Abstract
Polycrystalline Diamond Compact (PDC), feem ntau hu ua pob zeb diamond composite, tau hloov pauv kev lag luam precision machining vim nws qhov nyuaj tshwj xeeb, hnav tsis kam, thiab thermal stability. Daim ntawv no muab kev tshuaj xyuas tob txog PDC cov khoom siv, cov txheej txheem tsim khoom, thiab cov ntawv thov siab heev hauv precision machining. Kev sib tham npog nws lub luag haujlwm hauv kev txiav ceev ceev, ultra-precision sib tsoo, micro-machining, thiab aerospace component fabrication. Tsis tas li ntawd, cov teeb meem xws li cov nqi tsim khoom siab thiab brittleness raug daws, nrog rau cov qauv yav tom ntej hauv PDC thev naus laus zis.
1. Kev Taw Qhia
Kev ua kom raug qhov tseeb xav tau cov ntaub ntawv uas muaj qhov nyuaj, ruaj khov, thiab thermal stability kom ua tiav qhov tseeb ntawm micron. Cov ntaub ntawv cuab yeej ib txwm muaj xws li tungsten carbide thiab high-speed steel feem ntau tsis ua haujlwm zoo hauv cov xwm txheej hnyav, ua rau muaj kev siv cov ntaub ntawv siab heev xws li Polycrystalline Diamond Compact (PDC). PDC, ib yam khoom siv pob zeb diamond hluavtaws, ua rau muaj kev ua tau zoo tsis zoo hauv kev ua cov ntaub ntawv tawv thiab tawg yooj yim, suav nrog cov khoom siv ceramics, composites, thiab cov hlau tawv.
Tsab ntawv no tshawb nrhiav cov khoom tseem ceeb ntawm PDC, nws cov txheej txheem tsim khoom, thiab nws qhov kev hloov pauv ntawm kev ua haujlwm precision. Ntxiv mus, nws tshuaj xyuas cov teeb meem tam sim no thiab kev nce qib yav tom ntej hauv PDC thev naus laus zis.
2. Cov Khoom Siv ntawm PDC
PDC muaj ib txheej ntawm polycrystalline pob zeb diamond (PCD) sib txuas nrog lub tungsten carbide substrate nyob rau hauv high-pressure, high-temperature (HPHT). Cov khoom tseem ceeb suav nrog:
2.1 Kev Nyuaj Siab Thiab Kev Hnav Tsis Taus
Pob zeb diamond yog cov khoom siv nyuaj tshaj plaws (Mohs hardness ntawm 10), ua rau PDC zoo tagnrho rau kev siv cov khoom siv abrasive.
Kev tiv taus kev hnav zoo heev ua rau lub cuab yeej siv tau ntev dua, txo qhov tsis ua haujlwm hauv kev ua haujlwm raug.
2.2 Kev Ua Haujlwm Kub Siab
Kev ua kom sov zoo tiv thaiv kev hloov pauv thermal thaum lub sijhawm ua haujlwm ceev.
Txo cov cuab yeej hnav thiab txhim kho qhov tiav ntawm qhov chaw.
2.3 Kev Ruaj Ntseg Tshuaj
Tiv taus cov tshuaj lom neeg nrog cov khoom siv ferrous thiab cov khoom siv uas tsis yog ferrous.
Txo qhov kev puas tsuaj ntawm cov cuab yeej hauv cov chaw muaj corrosive.
2.4 Kev Ruaj Khob
Lub tungsten carbide substrate ua rau muaj kev cuam tshuam tsis kam, txo cov chipping thiab tawg.
3. Kev Tsim Khoom ntawm PDC
Kev tsim cov PDC muaj ntau yam tseem ceeb:
3.1 Kev Sib Xyaws Hmoov Pob Zeb Diamond
Cov pob zeb diamond hluavtaws yog tsim los ntawm HPHT lossis cov tshuaj lom neeg vapor deposition (CVD).
3.2 Cov Txheej Txheem Sintering
Cov hmoov pob zeb diamond raug sintered rau ntawm ib lub tungsten carbide substrate nyob rau hauv qhov siab heev (5–7 GPa) thiab qhov kub (1,400–1,600 ° C).
Ib qho catalyst hlau (piv txwv li, cobalt) pab txhawb kev sib txuas ntawm pob zeb diamond-rau-pob zeb diamond.
3.3 Kev Ua Tom Qab
Laser lossis hluav taws xob tso tawm machining (EDM) yog siv los ua PDC rau hauv cov cuab yeej txiav.
Kev kho qhov chaw ua rau kom muaj kev nplaum zoo dua thiab txo cov kev ntxhov siab seem.
