Umqondo we-carbide osikiwe: into eyinhlanganisela ekhiqizwa i-powder metallurgy ehlanganisa inhlanganisela yensimbi ephikisayo (isigaba esiqinile) kanye nensimbi eboshiwe (isigaba esiboshiwe).
I-matrix ye-carbide enosimende iqukethe izingxenye ezimbili: Ingxenye eyodwa yisigaba esiqinile: Enye ingxenye iyinsimbi ebophayo.
Isigaba esiqinile yi-carbide yezinsimbi eziguqukayo kuthebula lezinto ezitholakala ngezikhathi ezithile, njenge-tungsten carbide, i-titanium carbide, i-tantalum carbide, eqinile kakhulu futhi enendawo yokuncibilika engaphezu kuka-2000 ℃, ezinye ngisho nangaphezu kuka-4000 ℃.Ngaphezu kwalokho, i-nitride yensimbi yoguquko, ama-borides, ama-silicides nawo anezakhiwo ezifanayo futhi angasetshenziswa njengezigaba zokuqina ku-carbide enosimende.Ukuba khona kwesigaba esiqinile kunquma ubulukhuni obuphezulu kakhulu nokumelana nokugqoka kwe-alloy.
Izinsimbi ezibophayo ngokuvamile ziyizinsimbi zeqembu lensimbi, ngokuvamile i-cobalt ne-nickel.Ukuze kwenziwe i-carbide enosimende, impushana eluhlaza ikhethwa ngosayizi wezinhlayiyana phakathi kwe-1 ne-2 microns kanye nezinga eliphezulu lokuhlanzeka.Izinto ezingavuthiwe zithathwa ngokwesilinganiso esinqunyiwe sokubunjwa, zengezwe otshwaleni noma kwezinye imidiya emshinini omanzi webhola, ukugaya okumanzi, ukuze zixutshwe ngokugcwele, zichotshozwe, zomiswe, zihlungwe futhi zengezwe ku-wax noma i-gum nezinye izinhlobo zokubumba. ama-agent, bese omiswa, ahlungwe futhi enziwe ingxube.Khona-ke ingxube iyagaywa, icindezelwe, futhi ishiselwe eduze nendawo yokuncibilika yensimbi eboshiwe (1300 ~ 1500℃), isigaba esiqinile kanye nensimbi eboshiwe izokwakha i-eutectic alloy.Ngemuva kokupholisa, isigaba esiqinile sisatshalaliswa ku-lattice eyakhiwe ngensimbi eboshiwe futhi ixhunywe eduze komunye nomunye ukuze yenze yonke into eqinile.Ukuqina kwe-carbide enosimende kuncike esigabeni sokuqina kanye nosayizi wokusanhlamvu, okungukuthi ukuphakama kwesigaba sokuqina kanye nosayizi wokusanhlamvu ocolekile, ubulukhuni bukhulu.Ukuqina kwe-carbide enosimende kunqunywa insimbi ebophayo, futhi ukuphakama kwensimbi ebophezelayo, kuyanda amandla okugoba.
Izici eziyisisekelo ze-carbide enosimende:
1) Ukuqina okuphezulu, ukumelana nokugqoka okuphezulu
2) I-modulus ephezulu yokunwebeka
3) Amandla acindezelayo aphezulu
4) Ukuzinza okuhle kwamakhemikhali (i-asidi, i-alkali, ukumelana ne-oxidation lokushisa eliphezulu)
5)Ukuqina komthelela ophansi
6) I-coefficient ephansi yokunwetshwa, ukuqhutshwa kwe-thermal kanye nogesi okufana nensimbi nama-alloys ayo
Izicelo ze-carbide ezifakwe usimende: amathuluzi esimanjemanje, izinto ezingagqoki, izinga lokushisa eliphezulu nezinto ezimelana nokugqwala.
Izinzuzo zamathuluzi e-carbide (uma kuqhathaniswa nensimbi ye-alloy):
1) Ngokucacile, izikhathi eziningi noma ngisho namakhulu ukuze kuthuthukiswe impilo yamathuluzi.
Impilo yethuluzi lokusika insimbi ingandiswa izikhathi ezingama-5-80, impilo ye-gage yanda izikhathi ezingama-20-150, impilo yesikhunta yanda izikhathi ezingama-50-100.
2) Khulisa isivinini sokusika insimbi kanye nesivinini sokumba i-crust exponentially kanye namashumi ezikhathi.
3) Thuthukisa ukunemba kwe-dimensional kanye nokuqedwa kwangaphezulu kwezingxenye zomshini.
I-4) Kungenzeka ukucubungula izinto ezinzima zomshini ezifana ne-alloy-resistant-alloy, i-alloy esebenzayo kanye ne-iron eqinile eyengeziwe, okunzima ukuyicubungula nge-high-speed steel.
5)Ingenza izingxenye ezithile ezimelana nokugqwala noma ezikwazi ukumelana nokushisa okuphezulu, ngaleyo ndlela ithuthukise ukunemba nokuphila kwemishini ethile namathuluzi.
Izigaba ze-Cemented Carbide:
1. I-WC-Co (i-tungsten drill) uhlobo lwe-alloy: eyakhiwe nge-tungsten carbide ne-cobalt.Ngezinye izikhathi ethuluzini lokusika (ngezinye izikhathi futhi ethuluzini eliholayo) engeza u-2% noma ngaphansi kwenye enye i-carbide (i-tantalum carbide, i-niobium carbide, i-vanadium carbide, njll.) njengezithasiselo.I-cobalt ephezulu: 20-30%, i-cobalt ephakathi: 10-15%, i-cobalt ephansi: 3-8%
2. Ingxubevange yohlobo lwe-WC-TiC-Co(tungsten-iron-cobalt).
Ingxubevange ye-titanium ephansi: 4-6% TiC, 9-15% Co
Ingxube ye-Chin emaphakathi:10-20% TiC, 6-8% Co
Ingxubevange ye-titanium ephezulu: 25-40% TiC, 4-6% Co
3.WC-TiC-TaC(NbC)-Co alloys.
Ingxubevange ye-WC-TiC-Co inokumelana okungcono nokushisa okuphezulu kwe-oxidation kanye nokuphazamiseka okungcono kokushaqeka kokushisa, ngaleyo ndlela ivame ukuba nempilo yamathuluzi ephakeme.I-TiC:5-15%, i-TaC(NbC):2-10%, I-Co:5-15%, enye yonke i-WC.
4. I-carbide eyenziwe ngensimbi: yenziwe nge-tungsten carbide noma i-titanium carbide ne-carbon steel noma i-alloy steel.
5. Ingxubevange ye-Titanium carbide: eyakhiwe ngekhabhoni kune-titanium, insimbi ye-nickel nensimbi ye-molybdenum noma i-molybdenum carbide (MoC).Inani eliphelele le-nickel ne-molybdenum ngokuvamile lingama-20-30%.
I-Carbide ingasetshenziswa ukwenza i-rotary burr, ama-CNC blades, ama-milling cutters, imimese eyindilinga, imimese yokuhlinza, ama-woodworking blades, ama-saw blades, izinduku ze-carbide, njll.
Isikhathi sokuthumela: Jul-07-2023