Izixhobo zokusika ze-PCD zinobulukhuni obuphezulu, amandla aphezulu okucinezela, ukuhanjiswa kakuhle kwe-thermal kunye nokumelana nokunxiba, kwaye zinokufumana ukuchaneka okuphezulu komatshini kunye nokusebenza kakuhle kwi-high-speed machining.
Iimpawu ezingentla zichongwa yi-crystal state yedayimane.Kwikristale yedayimani, ii-electron ezine ze-valence ze-athomu zekhabhoni zenza iibhondi ngokwesakhiwo se-tetrahedral, kwaye iathom yekhabhoni nganye yenza ibhondi edibeneyo kunye neeathom ezine ezikufutshane, ngaloo ndlela zenza isakhelo sedayimani.Esi sakhiwo sinamandla okubophelela okuqinileyo kunye nesalathiso, nto leyo eyenza idayimani ibe nzima kakhulu.Ngenxa yokuba ulwakhiwo lwedayimane ye-polycrystalline (i-PCD) ngumzimba osikiweyo wedayimani ecolekileyo enemikhomba-ndlela eyahlukileyo, ukuqina kwayo kunye nokumelana nokunxiba kusengaphantsi kunoko kwedayimani yekristale enye nangona ukongezwa kwe-binder.Nangona kunjalo, i-PCD sintered body is isotropic, ngoko akukho lula ukuqhekeka kwinqwelomoya enye.
2. Umahluko kwizalathi zokusebenza
Ubunzima be-PCD bunokufikelela kwi-8000HV, i-80 ~ 120 amaxesha e-carbide enesamente;Ngamafutshane, i-PCD inobomi obude benkonzo kwaye iphucula ukusebenza kakuhle kwemveliso.
I-thermal conductivity ye-PCD yi-700W / mK, i-1.5 ~ 9 amaxesha e-carbide ene-cemented, kwaye nangaphezulu kune-PCBN kunye nobhedu, ngoko ke ukuhanjiswa kobushushu kwezixhobo ze-PCD kukhawuleza;
I-coefficient ye-friction ye-PCD ngokuqhelekileyo kuphela yi-0.1 ~ 0.3 (i-coefficient ye-friction ye-cemented carbide yi-0.4 ~ 1), ngoko ke izixhobo ze-PCD zinokunciphisa kakhulu amandla okusika;
I-coefficient yokwandiswa kwe-thermal ye-PCD kuphela i-0.9 × 10 ^ -6～1.18 × 10 ^ - 6, eyi-1/5 kuphela ye-carbide ene-cemented, ngoko ke i-thermal deformation yesixhobo se-PCD sincinci kwaye ukuchaneka kwe-machining kuphezulu;
Ubudlelwane phakathi kwesixhobo se-PCD kunye nesinyithi esingenamvubelo kunye nezinto ezingezizo ezentsimbi zincinci kakhulu, kwaye iitshiphusi akukho lula ukuzibophelela kwincam yesixhobo ukwenza idiphozithi yetshiphu ngexesha lokucubungula.
Ixesha lokuposa: Feb-23-2023