Ukugqoka okushisayo kanye nokususwa kwe-cobalt ye-PDC

I. Ukugqoka okushisayo kanye nokususwa kwe-cobalt ye-PDC

Enqubweni ephezulu yengcindezi ye-PDC, i-Cobalt isebenza njenge-catalyst ukukhuthaza inhlanganisela eqondile yedayimane nedayimane, futhi wenze ungqimba lwedayimane kanye ne-tungsten carbide matrix ukuba iphelele, okubangelwa ukumelana kahle kwendawo kanye nokumelana kahle kwemvelo,

Ukumelana nokushisa okushisa kukhawulelwe impela. Ngaphansi kwengcindezi yezulu, ingaphezulu ledayimane lingaguqula amazinga okushisa azungeze ama-900 ℃ noma ngaphezulu. Ngesikhathi sokusebenzisa, ama-PDC wendabuko athambekele ekunciphiseni cishe ngo-750 ℃. Lapho ushayela izingqimba ze-rock ezilukhuni futhi ezi-arrasive, ama-PDC angafinyelela kalula lokhu okushisa ngenxa yokushisa okuvuthayo, kanye namazinga okushisa asendaweni (okusho, izinga lokushisa lasendaweni kuma-cobalt (1495 ° C).

Qhathanisa nedayimane elihlanzekile, ngenxa yokuba khona kwe-cobalt, amadayimane ahambelana negrafu emazingeni okushisa aphansi. Ngenxa yalokhu, ukugqoka kudayimane kubangelwa ukuvezwa okubangelwa ukushisa okwenziwe ngengozi. Ngaphezu kwalokho, ukunwebeka okushisayo kwe-cobalt kuphakeme kakhulu kunalokho kwedayimane, ngakho-ke ngesikhathi sokushisa, ukubopha phakathi kwedayimane kungaphazamiseka ngokwanda kwe-cobalt.

Ngo-1983, abacwaningi ababili bathola ukwelashwa kwedayimane ngaphezulu kwezendlalelo zedayimane le-PDC, okuthuthukisa kakhulu ukusebenza kwamazinyo e-PDC. Kodwa-ke, lokhu kwasungulwa akuzange kukuthole ukunakwa okufanelwe. Akuzange kube ngemuva kuka-2000 ukuthi, ngokuqonda okujulile kwezendlalelo zedayimane le-PDC, abahlinzeki be-drill baqala ukusebenzisa lobu buchwepheshe kumazinyo e-PDC asetshenziswa ekushayweni kwamazinyo. Amazinyo aphathwe ngale ndlela alungele ukwakheka okuthe xaxa ngokugqoka okubalulekile okwenziwe ngomshini futhi kuvame ukubizwa ngokuthi "amazinyo" we-de-cobalted.

Okubizwa ngokuthi "i-de-cobalt" kwenziwa ngendlela yendabuko ukwenza i-PDC, bese kuba khona indawo yayo ye-diamond ungqimba egxiliswe ku-acid eqinile ukuze ususe inqubo ye-cobalt ngokusebenzisa inqubo ye-acid etching. Ukujula kokususwa kwe-cobalt kungafinyelela ama-microns angama-200.

Uvivinyo olunesikhundla esindayo lwenziwa kumazinyo amabili afanayo e-PDC (elinye lawo elalibiyele ukwelashwa kwe-cobalt yokususa endaweni yedayimane). Ngemuva kokusika i-5000m ye-granite, kwatholakala ukuthi izinga lokugqoka le-PDC elingasuswanga le-cobalt liqale ukukhulisa kakhulu. Ngokuphambene nalokho, i-PDC esusiwe ye-cobalt igcinwe isivinini esizinzile sokusika ngenkathi sisika cishe i-15000m yedwala.

2. Indlela yokuthola i-PDC

Kunezinhlobo ezimbili zezindlela zokuthola amazinyo we-PDC, okungukuthi okuqhakazayo kokuhlola nokuhlolwa okungeyona eyonakalisayo.

1. Ukuhlolwa okubhubhisayo

Lezi zivivinyo zenzelwe ukulingisa izimo ze-Dowhole njengeqiniso ngangokunokwenzeka ukuze zihlole ukusebenza kwamazinyo curching ngaphansi kwezimo ezinjalo. Lezi zinhlobo ezimbili eziphambili zokuhlola okubhubhisayo zivivinya izivivinyo zokumelana kanye nokuhlolwa kokumelana nomthelela.

