Carbide da aka yi da siminti an yi shi da ƙarfi mai ƙarfi, carbide ƙarfe mai jujjuyawa (kamar WC, TiC, TaC, NbC, da sauransu) tare da ɗaure ƙarfe (kamar cobalt, nickel, da sauransu) ta hanyar tsarin ƙarfe na foda, a halin yanzu shine mafi girman ƙarfi a duniya. gami, tare da babban taurin (89 ~ 93Hm), babban ƙarfi, zafi mai kyau da sauran halaye.Saboda haka, ana amfani da shi sosai wajen kera ƙwanƙolin buƙatun bincike, gyare-gyare da kayan aiki.Tare da ci gaba da ci gaba da fasaha na fasaha a cikin jagorancin babban sauri da daidaitattun daidaito, taurin, juriya, juriya na nika, daidaitattun nika da yankan ingancin kayan aikin carbide na siminti ana buƙatar su zama mafi girma kuma mafi girma.Girman hatsi na siminti carbide shima ya haɓaka a hankali daga farkon ɓawon hatsi da matsakaici zuwa hatsi mai kyau, ultra-lafiya- hatsi da nanocrystal-grained.
A halin yanzu, ana amfani da carbide mai ƙarancin ƙima a cikin kayan aikin ƙasa da ma'adinai, tambarin mutuwa, hako mai, manyan hammata na sama don samar da lu'u-lu'u na roba, sassan injin jet da sauran filayen;m-grained da matsananci-lafiya-grained ciminti carbide yana da halaye na high taurin da kuma high ƙarfi, shi ne yafi amfani da yi na m carbide kayayyakin aiki, indexable abun da ake sakawa da micro drills.
Tare da gyare-gyaren hatsin WC a cikin siminti carbide, kayan aikin injiniya kamar tauri da ƙarfi sun ƙaru, yayin da kaddarorin kamar raunin karaya ya ragu, kuma aikin niƙa kamar juriya shima ya canza.
Ana amfani da ƙafafu masu girman lu'u lu'u-lu'u daban-daban guda uku don gudanar da gwaje-gwajen niƙa a ƙarƙashin wasu yanayi na niƙa don siminti guda uku tare da girman hatsi daban-daban: m, lafiyayye da ultra-lafiya.Ta hanyar auna ƙarfin sandal, dabaran niƙa da asarar aiki, da machining surface roughness na surface grinder a lokacin da nika tsari, da tasiri na hatsi size canji na WC a cemented carbide a kan nika yi da sakamako kamar nika karfi. nika rabo, da kuma surface roughness ana nazari.
Ta hanyar gwajin, ana iya sanin cewa a ƙarƙashin yanayin, ma'aunin niƙa na mahaɗar ƙasa iri ɗaya ne, ƙarfin niƙa da makamashin da ake cinyewa ta hanyar niƙa simintin simintin siminti mai ɗorewa ya fi na ƙayyadaddun hatsi da ultra-fine. -grained, da kuma nika karfi na surface grinder yana ƙaruwa tare da hawan hatsi.Matsakaicin niƙa na ultra-lafiya cemented carbide yana ƙaruwa tare da haɓakar girman hatsi, yana nuna cewa juriya na irin wannan nau'in simintin carbide yana raguwa tare da haɓakar girman ƙwayar hatsi, da ƙarancin ƙarancin wannan nau'in simintin carbide bayan niƙa mai kyau a ƙarƙashin. yanayin niƙa iri ɗaya yana raguwa tare da haɓaka girman hatsi.
Yin amfani da dabaran niƙa na lu'u-lu'u shine babban hanyar don samar da kayan aikin siminti na siminti, ƙaƙƙarfan nika yana da tasiri mai mahimmanci akan aikin yankewa da rayuwar sabis na kayan aikin carbide da aka yi da siminti, kuma ma'aunin niƙa sune manyan abubuwan da suka shafi yanayin ƙasa. siminti carbide
Samfurin simintin carbide na WC-Co an yi gwajin niƙa akan injin niƙa saman, kuma samfurin ya kasance ƙwaƙƙwaran simintin siminti mai ƙoshin gaske wanda fasahar HIP ta haɗe.
A cikin zurfin guda ɗaya, ƙaƙƙarfan yanayin niƙa na samfurin ya ƙaru tare da haɓaka girman ɓangarorin injin niƙa.Idan aka kwatanta da dabaran niƙa 150#, ƙarancin yanayin niƙa na samfurin ya bambanta kaɗan lokacin da ake niƙa da 280#, yayin da ƙarancin saman yana canzawa yayin niƙa da dabaran niƙa W20.
Lokacin aikawa: Janairu-25-2024