Zida Ziwiri Zofunika Kwambiri za PDC Cutters

PDC cutter ndi mtundu wazinthu zolimba kwambiri zomwe zimaphatikiza diamondi ya polycrystalline yokhala ndi tungsten carbide gawo lapansi pakutentha kopitilira muyeso komanso kuthamanga.

PDC Cutter inapangidwa poyamba ndi General Electric (GE) mu 1971. Odula PDC oyambirira a mafakitale a mafuta ndi gasi adachitidwa mu 1973 ndipo patatha zaka 3 zoyesera ndi kuyesa kumunda, zimatsimikiziridwa kuti ndizothandiza kwambiri kuposa kuphwanya zochita za carbide. mabatani kotero adayambitsidwa malonda mu 1976.

PDC Cutters amapangidwa kuchokera ku tungsten carbide substrate ndi grit ya diamondi yopanga. Dera la diamondi ndi carbide limakula palimodzi kudzera m'magulu amankhwala pansi pa kutentha kwambiri komanso kupanikizika kwambiri.

Zida zofunika kwambiri za odula a PDC ndi grit ya diamondi ndi gawo lapansi la carbide.

1. Dothi la diamondi

Grit ya diamondi ndiye chinthu chofunikira kwambiri kwa ocheka a PDC. Pankhani ya mankhwala ndi katundu, diamondi yopangidwa ndi manmade ndi yofanana ndi diamondi yachilengedwe. Kupanga grit ya diamondi kumaphatikizapo njira yosavuta yopangira mankhwala: mpweya wamba umatenthedwa ndi kuthamanga kwambiri komanso kutentha. Koma m’zochita, kupanga diamondi sikophweka.

Grit ya diamondi imakhala yosakhazikika pakatentha kwambiri kuposa diamondi yachilengedwe, komabe. Chifukwa chothandizira zitsulo chomwe chimatsekeredwa mumagulu a grit chimakhala ndi kuchuluka kwa matenthedwe kuposa diamondi, kukulitsa kosiyana kumayika zomangira za diamondi mpaka diamondi pansi pa shear ndipo, ngati katunduyo ali wokwera mokwanira, zimapangitsa kuti ma bondi alephereke. Ngati zomangira zilephera, ma diamondi amatayika msanga, kotero PDC imataya kuuma kwake ndi kuthwa kwake ndipo imakhala yosagwira ntchito. Pofuna kupewa kulephera kotereku, ocheka a PDC ayenera kuziziritsidwa mokwanira pobowola.

2. Carbide gawo lapansi

Gawo la carbide limapangidwa ndi tungsten carbide. Tungsten carbide (chilinganizo chamankhwala: WC) ndi mankhwala omwe ali ndi tungsten ndi maatomu a carbon. Mtundu wofunikira kwambiri wa tungsten carbide ndi ufa wotuwa wotuwa, koma ukhoza kukanikizidwa ndikupangidwa m'mawonekedwe mwa kukanikiza ndi sintering.

Tungsten carbide imagwiritsidwa ntchito kwambiri pamigodi pobowola miyala ya pamwamba pa nyundo, nyundo zapansi, zodulira, zodula zolimira zazitali, zodula zometa zazitali, kukweza zida zotopetsa, ndi makina otopetsa.

Zzbetter ali ndi ulamuliro wokhwima pa zopangira za diamondi grit ndi carbide gawo lapansi. Popanga pobowola PDC cutter oilfield, timagwiritsa ntchito diamondi yotumizidwa kunja. Tiyeneranso kuphwanya ndi kuumba kachiwiri, kupanga tinthu kukula yunifolomu. Tiyeneranso kuyeretsa diamondi. Timagwiritsa ntchito Laser Particle Size Analyzer kusanthula kukula kwa tinthu, chiyero, ndi kukula kwa gulu lililonse la ufa wa diamondi. Timagwiritsa ntchito ufa wapamwamba wa namwali wokhala ndi magiredi abwino kuti tipange magawo a tungsten carbide.

Ku Zzbetter, titha kupereka mitundu yambiri yodula.

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