Umsiki weDayimane oZinzileyo oZinzileyo wePolycrystalline weDayimane

I-polycrystalline bit cutters yedayimane ezinzileyo ethermally yaziswa xa kwafunyaniswa ukuba ii-bit cutters zePDC ngamanye amaxesha ziye zacholwa ngexesha lokomba. Oku kusilela kwakungenxa yoxinzelelo lwangaphakathi olubangelwa ukwandiswa okungafaniyo kwedayimani kunye nesixhobo sokubopha.

I-Cobalt sesona sibophelelo sisetyenziswa kakhulu kwiimveliso ze-PCD ze-sintered. Esi sixhobo sine-coefficient ye-thermal yokwandiswa kwe-1.2 x 10 ^ -5 deg. C xa kuthelekiswa ne-2.7 x 10 ^-6 yedayimane. Ke ngoko icobalt yanda ngokukhawuleza kunedayimani. Njengoko ubushushu obuninzi be-cutter bukhuphuka ngaphezu kwe-730 deg C uxinzelelo lwangaphakathi olubangelwa ngamazinga ahlukeneyo okwandisa kukhokelela ekuqhekekeni okukhulu kwe-intergranular, i-macro chipping, kunye nokungaphumeleli ngokukhawuleza kwe-cutter.

La maqondo obushushu aphezulu kakhulu kunamaqondo obushushu anokufunyanwa emazantsi equla (ngokuqhelekileyo li-100 deg C ku-8000 ft). Zivela ngenxa yokukhuhlana okwenziwa sisenzo sokucheba apho ezi ntwana zinqumla ilitye.

Esi sithintelo sobushushu se-730 deg C sibonise imiqobo enzulu yokuphucula ukusebenza kweebhithi zePCD cutter.

Abavelisi bazama ukuphucula ukuzinza kwe-thermal yabasiki kunye nezisiki ze-diamond bits ze-polycrystalline ezizinzile.

Ezi bits cutters zizinzile ngakumbi kumaqondo okushisa aphezulu kuba i-cobalt binder isusiwe kwaye oku kuphelisa uxinzelelo lwangaphakathi olubangelwa ukwandiswa kokwahluka. Kuba uninzi lwesibophelelo sidityanisiwe, unyango olwandisiweyo oluneeasidi lunokukhupha uninzi lwalo ngaphandle. Izibophelelo phakathi kweengqungquthela zedayimani ezikufutshane azithinteki, zigcina i-50-80% yamandla e-compacts. I-PCD ekhutshiweyo i-thermal stable kwi-inert okanye ukunciphisa i-atmospheres ukuya kwi-1200 deg C kodwa iya kuthotywa kwi-875 deg C phambi kwe-oxygen.

Kwaboniswa ukuba ukuba i-cobalt impahla ingasuswa kwi-gap yengqolowa, ukuzinza kwe-thermal yamazinyo e-PDC kuya kuphuculwa kakhulu ukwenzela ukuba i-bit ikwazi ukubhobhoza ngcono kwiifom ezinzima kunye ne-abrasive. Le teknoloji yokususa i-cobalt iphakamisa ukuxhathisa ukunxiba kwamazinyo e-PDC ekubunjweni kwamatye anzima kakhulu kwaye yandisa ngakumbi uluhlu lwezicelo zeebits zePDC.

Ngolwazi oluthe kratya malunga nabasiki bePDC, wamkelekile ukuba usindwendwele www.zzbetter.com