayin zafi mai yawa saboda taurinsa na musamman, juriyar sawa, da kwanciyar hankali na sinadarai. Idan aka kwatanta da kayan gargajiya masu jure wa ƙarfe, yana tsawaita rayuwar sabis na kayan aiki sosai kuma yana rage yawan kulawa da farashi a fannoni da dama na masana'antu, yana aiki a matsayin mafita mai mahimmanci ga masana'antu tun daga makamashi da ƙarfe zuwa masana'antu masu inganci.
Babban aikinta ya dogara ne akan ainihin bayanan jiki da sinadarai. Taurin Rockwell (HRA) na yumbun alumina zai iya kaiwa 80-90, tare da ƙarfin matsi wanda ya wuce 850 MPa. Gwaje-gwajen ƙwararru sun nuna cewa juriyar lalacewa ta ninka ta ƙarfe manganese sau 266 da kuma sau 171.5 na ƙarfe mai yawan chromium. Dangane da juriyar zafin jiki, zafin aikinsa na dogon lokaci zai iya kaiwa 300°C, kuma yana iya jure tsatsa ta acid da alkali a cikin kewayon pH na 3 zuwa 12. Waɗannan halaye suna ba shi damar yin aiki da kyau a cikin yanayi mai ƙarfi, lalacewa mai yawa, da lalata, misali, yana tsawaita rayuwar aikin foda na kwal da ke jigilar bututun da ya wuce sau 10.
Aikin yumbu mai jure lalacewa yana amfana daga sarrafa cikakken tsarin gaba ɗaya daga kayan aiki zuwa sintering. Da farko, foda mai ɗanyen alumina yana yin niƙa mai kyau, tare da girman barbashi yawanci ana sarrafa shi ƙasa da micron 1, yana tabbatar da tsabta da rarraba girman barbashi iri ɗaya. Tsarin ƙirƙirar farko sun haɗa da matse busasshe da matsewa mai isostatic, na ƙarshe yana ba da ƙarin yawan iri ɗaya ga jikin kore. A ƙarshe, jikin kore yana nitsewa a kusan 1700°C, yana samar da tsari mai yawa na microcrystalline, tare da yawan abu ya kai sama da 95%. Tsarin haɗaka, kamar ƙara zirconia (ZrO₂), na iya ƙara haɓaka juriya da taurinsa.
Ana amfani da wannan kayan sosai a fannoni daban-daban na masana'antu. A cikin masana'antun makamashi da kare muhalli, ana amfani da shi a cikin bututun foda na kwal na tashoshin wutar lantarki na zafi, da kuma a cikin masu rarrabawa da kuma mazubin cyclone na masana'antun siminti, wanda ke ƙara tsawon rayuwar kayan aiki da sau 3 zuwa 5. A cikin masana'antun ƙarfe da haƙar ma'adinai, layukan yumbu da aka sanya a cikin bututun allurar kwal da bututun cire ƙura suna tsayayya da hanyoyin da ke da ƙarfi kamar foda na ƙarfe, wanda ke rage farashin kulawa na shekara-shekara har zuwa 60%. Bugu da ƙari, ana amfani da tsarkakken alumina mai matuƙar ƙarfi (misali, 99.7%) kuma a cikin manyan fannoni na masana'antu kamar polishing na semiconductor wafer.
Lokacin Saƙo: Disamba-19-2025