4. Cov ntawv thov hauv Precision Machining
4.1 Kev Txiav Ceev Ceev ntawm Cov Khoom Uas Tsis Yog Hlau
Cov cuab yeej PDC zoo heev hauv kev siv cov khoom siv txhuas, tooj liab, thiab cov khoom siv carbon fiber.
Cov ntawv thov hauv tsheb (piston machining) thiab electronics (PCB milling).
4.2 Kev Sib Tsoo Ultra-Precision ntawm Cov Khoom Siv Optical
Siv rau hauv kev tsim cov lens thiab daim iav rau lasers thiab telescopes.
Ua tiav qhov roughness ntawm qhov chaw sub-micron (Ra < 0.01 µm).
4.3 Kev Siv Tshuab Me Me Rau Cov Khoom Siv Kho Mob
PDC micro-xuas thiab cov tshuab txiav kawg tsim cov yam ntxwv nyuaj hauv cov cuab yeej phais thiab cov khoom cog.
4.4 Kev Siv Tshuab Rau Cov Cheebtsam Aerospace
Kev siv cov titanium alloys thiab CFRP (carbon fiber-reinforced polymers) nrog kev siv cov cuab yeej tsawg kawg nkaus.
4.5 Kev Siv Cov Khoom Uas Ua Los Ntawm Cov Khoom Uas Ua Los Ntawm Cov Khoom Uas Ua Los Ntawm Cov Khoom Uas Muaj ... Ua Los Ntawm Cov Khoom Uas Muaj Cov Khoom Uas Ua Los Ntawm Cov Khoom Uas Ua Los Ntawm Cov Khoom Uas Ua Los Ntawm Cov Khoom Uas Muaj Cov Khoom Uas Ua Los Ntawm Cov Khoom Uas Ua Los Ntawm Cov Khoom Uas Ua Los Ntawm Cov Khoom Uas Ua Los Ntawm Cov Khoom Uas Ua Los Ntawm Cov Khoom Uas
PDC ua tau zoo dua cubic boron nitride (CBN) hauv kev siv silicon carbide thiab tungsten carbide.
5. Tej Yam Nyuaj thiab Tej Yam Txwv
5.1 Cov Nqi Tsim Khoom Siab
Cov nqi ntawm HPHT synthesis thiab cov khoom siv pob zeb diamond txwv tsis pub siv dav.
5.2 Kev tawg yooj yim thaum txiav tsis tu ncua
Cov cuab yeej PDC feem ntau yuav tawg thaum ua cov nto tsis sib xws.
5.3 Kev puas tsuaj ntawm cov cua sov thaum kub siab
Kev ua kom muaj graphitization tshwm sim saum 700 ° C, txwv kev siv hauv kev siv tshuab qhuav ntawm cov khoom siv ferrous.
5.4 Kev Sib Txuas Lus Txwv nrog Cov Hlau Ferrous
Cov tshuaj lom neeg sib xyaw nrog hlau ua rau hnav sai dua.
6. Cov Qauv thiab Kev Tsim Kho Tshiab Yav Tom Ntej
6.1 Nano-Structured PDC
Kev koom ua ke ntawm nano-diamond noob ua rau muaj kev tawv thiab hnav tsis kam.
6.2 Cov Cuab Yeej Sib Xyaws PDC-CBN
Kev sib xyaw ua ke PDC nrog cubic boron nitride (CBN) rau kev ua hlau ferrous.
6.3 Kev Tsim Khoom Ntxiv ntawm PDC Cov Cuab Yeej
Kev luam ntawv 3D ua rau muaj cov qauv geometries nyuaj rau kev daws teeb meem machining.
6.4 Cov Txheej Txheem Siab Tshaj Plaws
Cov txheej txheem carbon zoo li pob zeb diamond (DLC) ua rau lub cuab yeej siv tau ntev dua.
7. Xaus Lus
PDC tau dhau los ua qhov tseem ceeb hauv kev ua haujlwm precision, muab kev ua tau zoo tsis sib xws hauv kev txiav ceev ceev, kev sib tsoo ultra-precision, thiab micro-machining. Txawm hais tias muaj teeb meem xws li tus nqi siab thiab brittleness, kev nce qib hauv kev tshawb fawb khoom siv thiab cov txheej txheem tsim khoom cog lus tias yuav nthuav nws cov ntawv thov ntxiv. Kev tsim kho tshiab yav tom ntej, suav nrog nano-structured PDC thiab hybrid tool designs, yuav ua kom nws lub luag haujlwm hauv cov thev naus laus zis machining tiam tom ntej.
Lub sijhawm tshaj tawm: Lub Xya Hli-07-2025
