Kakaretso
Indasteri ea sepakapaka e hloka lisebelisoa le lisebelisoa tse khonang ho mamella maemo a feteletseng, ho kenyeletsoa mocheso o phahameng, moaparo oa abrasive, le machining a nepahetseng a li-alloys tse tsoetseng pele. Polycrystalline Diamond Compact (PDC) e hlahile e le thepa ea bohlokoa haholo tlhahisong ea sepakapaka ka lebaka la ho thatafala ha eona ho ikhethang, botsitso ba mocheso le ho se mamelle. Pampiri ena e fana ka tlhahlobo e felletseng ea karolo ea PDC lits'ebetsong tsa sepakapaka, ho kenyeletsoa machining alloys ea titanium, lisebelisoa tse kopaneng, le li-superalloy tsa mocheso o phahameng. Ho feta moo, e hlahloba liphephetso tse kang ho senyeha ha mocheso le litšenyehelo tse phahameng tsa tlhahiso, hammoho le mekhoa ea nakong e tlang ea theknoloji ea PDC bakeng sa lisebelisoa tsa sefofane.
1. Selelekela
Indasteri ea sepakapaka e khetholloa ka litlhoko tse thata tsa ho nepahala, ho tšoarella, le ts'ebetso. Likarolo tse joalo ka li-blade tsa turbine, likarolo tsa sebopeho sa airframe, le likarolo tsa enjine li tlameha ho etsoa ka nepo ea boemo ba micron ha ho ntse ho bolokoa botsitso ba sebopeho tlasa maemo a ts'ebetso a feteletseng. Lisebelisoa tsa setso tsa ho itšeha hangata li hloleha ho fihlela litlhoko tsena, tse lebisang ho amoheloeng ha thepa e tsoetseng pele joalo ka Polycrystalline Diamond Compact (PDC).
PDC, thepa e entsoeng ka daemane e kopantsoeng le tungsten carbide substrate, e fana ka boima bo ke keng ba lekanngoa (ho fihla ho 10,000 HV) le conductivity ea mocheso, e etsa hore e be e loketseng bakeng sa ho etsa lisebelisoa tsa boemo ba sefofane. Pampiri ena e lekola thepa ea PDC, lits'ebetso tsa eona tsa tlhahiso, le phello ea eona ea phetoho tlhahisong ea lifofane. Ho feta moo, e bua ka mefokolo ea hajoale le tsoelo-pele ea nako e tlang ho theknoloji ea PDC.
2. Thepa ea PDC e Amanang le Likopo tsa Aerospace
2.1 Ho Thata ho Feteletseng le Ho se Mamelle ho Thibela
Taemane ke thepa e thata ka ho fetisisa e tsejoang, e nolofalletsang lisebelisoa tsa PDC ho kenya lisebelisoa tsa moea tse senyang haholo tse kang carbon fiber-reinforced polymers (CFRP) le ceramic matrix composite (CMC).
E eketsa haholo bophelo ba sesebelisoa ha bo bapisoa le lisebelisoa tsa carbide kapa CBN, ho fokotsa litšenyehelo tsa machining.
2.2 High Thermal Conductivity le botsitso
Phallo e sebetsang hantle ea mocheso e thibela ho senyeha ha mocheso nakong ea ho sebetsa ka lebelo le phahameng la titanium le li-superalloys tse thehiloeng ho nickel.
E boloka bots'epehi ba maemo a holimo le ha mocheso o phahame (ho fihla ho 700 ° C).
2.3 Boikemisetso ba Lik'hemik'hale
E hanana le karabelo ea lik'hemik'hale ka aluminium, titanium, le lisebelisoa tse kopaneng.
E fokotsa ho roala ha lisebelisoa ha ho etsoa li-alloys tse thibelang ho bola.
2.4 Ho Tiea ha Ho robeha le Boikutlo ba Boipheliso
Tungsten carbide substrate e matlafatsa nako e telele, e fokotsa ho senyeha ha lisebelisoa nakong ea ts'ebetso ea ho itšeha.
3. Ts'ebetso ea Tlhahiso ea PDC bakeng sa Lisebelisoa tsa Aerospace-Grade
3.1 Taemane Synthesis le Sintering
Likaroloana tsa daemane tsa maiketsetso li hlahisoa ka khatello e phahameng, mocheso o phahameng oa mocheso (HPHT) kapa deposition ea mouoane oa lik'hemik'hale (CVD).
Sintering ho 5-7 GPa le 1,400-1,600 ° C e kopanya lijo-thollo tsa daemane ho substrate ea tungsten carbide.
3.2 Precision Tool Fabrication
Laser cutting and electrical discharge machining (EDM) sebopeho sa PDC hore e be mekhoa ea ho kenya le ho qetela.
Mekhoa e tsoetseng pele ea ho sila e netefatsa hore ho na le likarolo tse sehang haholo bakeng sa machining a nepahetseng.
3.3 Kalafo ea Bokaholimo le Liaparo
Liphekolo tsa post-sintering (mohlala, cobalt leaching) li matlafatsa botsitso ba mocheso.
Liaparo tsa carbon-like carbon (DLC) li ntlafatsa le ho feta ho hanyetsa ho apara.
