Idayimane elilodwa lekristalu yokwenziwa lathuthukiswa kancane kancane ngemva kweminyaka yawo-1950.Ihlanganiswa kusuka ku-graphite njengento eluhlaza, yengezwe nge-catalyst, futhi ingaphansi kwezinga lokushisa eliphezulu kanye ne-ultra-high pressure.Idayimane le-polycrystalline yokwenziwa (i-PCD) liyi-polycrystalline material elakhiwe yi-polymerization yempushana yedayimane kusetshenziswa izibophezelo zensimbi ezifana ne-Co, Ni, njll. Idayimane le-polycrystalline yokwenziwa iwuhlobo olukhethekile lomkhiqizo we-powder metallurgy, oludonsa kwezinye izindlela nezindlela zempushana evamile. i-metallurgy endleleni yayo yokukhiqiza.
Phakathi nenqubo ye-sintering, ngenxa yokwengezwa kwezithasiselo, ibhuloho elihlanganisayo elakhiwe ikakhulukazi i-Co, Mo, W, WC, kanye ne-Ni lakhiwa phakathi kwamakristalu e-PCD, futhi amadayimane agxiliswe ngokuqinile ohlakeni oluqinile olwakhiwe ibhuloho lokubopha.Umsebenzi we-metal binder uwukubamba ngokuqinile idayimane futhi usebenzise ngokugcwele ukusika kwayo ukusebenza kahle.Ngaphezu kwalokho, ngenxa yokusabalalisa mahhala okusanhlamvu ngezindlela ezihlukahlukene, kunzima ukuthi imifantu isakaze kusuka okusanhlamvu kuya kwesinye, okuthuthukisa kakhulu amandla nokuqina kwe-PCD.
Kulolu shicilelo, sizofingqa kafushane ezinye zezici zeFaka i-PCD.
1. Ubulukhuni obuphezulu be-Ultra nokumelana nokugqoka: okungenakuqhathaniswa ngokwemvelo, izinto zokwakha zinobunzima obufika ku-10000HV, futhi ukumelana kwabo kokugqoka cishe izikhathi eziyikhulu kune-Carbide insert;
2. Ukuqina, ukumelana nokugqokwa, i-microstrength, ubunzima bokugaya, kanye ne-coefficient yokungqubuzana phakathi kwamakristalu e-anisotropic ecwecwe elilodwa ledayimane nezinto zokusebenza ziyahlukahluka kakhulu ezindizeni zekristalu nezimo ezihlukahlukene.Ngakho-ke, lapho uklama futhi ukhiqiza amathuluzi edayimane elilodwa le-crystal, kubalulekile ukukhetha kahle isiqondiso sekristalu, futhi ukuqondiswa kwekristalu kufanele kwenziwe ngezinto zokusetshenziswa kwedayimane.Ukukhethwa kwezindawo zokusika zangaphambili nangemuva zamathuluzi okusika i-PCD kuyindaba ebalulekile ekuklameni amathuluzi e-lathe e-crystal PCD eyodwa;
3. I-low friction coefficient: Okufakwayo kwedayimane kune-coefficient ephansi yokungqubuzana lapho kucutshungulwa ezinye izinto zensimbi ezingenayo ayoni uma kuqhathaniswa nezinye izinto ezifakiwe, ezicishe zibe uhhafu walezo zama-carbides, ngokuvamile azungeze u-0.2.
4. Unqenqema lokusika lwe-PCD lubukhali kakhulu, futhi i-radius engacacile yonqenqema lokusika ingafinyelela ku-0.1-0.5um.Futhi amathuluzi edayimane elilodwa le-crystal yemvelo angasetshenziswa ebangeni elingu-0.002-0.005um.Ngakho-ke, amathuluzi edayimane emvelo angakwazi ukusika ama-ultra-thin and ultra-precision machining.
5. I-coefficient yokunwetshwa okushisayo kwedayimane ene-coefficient ephansi yokwandisa okushisayo incane kunaleyo ye-carbide enosimende, cishe u-1/10 waleyo yensimbi enesivinini esikhulu.Ngakho-ke, amathuluzi okusika idayimane awakhiqizi ukuwohloka kokushisa okuphawulekayo, okusho ukuthi ukuguqulwa kosayizi wethuluzi okubangelwa ukusika ukushisa kuncane, okubaluleke kakhulu ekwenzeni ukunemba nokunemba kwe-ultra enezidingo zokunemba okuphezulu.
Ukusetshenziswa kwamathuluzi okusika idayimane
Faka i-PCDisetshenziselwa kakhulu ukusika/ukubhoreka/ukugaywa kwezinsimbi ezingezona ayoni nezinto zensimbi ezingenayo isivinini esikhulu, ezifanele ukucubungula izinto ezingezona ezensimbi ezikwazi ukumelana nokugqokwa njenge-glass fibre nezinto zobumba;Izinsimbi ezihlukahlukene ezingenayo insimbi: i-aluminium, i-titanium, i-silicon, i-magnesium, njll., kanye nezinqubo ezihlukahlukene zokuqeda insimbi ezingenayo insimbi;
Ukungalungi: ukuzinza okushisayo okuphansi.Nakuba kuyithuluzi lokusika elinobunzima obukhulu kakhulu, isimo sayo esilinganiselwe singaphansi kuka-700 ℃.Uma izinga lokushisa lokusika lidlula ku-700 ℃, lizolahlekelwa ubulukhuni balo bangempela obuphezulu kakhulu.Yingakho amathuluzi edayimane engafanele ukwenza izinsimbi ezisansimbi.Ngenxa yokungaqini kahle kwamakhemikhali edayimane, i-carbon element kumadayimane izosebenzisana nama-athomu ensimbi emazingeni okushisa aphezulu, futhi izoguqulwa ibe isakhiwo segraphite, okwandisa kakhulu ukulimala kwamathuluzi.
Isikhathi sokuthumela: May-17-2023