Kusintha kwa PDC

Bmaziko

Polycrystalline diamondi compacts (PDC) zakhala zikugwiritsidwa ntchito mafakitale, kuphatikizapo ntchito pobowola miyala ndi ntchito Machining zitsulo. Ma compact otere awonetsa zabwino kuposa mitundu ina yazinthu zodulira, monga kukana kuvala bwino komanso kukana kukhudzidwa. The PDC akhoza kupangidwa ndi sintering munthu diamondi particles pamodzi pansi pa kuthamanga kwambiri ndi kutentha (HPHT) zinthu, pamaso pa chothandizira / zosungunulira zomwe zimalimbikitsa diamondi-diamondi kugwirizana. Zitsanzo zina za chothandizira/zosungunulira zopangira ma diamondi opangidwa ndi sintered ndi cobalt, faifi tambala, chitsulo, ndi zitsulo zina za Gulu VIII. Ma PDC nthawi zambiri amakhala ndi diamondi yoposa makumi asanu ndi awiri pa zana ndi voliyumu, ndipo pafupifupi makumi asanu ndi atatu pa zana mpaka makumi asanu ndi anayi mphambu zisanu ndi zitatu pa zana ndizofanana. PDC imamangiriridwa ku gawo lapansi, motero imapanga chodulira cha PDC, chomwe nthawi zambiri chimayikidwa mkati, kapena kukwezedwa, chida chotsikirako monga chobowola kapena chowongolera.

Kusintha kwa PDC

Odula a PDC amapangidwa ndi tungsten carbide gawo lapansi ndi ufa wa diamondi pansi pa kutentha kwambiri komanso kuthamanga kwambiri. Cobalt ndi binder. Leaching process imachotsa chothandizira cha cobalt chomwe chimaphatikizapo kapangidwe ka polycrystalline. Zotsatira zake ndi tebulo la diamondi lomwe limatha kukana kuwonongeka kwamafuta komanso kuvala kwa abrasive, zomwe zimapangitsa moyo wautali wothandiza wodula.. Izi nthawi zambiri zimatha maola opitilira 10 pansi pa madigiri 500 mpaka 600 ndi ng'anjo ya vacuum. Cholinga cha leached ndikulimbikitsa kulimba kwa PDC. Nthawi zambiri, gawo lamafuta PDC limagwiritsa ntchito ukadaulo uwu, chifukwa malo ogwirira ntchito amafuta ndi ovuta kwambiri.

MwachiduleMbiri

M'zaka za m'ma 1980, onse a GE Company (USA) ndi Sumitomo Company (Japan) adaphunzira kuchotsa cobalt pamalo ogwirira ntchito a mano a PDC kuti mano agwire bwino ntchito. Koma sanapeze chipambano chamalonda. Tekinoloje idapangidwanso ndikuvomerezedwa ndi Hycalog（USA）. Zinatsimikiziridwa kuti ngati zitsulo zachitsulo zingathe kuchotsedwa pamtengo wambewu, kukhazikika kwa kutentha kwa mano a PDC kudzakhala bwino kwambiri kotero kuti pang'onopang'ono akhoza kubowola bwino muzinthu zolimba komanso zowonongeka. Ukadaulo wochotsa cobaltwu umathandizira kukana kwa mano a PDC m'miyala yolimba kwambiri ndikukulitsa kuchuluka kwa ma PDC bits.