PDC leaching

Background

Ua hoʻohana ʻia ka polycrystalline diamond compacts (PDC) i nā noi ʻoihana, me nā noi wili pōhaku a me nā noi mīkini metala. Ua hōʻike ʻia kēlā mau compacts i nā mea maikaʻi ma mua o kekahi mau ʻano ʻokiʻoki ʻē aʻe, e like me ke kūpaʻa ʻoi aku ka maikaʻi a me ka pale ʻana i ka hopena. Hiki ke hoʻokumu ʻia ka PDC ma o ka hoʻopaʻa ʻana i nā ʻāpana daimana pākahi ma lalo o ke kūlana kiʻekiʻe a me ke kiʻekiʻe wela (HPHT), ma ke alo o kahi catalyst/solvent e hoʻoikaika i ka hoʻopaʻa daimana-diamond. ʻO kekahi mau laʻana o ka catalyst/solvents no nā kopa daimana sintered he cobalt, nickel, hao, a me nā metala ʻē aʻe o ka hui VIII. Loaʻa i nā PDC kahi mea daimana ma mua o kanahiku pākēneka ma ka leo, a ma kahi o kanawalu pākēneka a hiki i kanaiwakūmāwalu pākēneka he ʻano maʻamau. Hoʻopaʻa ʻia ʻo PDC i kahi substrate, a laila e hana ai i kahi ʻoki PDC, hiki ke hoʻokomo ʻia i loko, a i ʻole ke kau ʻia i kahi mea hana iho e like me ka drill bit a i ʻole reamer.

PDC leaching

Hana ʻia nā mea ʻoki PDC e ka tungsten carbide substrate a me ka pauka daimana ma lalo o ke kiʻekiʻe kiʻekiʻe a me ke kaomi kiʻekiʻe. ʻO Cobalt kahi mea hoʻopaʻa. Hoʻopau kemika ke kaʻina leaching i ka hoʻoheheʻe kobalt i loaʻa kahi ʻano polycrystalline. ʻO ka hopena he papa daimana me ka hoʻomaikaʻi ʻana i ka pale ʻana i ka hoʻohaʻahaʻa ʻana i ka wela a me ka ʻaʻahu abrasive, e hopena i kahi ola ʻokiʻoki ʻoi aku ka maikaʻi.. Hoʻopau maʻamau kēia kaʻina hana ma mua o 10 mau hola ma lalo o 500 a 600 degere e ka umu ahi. ʻO ke kumu o ka leached e hoʻonui i ka paʻakikī o ka PDC. ʻO ka mea maʻamau, ʻo ka māla aila wale nō ka PDC e hoʻohana i kēia ʻenehana, no ka mea ʻoi aku ka paʻakikī o ka ʻoihana hana o ka māla aila.

PōkoleMoolelo

I ka makahiki 1980, ua aʻo ʻo GE Company (USA) a me Sumitomo Company (Iapana) i ka wehe ʻana o ka cobalt mai ka ʻili hana o nā niho PDC e hoʻomaikaʻi i ka hana hana o nā niho. Akā ʻaʻole lākou i hoʻokō i ka kūleʻa pāʻoihana. Ua kūkulu hou ʻia kahi ʻenehana a hoʻopaʻa ʻia e Hycalog（USA）. Ua hōʻoia ʻia inā hiki ke hoʻoneʻe ʻia ka mea metala mai ka ʻāpana palaoa, e hoʻomaikaʻi maikaʻi ʻia ke kūpaʻa wela o nā niho PDC i hiki ai i ka bit ke ʻoi aku ka maikaʻi o ka wili ʻana i nā hana ʻoi aku ka paʻakikī. Hoʻomaikaʻi kēia ʻenehana hoʻoneʻe cobalt i ka pale ʻana o nā niho PDC i nā ʻano pōhaku paʻakikī a hoʻomāhuahua hou aʻe i ka hoʻohana ʻana o nā bits PDC.