nhau

Synthetic diamond

Dhaimondi grit rinowanzo shandiswa kutsanangura zviyo zvidiki (≈0.00004 in.) zvedhaimondi rekugadzira rinoshandiswa seyakakosha zvinhu zvePDC vanocheka.Panyaya yemakemikari uye zvivakwa, manmade diamond yakafanana nedhaimondi rechisikigo.Kugadzira grit yedhaimani kunosanganisira maitiro akareruka emakemikari: yakajairwa kabhoni inodziiswa pasi pekumanikidza kwakanyanya uye tembiricha.Mukuita, zvisinei, kugadzira dhaimani hakusi nyore.

Makristasi edhaimani ega ega ari mudhaimondi grit ane mativi akasiyana.Izvi zvinoita kuti zvinhu zvisimbe, zvakapinza, uye, nekuda kwekuoma kwedhaimondi ririmo, rinonyanya kupfeka.Muchokwadi, chimiro chisina kujairika chinowanikwa mumadhaimondi akasungirirwa anoita zvirinani mukugera kupfuura madhaimondi echisikigo, nekuti madhaimondi echisikigo makriststals anotsemuka zviri nyore pamiganhu yawo yakarongeka, yecrystalline.

Dhaimondi grit haina kugadzikana pakupisa kwakanyanya kupfuura dhaimondi rechisikigo, zvisinei.Nekuti simbi inokonzeresa yakavharirwa muchimiro chegrit ine mwero wepamusoro wekuwedzera kwemafuta kupfuura madhaimani, mutsauko wekuwedzera unoisa madhaimani-kune-dhaimani mabhondi pasi peshear uye, kana mitoro yakakwira zvakakwana, inokonzeresa kutadza.Kana zvisungo zvikakundikana, madhaimondi anokurumidza kurasika, saka PDC inorasikirwa nekuoma kwayo nekupinza uye inotadza kushanda.Kudzivirira kutadza kwakadaro, PDC cutters inofanirwa kutonhodzwa zvakaringana panguva yekuchera.

Matafura edhaimani

Kugadzira tafura yedhaimondi, grit yedhaimani inosiirwa netungsten carbide uye simbi inosungirirwa kuti igadzire dhaimondi-rakapfuma.Iwo akareba-akafanana muchimiro, uye anofanirwa kugadzirwa akakora sezvaanogona, nekuti vhoriyamu yedhaimani inowedzera hupenyu hwekupfeka.Matafura edhaimani epamusoro-soro ari ≈2 kusvika 4 mm, uye kufambira mberi kwetekinoroji kuchawedzera ukobvu hwetafura yedhaimondi.Tungsten carbide substrates inowanzo ≈0.5 in. yakakwira uye ine yakafanana muchinjiko-chikamu chimiro uye hukuru setafura yedhaimondi.Izvo zvikamu zviviri, tafura yedhaimani uye substrate, inogadzira mucheki (Fig. 4).

Kugadzira PDC kuita zvimiro zvinobatsira kune vanocheka kunosanganisira kuisa grit yedhaimondi, pamwe neiyo substrate, mumudziyo wekumanikidza uye wozonyura pakupisa kwakanyanya uye kumanikidza.

PDC cutters haigoni kubvumirwa kudarika tembiricha ye1,382°F [750°C].Kupisa kwakanyanya kunoburitsa kukurumidza kupera, nekuti mutsauko wekuwedzera kupisa pakati pebhainda nedhaimani kunoda kutyora makristasi edhaimondi ari mukati metafura yedhaimani.Kusimba kwechisungo pakati petafura yedhaimondi uye tungsten carbide substrate zvakare iri mungozi nekusiyanisa kuwedzera kwemafuta.