PDC txiav cov cuab yeej, luv luv rau Polycrystalline Pob zeb diamond Compact Cutter, yog superhard tej cuab yeej ua los ntawm sintering ib polycrystalline pob zeb diamond txheej nrog ib tug cemented carbide matrix nyob rau hauv kub thiab siab. Txij li thaum lawv cov kev taw qhia, PDC txiav cov cuab yeej tau tsim ib txoj hauj lwm irreplaceable nyob rau hauv cov roj drilling, geological kev tshawb fawb, mining, thiab tej precision machining teb vim yog kev sib txuas ntawm lub siab hardness ntawm pob zeb diamond thiab zoo toughness ntawm cemented carbide.
The structure of PDC cutting tools typically consists of two layers: the outer layer is a polycrystalline diamond layer, formed by the high-temperature and high-pressure sintering of micron-sized diamond particles under the action of a bonding phase to create a dense and wear-resistant cutting surface; Cov txheej hauv qab yog cov cemented carbide matrix, muab cov cuab yeej txhawb nqa thiab clamping lub zog, muab cov cuab yeej muaj qee qhov kev tiv thaiv tawg thaum raug cuam tshuam. Covalent daim ntawv cog lus network ntawm pob zeb diamond txheej endows nws nrog hardness tsis tshua muaj siab (ze rau tej pob zeb diamond), zoo heev hnav tsis kam, thiab tsis tshua muaj tshuaj reactivity, ua rau nws tshwj xeeb tshaj yog haum rau machining cov ntaub ntawv uas siab hardness, siab hnav tsis kam, los yog muaj cov khoom nyuaj. Cov cemented carbide matrix compensates rau brittleness ntawm pob zeb diamond ntshiab, tso cai rau lub cuab tam kom zoo dua absorbing zog thaum lub sij hawm drilling los yog intermittent txiav.
Nyob rau hauv cov roj thiab roj drilling teb, PDC laum khoom yog ib qho kev thov ntawm PDC cov cuab yeej. Lawv txoj hauv kev ua haujlwm siv ntau yam PDC txiav cov hniav rau tib lub sijhawm txiav thiab tsoo cov pob zeb hauv qab ntawm qhov dej, muab qhov zoo xws li kev siv tshuab drilling ceev, kev ua haujlwm siab, thiab kev siv hluav taws xob tsawg. Piv nrog rau cov menyuam lub khob hliav qab ib txwm siv, PDC laum cov khoom nthuav tawm cov pob zeb ntau dua - tawg efficiency thaum ntsib nruab nrab- mos mus rau nruab nrab - nyuaj formations xws li shale, limestone, thiab sandstone, thiab tuaj yeem txo cov kev ua haujlwm tripping, shortening lub voj voog drilling. Hauv kev tshawb nrhiav geological thiab mining, PDC cov cuab yeej kuj tau siv dav hauv coring laum cov khoom thiab txiav cov cuab yeej los txhim kho cov qauv kev ua tau zoo thiab cov cuab yeej siv tau ntev.
Tshaj li qhov drilling, PDC cov cuab yeej kuj tau siv rau hauv qee qhov precision thiab semi- precision machining daim ntaub ntawv, tshwj xeeb tshaj yog tsim rau machining cov ntaub ntawv uas muaj cov cuab yeej adhesion los yog ceev hnav, xws li siab - silicon aluminium alloys, engineering plastics, thiab fiber ntau composites. Lawv lub siab hnav tsis kam tuav lub ntsej muag ntse rau lub sijhawm ntev, txo cov cuab yeej hloov zaus thiab txhim kho machining qhov sib xws thiab qhov zoo.
Kev ua tau zoo ntawm PDC cov cuab yeej yog cuam tshuam los ntawm qhov zoo ntawm cov pob zeb diamond txheej, hom kev sib koom ua ke, cov txheej txheem sintering, thiab kev kho mob tom ntej. Cov txheej txheem niaj hnub no txuas ntxiv txhim kho lawv cov thermal stability thiab kev cuam tshuam los ntawm kev ua kom zoo dua pob zeb diamond loj faib, txo cov catalytic hlau residue, thiab qhia cov txheej txheem ceramic los yog carbide sib txuas kom haum rau cov khoom hnyav dua thiab ua haujlwm nyuaj. Ib txhij, cov tuam txhab lag luam muab PDC txiav cov hniav nyob rau hauv ntau yam duab, qhov ntau thiab tsawg, thiab cov hniav nto tsim kom tau raws li cov pob zeb customized- tawg lossis txiav cov kev xav tau rau cov ntawv thov sib txawv.
Zuag qhia tag nrho, PDC cov cuab yeej yog siab - cov cuab yeej txiav ua haujlwm tau zoo uas cov organically sib xyaw cov ntaub ntawv nyuaj nrog cov matrix nyuaj. Lawv cov hardness siab, siab hnav tsis kam, thiab kev hloov tau zoo rau ntau yam kev ua haujlwm ua rau lawv ua lub luag haujlwm tseem ceeb hauv kev tshawb nrhiav thiab kev txhim kho thiab kev ua haujlwm tshwj xeeb. Nrog rau kev nce qib hauv cov ntaub ntawv kev tshawb fawb thiab kev tsim khoom siv thev naus laus zis, daim ntawv thov cov peev txheej thiab kev ua tau zoo ntawm PDC cov cuab yeej txiav yuav txuas ntxiv, muab kev txhawb nqa zoo rau kev txhim kho kev ua haujlwm thiab txo cov nqi tag nrho.
