I. Mmebi okpomọkụ na mwepụ nke kobalt nke PDC
N'ime usoro nhazi nrụgide dị elu nke PDC, cobalt na-arụ ọrụ dị ka ihe na-akpali akpali iji kwalite njikọta kpọmkwem nke dayamọnd na dayamọnd, ma mee ka oyi akwa dayamọnd na tungsten carbide matrix ghọọ ihe zuru oke, na-eme ka ezé ịkpụ PDC dị mma maka igwu ala mmanụ na ike dị elu na iguzogide iyi dị mma,
Ike iguzogide okpomọkụ nke dayamọnd dị oke oke. N'okpuru nrụgide ikuku, elu dayamọnd nwere ike ịgbanwe na okpomọkụ dị ihe dịka 900℃ ma ọ bụ karịa. N'oge eji ya, PDC ọdịnala na-emebi ihe na ihe dịka 750℃. Mgbe a na-egwupụta ihe site na akwa nkume siri ike ma na-emebi emebi, PDC nwere ike iru okpomọkụ a ngwa ngwa n'ihi okpomọkụ na-akpata esemokwu, okpomọkụ ozugbo (ya bụ, okpomọkụ mpaghara na ọkwa microscopic) nwekwara ike ịdị elu karịa, karịa ebe agbaze nke kobalt (1495°C).
Ma e jiri ya tụnyere dayamọnd dị ọcha, n'ihi na ọ dị na kobalt, dayamọnd na-agbanwe ghọọ graphite na obere okpomọkụ. N'ihi ya, mmetọ na dayamọnd na-esi na graphitization nke sitere na okpomọkụ esemokwu mpaghara pụta. Na mgbakwunye, oke mgbasawanye okpomọkụ nke kobalt dị elu karịa nke dayamọnd, yabụ n'oge okpomọkụ, njikọ dị n'etiti mkpụrụ dayamọnd nwere ike imebi site na mmụba nke kobalt.
Na 1983, ndị nchọpụta abụọ mere ọgwụgwọ iwepụ dayamọnd n'elu oyi akwa dayamọnd PDC nkịtị, nke mere ka arụmọrụ nke ezé PDC dịkwuo mma. Agbanyeghị, ihe mepụtara a enwetaghị nlebara anya kwesịrị ya. Ọ bụ naanị mgbe afọ 2000 gasịrị ka, site n'ịghọta oyi akwa dayamọnd PDC miri emi, ndị na-ebubata ihe eji egwu mmiri malitere itinye teknụzụ a n'ezé PDC eji eme ihe n'igwu nkume. Ezé e ji usoro a gwọọ dabara adaba maka nhazi nke na-emebi emebi nke ukwuu nke nwere ike imebi igwe ma a na-akpọkarị ya ezé "de-cobalt".
A na-eme ihe a na-akpọ "de-cobalt" n'ụzọ ọdịnala iji mepụta PDC, wee mikpuo elu nke oyi akwa diamond ya na acid siri ike iji wepụ usoro cobalt site na usoro ịcha acid. Omimi nke mwepụ cobalt nwere ike iru ihe dị ka micron 200.
E mere nnwale iyi dị arọ n'ezé abụọ yiri nke PDC (otu n'ime ha ewepụla cobalt n'elu oyi akwa diamond). Mgbe e bechara granite 5000m, achọpụtara na ọsọ iyi nke PDC nke na-abụghị cobalt malitere ịbawanye nke ukwuu. N'ụzọ dị iche, PDC nke kobalt wepụrụ nọgidere na-enwe ọsọ ịkpụcha ihe kwụsiri ike ebe ọ na-egbu ihe dị ka mita 15000 nke nkume.
2. Ụzọ nchọpụta nke PDC
E nwere ụdị ụzọ abụọ e si achọpụta ezé PDC, ya bụ, nnwale na-emebi ihe na nnwale na-anaghị emebi ihe.
1. Nnwale mbibi
E bu n'obi ule ndị a ka ha na-eme ka ọnọdụ dị n'okpuru ala dị ka o kwere mee iji nyochaa arụmọrụ nke ịkpụ ezé n'ọnọdụ ndị dị otú ahụ. Ụdị nnwale mbibi abụọ bụ isi bụ ule iguzogide iyi na ule iguzogide mmetụta.
