Cemented carbide concept: thepa e entsoeng ka motsoako e hlahisoang ke metallurgy ea phofo e nang le motsoako oa tšepe o thata (mohato o thata) le tšepe e kopantsoeng (mohato o kopantsoeng).
Matrix ea carbide e entsoeng ka samente e na le likarolo tse peli: Karolo e 'ngoe ke karolo e thata: Karolo e' ngoe ke tšepe e kopanyang.
Karolo e thatafalitsoeng ke carbide ea litšepe tse feto-fetohang tafoleng ea periodic ea likarolo, joalo ka tungsten carbide, titanium carbide, tantalum carbide, e thata haholo ebile e na le ntlha e qhibilihang e fetang 2000 ℃, tse ling le ho feta 4000 ℃.Ho feta moo, li-nitride tsa tšepe tsa phetoho, li-borides, li-silicides le tsona li na le thepa e tšoanang 'me li ka sebelisoa e le mekhahlelo e thata ka har'a carbide e entsoeng ka samente.Ho ba teng ha karolo e thata ho etsa qeto ea ho thatafala ka ho fetisisa le ho hanyetsa ha motsoako oa alloy.
Litšepe tse kopanyang hangata ke tšepe ea sehlopha sa tšepe, hangata cobalt le nickel.Bakeng sa ho etsa carbide e entsoeng ka samente, phofo e tala e khethoa ka boholo ba likaroloana tse pakeng tsa 1 le 2 microns le tekanyo e phahameng ea bohloeki.Thepa e tala e lekanyetsoa ho ea ka tekanyo e behiloeng ea ho hlophisoa, e kenyellelitsoeng joala kapa mecha e meng ea litaba ka leloala la bolo e metsi, ho sila ka metsi, e le hore e kopane ka ho feletseng, e sithabetseng, e omisitsoeng, e sieved ebe e kenngoa ka boka ba linotsi kapa chese le mefuta e meng ea ho bopa. mahlahana, ebe o omisitsoe, o sefa ebe o etsoa motsoako.Ebe motsoako o granulated, o hatelloa, 'me o futhumatsoa haufi le ntlha e qhibilihisang ea tšepe e kopantsoeng (1300 ~ 1500 ℃), mohato o thata le tšepe e tlamahaneng e tla theha motsoako oa eutectic.Ka mor'a ho pholile, karolo e thata e ajoa ka har'a letlapa le entsoeng ka tšepe e kopantsoeng 'me e amana haufi-ufi ho etsa ntho e tiileng.Ho thatafala ha carbide e entsoeng ka samente ho itšetlehile ka boemo ba ho thatafala ha sekhahla le boholo ba lijo-thollo, ke hore, ho phahama ha karolo ea ho thatafala le boholo ba lijo-thollo, ho ba thata ho feta.Ho tiea ha carbide e entsoeng ka samente ho khethoa ke tšepe e tlamahaneng, 'me ha tšepe e ntse e phahama, matla a ho kobeha a eketseha.
Litšobotsi tsa mantlha tsa carbide e entsoeng ka samente:
1) Boima bo phahameng, ho hanyetsa ho apara ho phahameng
2) Modulus e phahameng ea elasticity
3) Matla a hatellang a phahameng
4) Botsitso bo botle ba lik'hemik'hale (asiti, alkali, khanyetso ea mocheso o phahameng oa oxidation)
5)Bothata ba tšusumetso e tlase
6) Coefficient e tlase ea katoloso, mocheso oa motlakase le motlakase o ts'oanang le tšepe le lisebelisoa tsa eona.
Lisebelisoa tsa carbide tse kentsoeng ka samente: lisebelisoa tsa sejoale-joale tsa lisebelisoa, lisebelisoa tse hanyetsanang le ho roala, mocheso o phahameng le lisebelisoa tse sa bolaeeng ke kutu.
Melemo ea lisebelisoa tsa carbide (ha li bapisoa le tšepe ea alloy):
1) Ka mokhoa o hlakileng, makhetlo a mangata kapa esita le makhetlo a makholo ho ntlafatsa bophelo ba lisebelisoa.
Bophelo ba lisebelisoa tsa tšepe bo ka eketsoa ka makhetlo a 5-80, bophelo ba gage bo eketsehile ka makhetlo a 20-150, bophelo ba hlobo bo eketsehile ka makhetlo a 50-100.
2) Eketsa lebelo la ho itšeha ka tšepe le lebelo la ho phunya bokaholimo ka sekhahla le makhetlo a mashome.
3) Ntlafatsa ho nepahala ha maemo le pheletso ea bokaholimo ba likarolo tse entsoeng ka mochini.
4) Hoa khoneha ho sebetsana le lisebelisoa tse thata tsa mochine tse kang alloy e thibelang mocheso, alloy e sebetsang le tšepe e thata e thata, eo ho leng thata ho e sebetsa ka tšepe e phahameng haholo.
5) E ka etsa likarolo tse itseng tse sa jeng kapa tse sa jeleng mocheso o phahameng, kahoo ea ntlafatsa ho nepahala le bophelo ba mechine le lisebelisoa tse itseng.
Sehlopha sa Cemented Carbide:
1. WC-Co (tungsten drill) mofuta oa motsoako: o entsoeng ka tungsten carbide le cobalt.Ka linako tse ling ka sesebelisoa sa ho itšeha (ka linako tse ling hape ka sesebelisoa sa lead) eketsa 2% kapa ka tlase ho carbide e 'ngoe (tantalum carbide, niobium carbide, vanadium carbide, joalo-joalo) e le li-additives.Cobalt e phahameng: 20-30%, cobalt e mahareng: 10-15%, cobalt e tlase: 3-8%
2. WC-TiC-Co (tungsten-iron-cobalt) -alloy ea mofuta.
Alloy e tlase ea titanium: 4-6% TiC, 9-15% Co
Alloy Chin e Bohareng: 10-20% TiC, 6-8% Co
Alloy e phahameng ea titanium: 25-40% TiC, 4-6% Co
Lisebelisoa tsa 3.WC-TiC-TaC(NbC)-Co.
WC-TiC-Co alloy e na le khanyetso e ntle ea mocheso o phahameng oa oxidation le tšitiso e ntle ea mocheso oa mocheso, kahoo hangata e na le bophelo bo phahameng ba lisebelisoa.TiC:5-15%, TaC(NbC):2-10%, Co:5-15%, e setseng ke WC.
4. Steel cemented carbide: e entsoeng ka tungsten carbide kapa titanium carbide le carbon steel kapa alloy steel.
5. Titanium carbide based alloy: e entsoeng ka carbon ho feta titanium, tšepe ea nickel le tšepe ea molybdenum kapa molybdenum carbide (MoC).Kakaretso ea nickel le molybdenum hangata ke 20-30%.
Carbide e ka sebelisoa ho etsa li-rotary burr, li-blades tsa CNC, li-cutters tsa ho sila, lithipa tse chitja, lithipa tse petsolang, li-blades tsa mapolanka, li-blades tsa saw, lithupa tsa carbide, joalo-joalo.
Nako ea poso: Jul-07-2023