(1) Gqoka ukuhlolwa kokumelana

Izinhlobo ezintathu zemishini zisetshenziselwa ukwenza izivivinyo zokumelana kwe-PDC

A. Vertical Lathe (VTL)

Ngesikhathi sokuhlolwa, qala ngokulungisa i-PDC bit ku-VTL Lathe bese ubeka isampula ye-rock (imvamisa) eduze kwe-PDC bit. Bese ujikeleze isampula ye-rock ezungeze i-axis ye-lathe ngesivinini esithile. I-PDC isinciphise isampula rock ngokujula okuthile. Lapho usebenzisa i-granite ukuze uhlolwe, lokhu kujula kokusika ngokuvamile kungaphansi kwe-1 mm. Lokhu kuhlolwa kungaba ukomile noma kumanzi. Ekuhlolweni kwe- "vtl elomile," lapho i-PDC isusa edwaleni, akukho kupholisa okusetshenzisiwe; Konke ukushisa kwengxabano kukhiqizwa i-PDC, ukusheshisa inqubo yokuqhafaza yedayimane. Le ndlela yokuhlola iveza imiphumela emihle kakhulu lapho kuhlaziywa izingcezu ze-PDC ngaphansi kwezimo ezidinga ingcindezi yokumba okuphezulu noma ngejubane eliphakeme lokujikeleza.

Ukuhlolwa kwe- "WET VTL" kuthola impilo ye-PDC ngaphansi kwezimo ezilinganiselayo zokushisa ngokupholisa amazinyo e-PDC ngamanzi noma umoya ngesikhathi sokuhlola. Ngakho-ke, umthombo oyinhloko wokugqoka walesi sivivinyo ukugaya kwesampula yedwala kunokuba kunesici sokushisa.

B, enezithombe zathe

Lokhu kuhlolwa nakho kwenziwa nge-granite, futhi umgomo wokuhlolwa ngokufana ne-VTL. Isikhathi sokuhlola singamaminithi ambalwa kuphela, futhi ukushaqeka okushisayo phakathi kwamazinyo e-granite ne-PDC kukhawulelwe kakhulu.

Amapharamitha wokuhlola ama-granite asetshenziswa ngabahlinzeki be-PDC Gear bahluka. Isibonelo, amapharamitha wokuhlola asetshenziswa yinkampani yokwenziwa yenkampani kanye ne-DI e-United States awafani ngokufanayo, kepha asebenzisa izinto ezifanayo zamagagasi ezivivinyo zawo, amabanga aphakathi nendawo angenawo ama-polyral rock amancane ane-190MPA.

C. Abrasion ratio ukulinganisa ithuluzi

Ngaphansi kwemibandela ebekiwe, ungqimba lwedayimane lwe-PDC lusetshenziselwa ukunciphisa isondo lokugaya le-silicon carbide, kanye nesilinganiso sezinga lokugqoka lesondo lokugaya kanye nezinga lokugqoka le-PDC, elibizwa nge-Wear Index.

(2) Ukuhlolwa kokumelana nomthelela

Indlela yokuhlola umthelela ifaka ukufaka amazinyo we-PDC endaweni engama-15-25 degrees bese wehlisa into ekuphakameni okuthile ukuze ashaye ungqimba lwedayimane emazinyweni we-PDC ngokuqondile. Isisindo nokuphakama kwento ewayo kukhombisa ithonya lamandla weleveli etholakele ngezinyo lokuhlola, elingakhula kancane kancane ku-100 Joules. Izinyo ngalinye lingathinteka izikhathi ezingama-3-7 kuze kube yilapho lingakwazi ukuhlolelwa okunye. Ngokuvamile, okungenani amasampula ayi-10 ohlobo ngalunye lwamazinyo ahlolwe ezingeni ngalinye lamandla. Njengoba kunobubanzi ekumelaneni kwamazinyo ukuphazamisa, imiphumela yokuhlola esezingeni elifanelekile lendawo yindawo ephakathi yedayimane elanda ngemuva kwezinyo ngalinye.

2. Ukuhlolwa okungelonakalisi

Indlela yokuhlola yokuhlola esetshenziswa kakhulu engabhubhisi (ngaphandle kokuhlola okubonakalayo nokubonakalayo) ukuskena kwe-ultrasonic (CSCAN).

I-C Scanning Technology ingathola iziphambeko ezincane futhi inqume indawo nosayizi wamaphutha. Lapho wenza lolu vivinyo, qala ngokufaka izinyo le-PDC ethangini lamanzi, bese uskena ngohlolo lwe-ultrasonic;

Le ndatshana iphrintwe kusuka ku- "Inethiwekhi ye-International Metalwork"