Kakaretso
Polycrystalline Diamond Compact (PDC), eo hangata e bitsoang daemane composite, e fetotse indasteri ea ho sebetsa ka ho nepahala ka lebaka la ho thatafala ha eona ho ikhethang, ho hanyetsa ho tsofala le botsitso ba mocheso. Pampiri ena e fana ka tlhahlobo e tebileng ea thepa ea thepa ea PDC, lits'ebetso tsa tlhahiso, le lits'ebetso tse tsoetseng pele ho sebetsa ka ho nepahala. Puisano e akaretsa karolo ea eona ho seheng ka lebelo le phahameng, ho sila ka nepo haholo, ho sebetsa ka mechine e menyenyane, le tlhahiso ea likarolo tsa sefofane. Ho feta moo, liphephetso tse kang litšenyehelo tse phahameng tsa tlhahiso le ho robeha ha bonolo lia rarolloa, hammoho le mekhoa ea nakong e tlang ea theknoloji ea PDC.
1. Selelekela
Ho sebetsa ka nepo ho hloka thepa e thata haholo, e tšoarellang, le e tsitsitseng mochesong ho fihlela ho nepahala ha boemo ba micron. Lisebelisoa tsa setso tsa lisebelisoa tse kang tungsten carbide le tšepe e lebelo le phahameng hangata lia haella maemong a feteletseng, e leng se lebisang ho amoheloeng ha thepa e tsoetseng pele joalo ka Polycrystalline Diamond Compact (PDC). PDC, thepa ea maiketsetso e thehiloeng ho daemane, e bonts'a ts'ebetso e ke keng ea bapisoa ho sebetsaneng le thepa e thata le e robehang habonolo, ho kenyeletsoa le letsopa, metsoako le litšepe tse thatafetseng.
Pampiri ena e hlahloba litšobotsi tsa motheo tsa PDC, mekhoa ea eona ea tlhahiso, le tšusumetso ea eona e fetolang ts'ebetso ea ho sebetsa ka nepo. Ho feta moo, e hlahloba liphephetso tsa hona joale le tsoelo-pele ea nakong e tlang theknolojing ea PDC.
2. Thepa ea PDC
PDC e na le lera la taemane e nang le kristale e ngata (PCD) e hokahaneng le substrate ea tungsten carbide tlas'a maemo a khatello e phahameng, mocheso o phahameng (HPHT). Litšobotsi tsa bohlokoa li kenyelletsa:
2.1 Ho Tiea ho Feteletseng le Khanyetso ea ho Tloha
Taemane ke thepa e tsebahalang ka ho fetisisa (boima ba Mohs ba 10), e leng se etsang hore PDC e be e loketseng ho sebetsa ka ho tjheka thepa e kgopameng.
Ho hanyetsa ho tsofala ho hoholo ho eketsa bophelo ba sesebelisoa, ho fokotsa nako ea ho se sebetse ha ho etsoa ka nepo.
2.2 Ho Tsamaisa Mocheso o Phahameng
Ho qhalana ha mocheso ka katleho ho thibela ho fetoha ha mocheso nakong ea ho sebetsa ka lebelo le phahameng.
E fokotsa ho senyeha ha lisebelisoa 'me e ntlafatsa qetello ea bokaholimo.
2.3 Ho Tsitsisa Lik'hemik'hale
E hanela dikarabelo tsa dikhemikhale tse bakwang ke thepa ya ferrous le e seng ya ferrous.
E fokotsa ho senyeha ha lisebelisoa libakeng tse senyang.
2.4 Ho Tiea ha ho Robeha
Karoloana ea tungsten carbide e eketsa khanyetso ea ho tetebela, e fokotsa ho taboha le ho robeha.
3. Ts'ebetso ea Tlhahiso ea PDC
Tlhahiso ea PDC e kenyelletsa mehato e 'maloa ea bohlokoa:
3.1 Ho Kopanya Phofo ea Taemane
Dikaroloana tsa taemane tse entsweng ka maiketsetso di hlahiswa ka HPHT kapa chemical vapor deposition (CVD).
3.2 Ts'ebetso ea ho Sila
Phofo ea taemane e siloa holim'a substrate ea tungsten carbide tlas'a khatello e matla (5–7 GPa) le mocheso (1,400–1,600°C).
Sesebediswa sa tshepe se thusang ho kopanya taemane le taemane (mohlala, cobalt).
