Mokhoa oa ho etsa lihlahisoa tsa carbide

Mokhoa oa ho etsa li-blades tsa carbide tse entsoeng ka samente ha o tšoane le ho lahla kapa tšepe, e entsoeng ka ho qhibiliha ha ore ebe e kenngoa ka har'a hlobo, kapa ho etsoa ka ho forging, empa phofo ea carbide (tungsten carbide powder, titanium carbide powder, tantalum carbide powder) e tla feela. qhibiliha ha e fihla ho 3000 °C kapa ho feta. phofo, joalo-joalo) e futhumatsoa ho feta likhato tse 1,000 tsa Celsius ho etsa hore e chesoe. Ho etsa hore tlamo ena ea carbide e be matla, phofo ea cobalt e sebelisoa e le ntho e tlamang. Tlas'a ketso ea mocheso o phahameng le khatello e phahameng, kamano pakeng tsa carbide le phofo ea cobalt e tla ntlafatsoa, ​​e le hore e tla theha butle-butle. Ketsahalo ena e bitsoa sintering. Kaha ho sebelisoa phofo, mokhoa ona o bitsoa phofo ea metallurgy.

Ho ea ka mekhoa e fapaneng ea tlhahiso ea li-carbide tse kentsoeng ka samente, karolo e boima ea karolo e 'ngoe le e 'ngoe ea carbide e kentsoeng e fapane, 'me le ts'ebetso ea li-carbide tse entsoeng ka samente li fapane.

Sintering e etsoa ka mor'a ho theha. E latelang ke ts'ebetso eohle ea ts'ebetso ea sintering:

1) Tobetsa phofo ea tungsten carbide e hahiloeng hantle haholo le phofo ea cobalt ho latela sebopeho se hlokahalang. Ka nako ena, likaroloana tsa tšepe li kopantsoe, empa motsoako ha o thata haholo, 'me o tla sithabetsoa ka matla a seng makae.

2) Ha mocheso oa likaroloana tse entsoeng ka phofo li ntse li eketseha, tekanyo ea ho hokahanya e matlafatsoa butle-butle. Ka 700-800 ° C, motsoako oa likaroloana o ntse o fokola haholo, 'me ho ntse ho e-na le likheo tse ngata pakeng tsa likaroloana, tse ka bonoang hohle. Li-voids tsena li bitsoa voids.

3) Ha mocheso o futhumatsang o nyolohela ho 900 ~ 1000 ° C, likheo pakeng tsa likaroloana li fokotseha, karolo e ntšo e nang le mela e batla e nyamela, 'me ho sala karolo e kholo feela e ntšo.

4) Ha mocheso o ntse o atamela butle-butle 1100 ~ 1300 ° C (ke hore, mocheso o tloaelehileng oa sintering), li-voids li fokotseha ka ho eketsehileng, 'me maqhama pakeng tsa likaroloana a ba matla.

5) Ha ts'ebetso ea sintering e phethiloe, likaroloana tsa tungsten carbide ka lehare ke li-polygone tse nyenyane, 'me ntho e tšoeu e ka bonoa ho pota-pota, e leng cobalt. Sebopeho sa lehare la sintered se thehiloe holim'a cobalt 'me se koahetsoe ka likaroloana tsa tungsten carbide. Boholo le sebōpeho sa likaroloana le botenya ba lera la cobalt li fapana haholo ka thepa ea ho kenya carbide.