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daimana synthetic

Hoʻohana pinepine ʻia ka daimana e wehewehe i nā kīʻaha liʻiliʻi (≈0.00004 in.) o ke daimana synthetic i hoʻohana ʻia ma ke ʻano he kī nui no nā mea ʻoki PDC.Ma ke ʻano o nā kemika a me nā waiwai, ua like ke daimana i hana ʻia me ke daimana maoli.ʻO ka hana ʻana i ka daimana kaʻina hana maʻalahi: ua wela ke kalapona maʻamau ma lalo o ke kaomi kiʻekiʻe a me ka wela.I ka hoʻomaʻamaʻa naʻe, ʻaʻole maʻalahi ka hana daimana.

ʻO nā kristal daimana pākahi i loko o ka daimana grit he ʻano like ʻole.ʻO kēia ka mea i ikaika, ʻoi aku ka ikaika, a no ka paʻakikī o ke daimana i loko, ʻaʻole hiki ke ʻaʻahu.ʻO ka ʻoiaʻiʻo, ʻoi aku ka maikaʻi o ka hana maʻamau i loaʻa i ke daimana synthetic i hoʻopaʻa ʻia ma ka ʻako ʻana ma mua o nā daimana maoli, no ka mea, ʻo nā daimana maoli he mau kristal cubic e haki maʻalahi ma ko lākou mau palena, nā palena crystalline.

ʻAʻole paʻa ka paʻa o ka daimana ma nā wela kiʻekiʻe ma mua o ke daimana maoli.No ka mea, ʻoi aku ka nui o ka hoʻonui ʻana o ka wela ma mua o ke daimana, ka hoʻonui ʻokoʻa e waiho i nā kaula daimana-a-daimana ma lalo o ke ʻoki ʻana, a inā he kiʻekiʻe nā ukana, e hāʻule.Inā hāʻule nā ​​paʻa, nalowale koke nā daimana, no laila, nalowale ka PDC i kona paʻakikī a me ka ʻoi a lilo i mea ʻole.No ka pale ʻana i kēlā hemahema, pono e hoʻomaʻalili maikaʻi nā mea ʻoki PDC i ka wā wili.

Nā papa ʻaina daimana

No ka hana ʻana i ka papaʻaina daimana, ua hoʻopaʻa ʻia ka daimana grit me ka tungsten carbide a me ka mea hoʻopaʻa metala e hana i kahi papa waiwai daimana.He ʻano wafer lākou, a pono e hana ʻia e like me ka mānoanoa e like me ka hiki, no ka mea, hoʻonui ka nui o ka daimana i ke ola o ka lole.ʻO nā papa daimana kiʻekiʻe loa he ≈2 a 4 mm, a ʻo ka holomua ʻenehana e hoʻonui i ka mānoanoa papaʻaina daimana.He ≈0.5 inika ke kiʻekiʻe o nā substrate tungsten carbide a loaʻa ke ʻano keʻa a me nā ana like me ka papa daimana.ʻO nā ʻāpana ʻelua, ka papa daimana a me ka substrate, e hana i kahi ʻoki (Fig. 4).

ʻO ka hoʻokumu ʻana i ka PDC i mau ʻano kūpono no nā mea ʻokiʻoki e pili ana i ka waiho ʻana i ka ʻeke daimana, me kāna pani, i loko o kahi ipu kaomi a laila sintering i ka wela a me ke kaomi.

ʻAʻole hiki ke ʻae ʻia nā mea ʻoki PDC ma mua o ka mahana o 1,382°F [750°C].ʻO ka wela nui ka mea hiki ke komo wikiwiki, no ka mea, ʻokoʻa ka hoʻonui ʻana i ka wela ma waena o ka mea hoʻopaʻa a me ke daimana e uhaʻi i nā kristal grit daimana intergrown i ka papa daimana.Hoʻopilikia pū ʻia nā ikaika paʻa ma waena o ka papa daimana a me ka substrate tungsten carbide e ka hoʻonui ʻana i ka wela.