4. Lisebelisoa tsa Bohlokoa tsa Aerospace tsa PDC Tools
4.1 Mechine ea Titanium Alloys (Ti-6Al-4V)
Mathata:Titanium ha e na mocheso o tlase oa mocheso o bakang ho roala ha lisebelisoa ka potlako mochining o tloaelehileng.
Melemo ea PDC:
Ho fokotsa matla a ho itšeha le ho hlahisa mocheso.
Bophelo ba lisebelisoa bo atolositsoeng (ho fihla ho 10x nako e telele ho feta lisebelisoa tsa carbide).
Lisebelisoa: Lisebelisoa tsa lifofane, likarolo tsa enjene, le likarolo tsa sebopeho sa airframe.
4.2 Mochine oa Polymer o Matlafalitsoeng oa Carbon Fiber (CFRP).
Mathata: CFRP e senya haholo, e bakang ho senyeha ha lisebelisoa ka potlako.
Melemo ea PDC:
Delamination e nyane le ho hula fiber ka lebaka la likarolo tse hlabang.
Ho cheka ka lebelo le phahameng le ho poma liphanele tsa fuselage tsa sefofane.
4.3 Li-Superalloys tse Thehiloeng ho Nickel (Inconel 718, Rene 41)
Mathata: boima bo feteletseng le litlamorao tse thata tsa mosebetsi.
Melemo ea PDC:
E boloka ts'ebetso ea ho itšeha ka mocheso o phahameng.
E sebelisoa ka har'a mochini oa lehare la turbine le likarolo tsa kamore ea mollo.
4.4 Ceramic Matrix Composites (CMC) bakeng sa Likopo tsa Hypersonic**
Mathata: Ho brittle ho feteletseng le tlhaho e hlabang.
Melemo ea PDC:
Ho sila ka mokhoa o nepahetseng le ho qeta ho qeta ntle le micro-cracking.
E bohlokoa bakeng sa litsamaiso tsa ts'ireletso ea mocheso likoloing tse latelang tsa sefofane.
4.5 Phaello ea Phatlalatso ka Mor'a Ts'ebetso
Lisebelisoa: Ho qeta likarolo tsa 3D tsa titanium le tsa Inconel.
Melemo ea PDC:
Ho sila ka mokhoa o nepahetseng haholo oa li-geometri tse rarahaneng.
E fihlella litlhoko tsa ho qetela tsa boemo ba sefofane.
5. Mathata le Mefokolo ho Likopo tsa Aerospace
5.1 Ho Fokotseha ha Mocheso ka Lithempereichara tse Holimo
Graphitization e etsahala ka holimo ho 700 ° C, e fokotsa mochine o omileng oa li-superalloys.
5.2 Litšenyehelo tse Phahameng tsa Tlhahiso
Litšenyehelo tse theko e phahameng tsa HPHT le lisebelisoa tsa daemane li thibela ho amoheloa hohle.
5.3 Bofokoli ba ho Seha ho Khatisoang
Lisebelisoa tsa PDC li ka 'na tsa phunya ha ho etsoa machining libaka tse sa tloaelehang (mohlala, masoba a cheka CFRP).
5.4 E Lekanyelitsoeng Ferrous Metal Compatibility
Ho apara ka lik'hemik'hale ho etsahala ha ho etsoa lisebelisoa tsa tšepe.
6. Mekhoa ea Bokamoso le Litlhahiso
6.1 Nano-Structured PDC bakeng sa Matla a Matlafatsoang
Ho kenyelletsoa ha lijo-thollo tsa nano-diamond ho ntlafatsa ho hanyetsa ha fracture.
6.2 Lisebelisoa tsa PDC-CBN tsa Hybrid bakeng sa Machining a Superalloy
E kopanya ho hanyetsa ha PDC le botsitso ba mocheso oa CBN.
6.3 Mochine oa PDC o Thusang ka Laser
Lisebelisoa tsa ho futhumatsa pele li fokotsa matla a ho itšeha le ho lelefatsa bophelo ba lisebelisoa.
6.4 Lisebelisoa tsa Smart PDC tse nang le li-Sensors tse Kenyellelitsoeng
Tlhokomelo ea nako ea 'nete ea ho apara ha lisebelisoa le mocheso bakeng sa tlhokomelo e boletsoeng esale pele.
7. Qetello
PDC e fetohile lejoe la motheo la tlhahiso ea lifofane, e nolofalletsang ho sebetsa ka mokhoa o nepahetseng haholo oa titanium, CFRP, le li-superalloys. Le hoja liqholotso tse kang ho senyeha ha mocheso le litšenyehelo tse phahameng li ntse li tsoela pele, tsoelo-pele e tsoelang pele ea saense ea lintho tse bonahalang le moralo oa lisebelisoa e ntse e atolosa bokhoni ba PDC. Litlhahiso tsa nako e tlang, ho kenyeletsoa PDC e hlophisitsoeng ka nano le lisebelisoa tsa lebasetere, li tla tiisa karolo ea eona molemong oa tlhahiso ea lifofane tsa moloko o tlang.
Nako ea poso: Jul-07-2025