(1) Ule iguzogide iyi
A na-eji ụdị akụrụngwa atọ eme ule iguzogide iyi PDC:
A. Lathe kwụ ọtọ (VTL)
N'oge ule ahụ, buru ụzọ tinye ihe PDC na ihe VTL lathe ma tinye ihe nlele nkume (nke na-abụkarị granite) n'akụkụ ihe PDC bit. Mgbe ahụ tụgharịa ihe nlele nkume gburugburu ihe nlele lathe na ọsọ ụfọdụ. Ihe PDC bit na-agbaji ihe nlele nkume ahụ na omimi kpọmkwem. Mgbe ị na-eji granite maka nnwale, omimi ịkpụ a na-erughị 1 mm. Nnwale a nwere ike ịbụ ma akọrọ ma ọ bụ mmiri mmiri. Na "nnwale VTL akọrọ," mgbe ihe PDC bit na-agbaji n'ime nkume ahụ, a naghị etinye oyi; okpomọkụ niile a na-emepụta na-abanye na PDC, na-eme ka usoro eserese nke diamond ahụ dịkwuo ngwa ngwa. Usoro nnwale a na-enye nsonaazụ dị mma mgbe a na-enyocha ihe PDC bits n'okpuru ọnọdụ chọrọ nrụgide dị elu ma ọ bụ ọsọ ntụgharị dị elu.
"Nnwale VTL mmiri mmiri" na-achọpụta ndụ PDC n'okpuru ọnọdụ okpomọkụ dị mma site na iji mmiri ma ọ bụ ikuku mee ka ezé PDC dị jụụ n'oge nnwale. Ya mere, isi ihe na-emebi ule a bụ ịkpụcha ihe nlele nkume kama ịbụ ihe na-ekpo ọkụ.
B, lathe kwụ ọtọ
A na-ejikwa granite eme ule a, ụkpụrụ nke ule ahụ bụ otu ihe ahụ dị ka VTL. Oge ule ahụ bụ naanị nkeji ole na ole, oke okpomọkụ dị n'etiti granite na ezé PDC pere mpe.
Usoro nnwale granite nke ndị na-ebunye ngwa PDC na-eji ga-adị iche. Dịka ọmụmaatụ, usoro nnwale nke Synthetic Corporation na DI Company na United States ji abụghị otu ihe ahụ kpọmkwem, mana ha na-eji otu ihe granite ahụ maka nnwale ha, nkume polycrystalline nke dị nro ruo nke dị ọkara nke nwere obere porosity na ike nrụgide nke 190MPa.
C. Ngwa nha nha abrasion
N'okpuru ọnọdụ akọwapụtara, a na-eji akwa diamond nke PDC ewepụ wiilị silicon carbide, a na-ewerekwa oke nke ọsọ iyi nke wiilị egweri na ọnụego iyi nke PDC dị ka ihe nrịbama iyi nke PDC, nke a na-akpọ oke iyi.
(2) Ule iguzogide mmetụta
Usoro maka nnwale mmetụta gụnyere itinye ezé PDC n'akụkụ ogo 15-25 wee tụda ihe site n'ogo ụfọdụ iji kụọ oyi akwa diamond na ezé PDC kwụ ọtọ. Ibu na ịdị elu nke ihe na-ada ada na-egosi ọkwa ike mmetụta nke ezé nnwale ahụ na-enweta, nke nwere ike ịbawanye nwayọ ruo joules 100. Enwere ike imetụta ezé ọ bụla ugboro 3-7 ruo mgbe a gaghị anwale ya ọzọ. N'ozuzu, a na-anwale ma ọ dịkarịa ala ihe nlele iri nke ụdị ezé ọ bụla na ọkwa ike ọ bụla. Ebe ọ bụ na enwere oke na iguzogide ezé na mmetụta, nsonaazụ ule na ọkwa ike ọ bụla bụ nkezi mpaghara nke diamond na-agba mgbe mmetụta gasịrị maka ezé ọ bụla.
2. Nnwale na-anaghị emebi emebi
Usoro nnwale na-anaghị emebi emebi nke a na-ejikarị eme ihe (ewezuga nyocha anya na nke obere ihe) bụ nyocha ultrasound (Cscan).
Teknụzụ nyocha C nwere ike ịchọpụta obere ntụpọ ma chọpụta ebe na nha ntụpọ ndị ahụ dị. Mgbe ị na-eme nnwale a, buru ụzọ tinye ezé PDC n'ime tankị mmiri, wee jiri nyocha ultrasonic nyochaa ya;
E bipụtara akụkọ a ọzọ site na "Netwọk Ọrụ Metal nke Mba Nile"
Oge ozi: Maachị-21-2025
