Mayelana ne-Cemented Carbide (I)

1.Ingxenye Eyinhloko Ye-Cemented Carbide
I-carbide enosimende yenziwe ngobulukhuni obuphezulu, i-refractory metal carbide (WC, TiC) micron powder njengengxenye eyinhloko, ene-cobalt (Co), nickel (Ni), ne-molybdenum (Mo) njengesibophezelo. Ingasetshenziswa esithandweni somlilo noma imikhiqizo ye-hydrogen Powder metallurgy efakwe esithandweni sokunciphisa.
Ngokwesibonelo:
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2.Ukwakhiwa kwama-substrates e-carbide enosimende
Ama-substrates e-carbide enosimende akhiwe izingxenye ezimbili: ingxenye eyodwa yisigaba sokuqina, kanti enye ingxenye iyinsimbi yokubopha.
Isigaba esiqinile yi-carbide yezinsimbi eziguqukayo kuthebula le-periodic, njenge-tungsten carbide, i-titanium carbide, ne-tantalum carbide. Ukuqina kwazo kuphakeme kakhulu, futhi izindawo zazo zokuncibilika zingaphezu kuka-2000°C, kanti ezinye zize zedlule ku-4000°C. Ngaphezu kwalokho, i-transition metal nitrides, i-borides, nama-silicides anezici ezifanayo futhi angasebenza njengezigaba zokuqina ku-carbide enosimende. Ukuba khona kwesigaba sokuqina kunquma ukuthi i-alloy inobunzima obuphezulu kakhulu kanye nokumelana nokugqoka.
Insimbi ebophayo ngokuvamile iyinsimbi yeqembu, futhi i-cobalt ne-nickel zivame ukusetshenziswa.

3.Indlela ingxenye ngayinye esebenza ngayo ekukhiqizeni
Lapho kukhiqizwa i-carbide enosimende, usayizi wezinhlayiyana zempushana eluhlaza ekhethwe ifektri ye-carbide enosimende iphakathi kwama-microns angu-1 no-2, futhi ubumsulwa buphezulu kakhulu. Izinto ezisetshenziswayo zixubene ngokwesilinganiso esibekiwe sokubunjwa, bese kuthi utshwala noma enye i-medium yengezwe ekugayeni okumanzi esigayweni sebhola elimanzi ukuze kuhlanganiswe ngokuphelele futhi kugaywe. Ngemuva kokumisa nokuhlunga, i-ejenti yokubumba efana ne-wax noma i-glue yengezwa. Ingxube itholakala ngokusefa. Khona-ke, lapho ingxube ihlutshiwe futhi icindezelwe, futhi ishisiswe ukuze ivale indawo yokuncibilika yensimbi ye-binder (1300-1500 ° C), isigaba esiqinile kanye nensimbi yokubopha izokwakha i-eutectic alloy. Ngemuva kokupholisa, isigaba esiqinile sisatshalaliswa kugridi eyakhiwe ngensimbi yokubopha, futhi ixhumeke eduze komunye nomunye ukuze yakhe yonke into eqinile. Ukuqina kwe-carbide kasimende kuncike engqikithini yesigaba esiqinile kanye nosayizi wokusanhlamvu, okungukuthi, ukuphakama kwesigaba esiqinile kanye nokucoleka kwezinhlamvu, kukhulu ukuqina. Ukuqina kwe-carbide enosimende kunqunywa insimbi yebhondi. Ukuphakama kokuqukethwe kwensimbi yebhondi, kuyanda amandla okugoba.


Isikhathi sokuthumela: Mar-15-2021