I ka wā o ke kanaka mua, ʻaʻole i hānai ka poʻe i nā holoholona e like me kā lākou meaʻai ponoʻī, no laila, ʻo nā kumu meaʻai a nā kānaka he mau hana hahai holoholona a ʻohi i nā hua o nā mea kanu. Akā, no ka weliweli loa o ka hahai holoholona, ua hana ka poʻe i nā mea hana he nui e hoʻomaikaʻi ai i kā lākou holomua o ka hahai holoholona. ʻO nā pahi iwi kekahi o lākou.
ʻO nā pahi iwi he pahi i hana ʻia mai nā iwi holoholona.
I kēia mau lā, ʻaʻole pono ka poʻe e hahai i ke kuahiwi i kēlā me kēia lā e loaʻa ai ka ʻai e hoʻopiha ai i ko lākou ʻōpū, akā, ua hoʻoili ʻia ka pahi iwi i nā kānaka ma kekahi ʻano ʻē aʻe, ʻo ia hoʻi ka pahi. ʻAʻole nā pahi o kēia mau lā ka pahi a mākou e ʻoki ai i nā mea kanu a me nā huaʻai, he nui nā ʻano pahi, e nānā kākou i kekahi o nā pahi nui.
pahi kila
ʻO ka mea maka o kēia ʻano pahi he kila, a ʻo nā pahi kila o kēia mau lā he kila kila. ʻO kona ʻano wela wela ma waena o ʻelua haneri degere Celsius a me ʻekolu haneli degere Celsius. Ma ke kaʻina hana, hoʻohana mau ʻia nā emulsions e hoʻomaʻalili i nā mea hana kila.
ʻO nā pahi kila māmā holo kiʻekiʻe
ʻOiai ua hoʻohui wale ʻia ka huaʻōlelo "wikiwiki kiʻekiʻe", ʻokoʻa loa ia mai nā pahi kila. ʻO nā pahi kila kiʻekiʻe he mau pahi i hana ʻia me ke kila kila kila kiʻekiʻe. ʻO kona kūpaʻa wela a hiki i ʻelua a ʻekolu manawa ma mua o nā pahi kila kahiko.
Hoʻohana nui ʻia nā pahi kila kila kiʻekiʻe ma ke kahua ʻoihana.
Mea Paahana ʻoki Carbide
Hiki ke ʻōlelo ʻia kēia pahi he pahi ʻoki ʻoki. Hiki ke piʻi aku kona mahana wela a hiki i 1,000 degere Celsius, ʻoi aku ka paʻakikī a me ka paʻakikī ma mua o hoʻokahi papa kiʻekiʻe ma mua o nā pahi kila kiʻekiʻe, a ʻoi aku ka maikaʻi o ka ʻaʻahu ma mua o nā pahi kila kiʻekiʻe.
ʻO kāna mau mea maka he tungsten carbide (WC), titanium carbide (TiC), tantalum carbide (TaC) a me 5-10% cobalt.
pahi seramika
ʻO ke kūpaʻa wela a me ka paʻakikī o kēia mea hana, ʻo ia hoʻi, ka pale ʻana i ka lole, he ʻanuʻu kiʻekiʻe ma mua o nā mea hana carbide cemented. ʻO nā mea nui he alumina a me ka carbide a ua puhi ʻia kekahi mau metala i kahi ʻano wela kiʻekiʻe.
No ka mea he kiʻekiʻe ka pale wela a me ke kūpaʻa ʻana, hoʻohana nui ʻia ka ʻoki maloʻo i ka ʻoki ʻana.
mea hana daimana
E like me ka inoa, ua hoʻohana kūikawā ʻia kēia ʻano mea hana no ka ʻokiʻoki. ʻO ka hemahema o nā mea hana daimana, ʻo ia ka maʻalahi o ka hāʻule ʻana o ka uhi daimana, a ʻaʻole hiki ke wānana maikaʻi ʻia.
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