1. Mokhoa oa tlhoekiso oa thepa e tala
Hobane WBN, HBN, pyrophyllite, graphite, magnesium, tšepe le litšila tse ling li ntse li le phofo ea CBN;Ho phaella moo, eona le phofo ea binder li na le oksijene e kentsoeng, mouoane oa metsi, joalo-joalo, e sa rateheng ho sintering.Ka hona, mokhoa oa tlhoekiso oa thepa e tala ke e 'ngoe ea lihokela tsa bohlokoa ho netefatsa ts'ebetso ea li-polycrystals tsa maiketsetso.Nakong ea nts'etsopele, re sebelisitse mekhoa e latelang ho hloekisa CBN micropowder le thepa e tlamang: pele, tšoara phofo ea letšoao la CBN ka NaOH hoo e ka bang 300C ho tlosa pyrophyllite le HBN;Ebe u pheha perchloric acid ho tlosa graphite;Qetellong, sebelisa HCl ho belisa holim'a poleiti ea ho futhumatsa ea motlakase ho tlosa tšepe, 'me ue hlatsoe hore e se ke ea jele paate ka metsi a hloekisitsoeng.Co, Ni, Al, joalo-joalo tse sebelisetsoang ho kopanya li tšoaroa ka ho fokotsa haedrojene.Ebe CBN le binder li tsoakane ka mokhoa o ts'oanang ho ea ka karolo e itseng 'me li kenngoa ka har'a hlobo ea graphite,' me li romelloa ka sebōping sa vacuum se nang le khatello e ka tlaase ho 1E2, se futhumetse ho 800 ~ 1000 ° C bakeng sa 1h ho tlosa litšila, oksijene e adsorbed. le mouoane oa metsi holim'a eona, e le hore sebaka sa lijo-thollo sa CBN se hloeke haholo.
Mabapi le khetho le tlatsetso ea lisebelisoa tsa tlamahano, mefuta ea li-bonding agents tse sebelisoang hajoale ho CBN polycrystals e ka akaretsoa ka mekhahlelo e meraro:
(1) Litlamahano tsa tšepe, tse kang Ti, Co, Ni.Cu, Cr, W le lisebelisoa tse ling kapa li-alloys, li bonolo ho nolofatsa mocheso o phahameng, tse amang bophelo ba lisebelisoa;
(2) Ceramic bond, e kang Al2O3, e hanyetsana le mocheso o phahameng, empa e na le tšusumetso e mpe, 'me sesebelisoa se bonolo ho oa le ho senya;
(3) Cermet bond, e kang tharollo e tiileng e entsoeng ke carbides, nitrides, borides le Co, Ni, joalo-joalo, e rarolla mefokolo ea mefuta e 'meli e ka holimo ea tlamo.Kakaretso ea chelete e tlamang e tla lekana empa e se ke ea feta.Liphetho tsa liteko li bontša hore ho hanyetsa ho roala le matla a ho koba ha polycrystal a amana haufi-ufi le tsela e tloaelehileng ea mahala (botenya ba sekhahla sa bonding), ha tsela e sa lefelloeng e le 0.8 ~ 1.2 μ M, tekanyo ea ho apara polycrystalline ke eona e phahameng ka ho fetisisa, le palo ea binder ke 10% ~ 15% (karolelano ea boima).
2. Cubic boron nitride (CBN) sesebelisoa embryo e ka aroloa ka mekhahlelo e 'meli
E 'ngoe ke ho kenya motsoako oa CBN le bonding agent le matrix a samente ea carbide ka har'a senoelo sa molybdenum se arohaneng ke lesela le sireletsang carbon tube.
E 'ngoe ke ho sinter ka kotloloho 'mele oa seha oa polycrystalline CBN ntle le alloy substrate: amohela mochine o ka holimo oa mahlakoreng a tšeletseng,' me u sebelise mocheso oa kopano o futhumatsang mahlakoreng.Bokella phofo e nyenyane ea CBN e tsoakiloeng, e tšoare nako e itseng tlas'a khatello e itseng le botsitso, ebe u e theola butle-butle mocheso oa kamore ebe o e theolela butle-butle khatellong e tloaelehileng.Ho entsoe embryo ea polycrystalline CBN thipa
3. Mekhahlelo ea geometri ea sesebelisoa sa cubic boron nitride (CBN).
Bophelo ba ts'ebeletso ea sesebelisoa sa cubic boron nitride (CBN) bo amana haufi-ufi le likarolo tsa eona tsa geometri.Li-angles tse nepahetseng tse ka pele le tse ka morao li ka ntlafatsa ho hanyetsa phello ea sesebelisoa.Bokhoni ba ho tlosa chip le matla a ho senya mocheso.Boholo ba angle angle ama ka ho toba boemo ba khatello ea kelello ea ho itšeha bohale le ka hare khatello ea maikutlo boemo ba lehare.E le ho qoba khatello ea maikutlo e feteletseng e bakoang ke ts'ebetso ea mochini ntlheng ea sesebelisoa, hangata ho amoheloa lehlakore le ka pele le fosahetseng (- 5 ° ~ - 10 °).Ka nako e ts'oanang, e le ho fokotsa ho roala ha lehlakoreng le ka morao, li-angles tse ka sehloohong le tse thusang tse ka morao ke 6 °, radius ea ntlha ea sesebelisoa ke 0.4 - 1.2 mm, 'me chamfer e fatše e boreleli.
4. Ho hlahloba lisebelisoa tsa cubic boron nitride (CBN).
Ntle le ho lekola index ea boima, matla a ho kobeha, matla a thata le lisebelisoa tse ling tsa 'mele, ho bohlokoa haholo ho sebelisa microscope ea matla a phahameng ho lekola ho nepahala ha kalafo ea lehare le leng le le leng.E latelang ke tlhahlobo ea boholo, ho nepahala ha tekanyo, boleng ba M, mamello ea geometri, ho ba boima ha sesebelisoa, ebe ho paka le ho boloka thepa.
Nako ea poso: Feb-23-2023