1. Indlela yokuhlanjululwa kwezinto ezibonakalayo
Ngenxa yokuba i-WBN, i-HBN, i-pyrophyllite, igraphite, i-magnesium, isinyithi kunye nezinye izinto ezingcolileyo zihlala kwi-CBN powder;Ukongeza, yona kunye ne-binder powder iqulethe i-oksijeni ye-adsorbed, umphunga wamanzi, njl., engathandekiyo kwi-sintering.Ngoko ke, indlela yokuhlanjululwa kwezinto eziluhlaza yenye yezona zikhonkco ezibalulekileyo zokuqinisekisa ukusebenza kweepolycrystals zokwenziwa.Ngethuba lophuhliso, sasebenzisa iindlela ezilandelayo zokuhlambulula i-micropowder ye-CBN kunye nezinto ezibophezelayo: okokuqala, phatha i-CBN uphawu lwepowder kunye ne-NaOH malunga ne-300C ukususa i-pyrophyllite kunye ne-HBN;Emva koko ubilise i-perchloric acid ukususa igraphite;Ekugqibeleni, sebenzisa i-HCl ukubilisa kwipleyiti yokufudumeza yombane ukususa isinyithi, kwaye uyihlambe ingathathi hlangothi ngamanzi adibeneyo.I-Co, i-Ni, i-Al, njl. esetyenziselwa ukudibanisa iphathwa ngokunciphisa i-hydrogen.Emva koko i-CBN kunye ne-binder ixutywe ngokulinganayo ngokomlinganiselo othile kwaye yongezwa kwi-graphite mold, kwaye ithunyelwe kwi-vacuum furnace kunye noxinzelelo olungaphantsi kwe-1E2, ishushu kwi-800 ~ 1000 ° C nge-1h ukususa ukungcola, i-oksijini ye-adsorbed. kunye nomphunga wamanzi kumphezulu wayo, ukuze umphezulu wengqolowa we-CBN ucoceke kakhulu.
Ngokumalunga nokukhethwa kunye nokongezwa kwezixhobo zokudibanisa, iintlobo zee-agent ezidibeneyo ezisetyenziswa ngoku kwi-polycrystals ye-CBN zinokushwankathelwa zibe ziindidi ezintathu:
(1) Izibophelelo zesinyithi, ezifana noTi, Co, Ni.I-Cu, i-Cr, i-W kunye nezinye isinyithi okanye i-alloys, kulula ukuthambisa kumaqondo okushisa aphezulu, okuchaphazela ubomi besixhobo;
(2) Ibhondi yeCeramic, efana ne-Al2O3, iyamelana nobushushu obuphezulu, kodwa inefuthe elibi, kwaye isixhobo silula ukuwa kunye nomonakalo;
(3) Ibhondi ye-Cermet, njengesisombululo esiqinileyo esenziwe yi-carbides, i-nitrides, i-borides kunye ne-Co, i-Ni, njl., isombulula ukusilela kwezi ntlobo zimbini zingentla.Isixa esipheleleyo sesibophelelo siya kwanela kodwa singagqithisi.Iziphumo zovavanyo zibonisa ukuba ukuxhathisa ukunxiba kunye nokugoba amandla e-polycrystal ahambelana ngokusondeleyo nomndilili wendlela yasimahla (ubunzima bomaleko wesigaba sokubopha), xa umyinge wendlela yasimahla ingu-0.8 ~ 1.2 μ M, umlinganiselo wokunxiba wepolycrystalline uphezulu, kwaye isixa se-binder yi-10% ~ 15% (umlinganiselo wobunzima).
2. I-Cubic boron nitride (CBN) isixhobo se-embryo sinokuhlulwa sibe ngamacandelo amabini
Enye kukubeka umxube we-CBN kunye ne-agent edibeneyo kunye ne-samente ye-carbide matrix kwikomityi ye-molybdenum eyahlulwe ngumaleko okhuselayo wetyhubhu yetyuwa.
Enye kukufaka ngokuthe ngqo i-polycrystalline CBN cutter body ngaphandle kwe-alloy substrate: ukwamkela umshicileli ophezulu onamacala amathandathu, kwaye usebenzise indibano yokufudumeza esecaleni.Hlanganisa i-CBN micro-powder edibeneyo, uyibambe ixesha elithile phantsi koxinzelelo oluthile kunye nozinzo, kwaye ngokucothayo uyiwise kwiqondo lobushushu begumbi kwaye ngokucothayo uyikhuphele kuxinzelelo oluqhelekileyo.I-polycrystalline CBN knife embryo yenziwe
3. Iiparamitha zejometri ze-cubic boron nitride (CBN) isixhobo
Ubomi benkonzo ye-cubic boron nitride (CBN) isixhobo sinxulumene ngokusondeleyo neeparamitha zayo zejometri.Ii-angles zangaphambili ezifanelekileyo kunye nasemva zingaphucula ukuchasana kwempembelelo yesixhobo.Umthamo wokususwa kwe-Chip kunye nomthamo wokutshatyalaliswa kobushushu.Ubungakanani be-rake angle buchaphazela ngokuthe ngqo imeko yoxinzelelo lwecala lokusika kunye noxinzelelo lwangaphakathi lwe-blade.Ukuze ugweme uxinzelelo olugqithisileyo olubangelwa yimpembelelo yomatshini kwincam yesixhobo, i-angle yangaphambili engalunganga (- 5 ° ~ - 10 °) yamkelwa ngokubanzi.Ngexesha elifanayo, ukwenzela ukunciphisa ukunxiba kwe-angle yangasemva, ii-angles eziphambili kunye ne-axiliary ngasemva ziyi-6 °, i-radius ye-tip yesixhobo i-0.4 - 1.2 mm, kwaye i-chamfer iphantsi komhlaba.
4. Ukuhlolwa kwezixhobo ze-cubic boron nitride (CBN).
Ukongeza kuvavanyo lwesalathiso sobulukhuni, amandla okugoba, amandla okuqina kunye nezinye iipropathi zomzimba, kubaluleke kakhulu ukusebenzisa i-electron microscope yamandla aphezulu ukujonga umphezulu kunye nomphetho wonyango oluchanekileyo lwencakuba nganye.Okulandelayo kukuhlolwa komlinganiselo, ukuchaneka komlinganiselo, ixabiso le-M, ukunyamezela kwejometri, uburhabaxa besixhobo, kunye nokupakishwa kunye nokugcinwa kwempahla.
Ixesha lokuposa: Feb-23-2023