Ekusikeni kwensimbi, ithuluzi lokusika belilokhu libizwa ngokuthi amazinyo okukhiqiza izimboni, futhi ukusebenza kokusika kwethuluzi lokusika kungenye yezinto ezibalulekile ezinquma ukusebenza kahle kokukhiqiza, izindleko zokukhiqiza kanye nekhwalithi yokucubungula. Ngakho-ke, ukukhetha okufanele kwezinto zamathuluzi okusika kubalulekile.
Impahla yamathuluzi ibhekisela kumpahla yengxenye yokusika yethuluzi.
Ikakhulukazi, ukukhetha okufanele kwezinto zamathuluzi kuthinta izici ezilandelayo:
Ukukhiqiza ngomshini, ukuqina kwamathuluzi, ukusetshenziswa kwamathuluzi nezindleko zomshini, ukunemba komshini kanye nekhwalithi yendawo.
Ngokuvamile kukholakala ukuthi izinto zamathuluzi zifaka insimbi yensimbi ye-carbon, insimbi yensimbi ye-alloy, insimbi enesivinini esikhulu, i-hard alloy, i-ceramics, i-cermets, idayimane, i-cubic boron nitride, njll.
I-Cermet iyinhlanganisela yezinto
Cermet
Igama lesiNgisi elithi cermet elithi cermet noma i-ceramet lakhiwe nge-ceramic (ceramic) nensimbi (insimbi). I-Cermet iwuhlobo lwezinto eziyinhlanganisela, futhi incazelo yayo ihluke kancane ezikhathini ezihlukene.
(1) Ezinye zichazwa njengezinto ezakhiwe ngezitsha zobumba nezinsimbi, noma izinto eziyinhlanganisela yobumba nezinsimbi ezenziwe ngempushana yensimbi.
I-American ASTM Professional Committee ikuchaza ngokuthi: i-heterogeneous composite material eyakhiwe ngensimbi noma i-alloy kanye nesigaba esisodwa noma ngaphezulu se-ceramic, esokugcina esithatha cishe u-15% kuya ku-85% wengxenye yevolumu, kanye nezinga lokushisa lokulungiselela, Ukuncibilika phakathi izigaba zensimbi neze-ceramic zincane kakhulu.
Izinto ezenziwe ngensimbi ne-ceramic raw materials zinenzuzo ethile kokubili kwensimbi kanye ne-ceramics, njengokuqina nokumelana nokugoba kwangaphambili, nokumelana nokushisa okuphezulu, amandla aphezulu kanye nokumelana ne-oxidation yakamuva.
(2) I-Cermet iyi-carbide enosimende enezinhlayiya eziqinile ezisekelwe ku-titanium njengomzimba oyinhloko. Igama lesiNgisi elithi cermet, cermet, liyinhlanganisela yamagama amabili obumba (ceramic) kanye nensimbi (insimbi). I-Ti(C,N) inyusa ukumelana nokugqokwa kwebanga, isigaba esiqinile sesibili sinyusa ukumelana nokuguqulwa kwepulasitiki, futhi okuqukethwe kwe-cobalt kulawula ukuqina. Ama-Cermets akhulisa ukumelana nokugqoka futhi anciphisa ukuthambekela kokunamathela kucwecwe lokusebenza uma kuqhathaniswa ne-sintered carbide.
Ngakolunye uhlangothi, iphinde ibe namandla aphansi okucindezelayo kanye nokumelana nokushaqeka okushisayo okushisayo. Ama-cermets ahlukile kuma-alloys aqinile ngoba izingxenye zawo eziqinile zingezohlelo lwe-WC. Ama-cermets akhiwa ikakhulukazi ama-Ti-based carbides nama-nitrides, futhi abizwa nangokuthi ama-Ti-based cemented carbides.
Ama-cermets ajwayelekile ahlanganisa ama-alloys ahlanganisiwe aphikisayo, ama-alloys aqinile, nezinto zamathuluzi edayimane eziboshwe ngensimbi. Isigaba se-ceramic kuma-cermets siyinhlanganisela ye-oxide noma ephikisayo enephuzu elincibilikayo eliphezulu nobulukhuni obuphezulu, futhi isigaba sensimbi ngokuyinhloko siyizici zokuguquka kanye nama-alloys azo.
I-Cermet iwuhlobo lwezinto eziyinhlanganisela, futhi incazelo yayo ihluke kancane ezikhathini ezihlukene.
Ama-Cermets angamathuluzi okusika insimbi
impahla ebalulekile
Ama-Cermets ayathuthukiswa
Ngokuvamile kukholakala ukuthi izinto zamathuluzi zihlanganisa insimbi yamathuluzi e-carbon, insimbi yensimbi ye-alloy, insimbi enesivinini esikhulu, i-carbide enosimende, i-cermet, i-ceramics, idayimane, i-cubic boron nitride, njll.
Ngawo-1950s, ama-cermets e-TiC-Mo-Ni aqala ukusetshenziswa njengamathuluzi okusika insimbi enesivinini esikhulu.
Ekuqaleni ama-cermets ahlanganiswa kusuka ku-TiC kanye ne-nickel. Nakuba inamandla aphakeme nobulukhuni obuphakeme obuqhathaniswa ne-carbide esimende, ukuqina kwayo akubonanga kahle.
Ngawo-1970, ama-cermets asekelwe e-TiC-TiN, ama-cermets angenayo i-nickel athuthukiswa.
Le cermet yesimanje, enezinhlayiya ze-titanium carbonitride Ti(C,N) njengengxenye eyinhloko, inani elincane lesigaba sesibili esiqinile (Ti,Nb,W)(C,N) kanye ne-tungsten-cobalt-rich binder, ithuthukisa insimbi. ukuqina kwezitsha zobumba kwathuthukisa ukusebenza kwazo kokusika, futhi kusukela lapho ama-cermets asetshenziswa kakhulu ekuthuthukisweni kwamathuluzi.
Ngokumelana nokushisa okuhle kakhulu, ukumelana nokugqoka nokuzinza kwamakhemikhali, amathuluzi e-cermet abonise izinzuzo ezingenakuqhathaniswa emkhakheni wokusika ngesivinini esikhulu nokusika izinto ezinzima zomshini.
I-Cermet + PVD coating ithuthukisa ukumelana nokugqoka
esizayo
Ukusetshenziswa kwemimese ye-cermet emikhakheni ehlukahlukene kuyanda usuku nosuku, futhi akungabazeki ukuthi imboni ye-cermet material izothuthukiswa.
Ama-Cermets angabuye ahlanganiswe ne-PVD ukuze kuthuthukiswe ukumelana nokugqoka.
Isikhathi sokuthumela: Feb-08-2023