3.3 Kamora ho Sebetsa
Mochini oa laser kapa oa motlakase o ntšang metsi (EDM) o sebelisoa ho bopa PDC hore e be lisebelisoa tsa ho seha.
Mekhoa ea ho phekola holim'a metsi e ntlafatsa ho khomarela le ho fokotsa khatello e setseng.
4. Likopo tsa ho Sebetsa ka ho Nepahetseng
4.1 Ho Seha ka Lebelo le Phahameng ha Thepa e se Nang Feri
Lisebelisoa tsa PDC li ipabola haholo ho etseng metsoako ea aluminium, koporo le carbon fiber.
Ditshebediso tsa dikoloi (ho sebetsa ka piston) le tsa elektroniki (ho sila PCB).
4.2 Ho Sila ka ho Nepahala ho Fetisisa ha Likarolo tsa Optical
E sebelisoa ho etseng lense le seipone bakeng sa li-laser le libonela-hōle.
E fihlella ho rarahana ha bokaholimo ba sub-micron (Ra < 0.01 µm).
4.3 Micro-Machining bakeng sa Lisebelisoa tsa Bongaka
Li-drill tse nyane tsa PDC le li-end mill li hlahisa likarolo tse rarahaneng lisebelisoa tsa ho buoa le li-implant.
4.4 Mechini ea Likarolo tsa Sefofane
Ho etsa di-alloy tsa titanium le CFRP (di-polymer tse matlafaditsweng ka carbon fiber) ka ho se senyehe ha disebediswa.
4.5 Lisebelisoa tse Tsoetseng Pele tsa Ceramics le Mechini ea Tšepe e Thatafalitsoeng
PDC e sebetsa hantle ho feta cubic boron nitride (CBN) ho silicon carbide le tungsten carbide.
5. Liphephetso le Meeli
5.1 Litšenyehelo tse Phahameng tsa Tlhahiso
Litšenyehelo tsa tlhahiso ea HPHT le thepa ea taemane li fokotsa ho amoheloa ho pharaletseng.
5.2 Bobebe ba ho Seha ka ho Sitisoa
Lisebelisoa tsa PDC li sekametse ho qhetsoha ha ho sebetsoa libaka tse sa khaotseng.
5.3 Ho senyeha ha mocheso mochesong o phahameng
Graphitization e etsahala kaholimo ho 700°C, e leng se fokotsang ts'ebeliso ea ho sebetsa ka mokhoa o omileng oa thepa ea ferrous.
5.4 Ho lumellana ho Lekanyelitsoeng le Litšepe tsa Ferrous
Likarabelo tsa lik'hemik'hale tse nang le tšepe li lebisa ho tsofaleng ho potlakileng.
6. Mekhoa le Mekhoa e Mecha ea Nakong e Tlang
6.1 PDC e Hahiloeng ka Nano
Ho kenyelletsoa ha lithollo tsa nano-daemane ho eketsa ho tiea le ho hanyetsa ho tsofala.
6.2 Lisebelisoa tsa Hybrid PDC-CBN
Ho kopanya PDC le nitride ea cubic boron (CBN) bakeng sa ho sebetsa ka tšepe ea ferrous.
6.3 Tlhahiso e Eketsehileng ea Lisebelisoa tsa PDC
Khatiso ea 3D e nolofalletsa li-geometri tse rarahaneng bakeng sa litharollo tsa mechini tse ikhethileng.
6.4 Liaparo tse Tsoetseng Pele
Liaparo tse kang carbon (DLC) tse kang daemane li ntlafatsa bophelo ba sesebelisoa haholo.
7. Qetello
PDC e fetohile ea bohlokoa haholo ho sebetsaneng le ho sebetsa ka nepo, e fana ka ts'ebetso e ke keng ea lekanngoa ho seheng ka lebelo le phahameng, ho sila ka nepo haholo, le ho sebetsa ka mokhoa o monyenyane. Ho sa tsotellehe liphephetso tse kang litšenyehelo tse phahameng le ho robeha habonolo, tsoelo-pele e tsoelang pele saenseng ea thepa le mekhoa ea tlhahiso e tšepisa ho atolosa lits'ebetso tsa eona haholoanyane. Mekhoa e mecha ea nakong e tlang, ho kenyeletsoa le PDC e hlophisitsoeng hantle le meralo ea lisebelisoa tse kopantsoeng, e tla tiisa karolo ea eona mahlaleng a ho sebetsa ka mokhoa o latelang.
Nako ea poso: Phupu-07-2025
