Mabapi le Cemented Carbide (I)

1.Karolo e ka Sehloohong ea Cemented Carbide
Carbide e entsoeng ka samente e entsoe ka boima bo phahameng, "refractory metal carbide" (WC, TiC) micron powder e le karolo e ka sehloohong, e nang le cobalt (Co), nickel (Ni), le molybdenum (Mo) e le tlamahano. E ka sebelisoa ka sebōping sa vacuum kapa lihlahisoa tsa metallurgy tsa hydrogen Powder tse kentsoeng ka sebōping sa phokotso.
Ka mohlala:
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2.The Compose of the substrates of samente carbide
Li-substrates tsa carbide tse entsoeng ka samente li entsoe ka likarolo tse peli: karolo e 'ngoe ke mohato o thata,' me karolo e 'ngoe ke tšepe e kopanyang.
Karolo e thata ke carbide ea litšepe tsa phetoho tafoleng ea nakoana, joalo ka tungsten carbide, titanium carbide, le tantalum carbide. Ho thatafala ha tsona ho phahame haholo, 'me lintlha tsa tsona tse qhibilihang li ka holimo ho 2000°C,' me tse ling li bile li feta 4000°C. Ho feta moo, li-nitride tsa tšepe tsa transition, li-boride le li-silicide li na le litšobotsi tse tšoanang 'me li ka sebetsa e le mekhahlelo e thata ho carbide e entsoeng ka samente. Ho ba teng ha mohato o thata ho etsa hore alloy e be le boima bo phahameng haholo le ho hanyetsa.
Hangata tšepe e kopanyang ke tšepe ea sehlopha sa tšepe, 'me cobalt le nickel li sebelisoa hangata.

3.Kamoo karolo e 'ngoe le e 'ngoe e sebetsang ka eona tlhahisong
Ha ho etsoa carbide e entsoeng ka samente, boholo ba karoloana ea phofo e tala e khethiloeng ke fektheri e entsoeng ka samente e pakeng tsa 1 le 2 microns, 'me bohloeki bo phahame haholo. Lisebelisoa tse tala li kopantsoe ho ea ka karolelano e boletsoeng ea sebopeho, 'me joala kapa mokhoa o mong o kenngoa ho sila ka metsi ka leloala la bolo e metsi ho etsa hore li kopane ka ho feletseng le ho pshatleha. Ka mor'a ho omisa le ho sefa, ho eketsoa ntho e bōpang e kang boka kapa sekhomaretsi. Motsoako o fumanoa ka ho sefa. Joale, ha motsoako o le granulated le ho hatelloa, 'me o halefile ho haufi le ho qhibiliha ha tšepe ea binder (1300-1500 ° C), mohato o thata le tšepe ea binder e tla etsa motsoako oa eutectic. Ka mor'a ho pholile, karolo e thata e ajoa ka har'a marang-rang e entsoeng ka tšepe ea ho kopanya, 'me e amana haufi-ufi le e mong ho etsa ntho e tiileng. Ho thatafala ha carbide e entsoeng ka samente ho itšetlehile ka likarolo tse thata tsa karolo le boholo ba lijo-thollo, ke hore, ho phahama ha karolo e thata le ho feta lijo-thollo, ho ba le boima bo boholo. Ho tiea ha carbide e entsoeng ka samente ho khethoa ke tšepe ea bond. Ha litaba tsa tšepe ea bond li phahame, ho na le matla a maholo a ho koba.


Nako ea poso: Mar-15-2021