Ngā ngongo arai uku alumina ātete-mauhe wāhanga tiaki nui e whakamahia whānuitia ana i roto i ngā pūnaha paipa ahumahi e pāngia ana e te pakaru kino. Ko te hanganga matua ko te alpha-alumina (Al₂O₃), ko te ihirangi kei waenga i te 92% ki te 99.5%. Ka hangaia tēnei rauemi mā te tukanga sintering pāmahana-teitei, ka hua ake he pakeke tino pai, me te pakeke Rockwell (HRA) o te ≥85 me te whakatauranga pakeke Mohs o te 9, ko te tuarua anake ki te taimana. Ka herea pai ēnei ngongo raina, ka whakauruhia rānei ki te pakitara o roto o ngā paipa whakarewa, ka hanga he arai tiaki pakari e wehe ana i te reo rere mai i te horoi tika me te kakahu i runga i te tinana paipa whakarewa.
Ko tā rātou mahi tino pai i ahu mai i ngā āhuatanga tūturu o ngā uku alumina. Haunga te pakeke teitei, ko te nuinga o te wā he >3.6 g/cm³ tōna matotoru, me te kaha pēhi neke atu i te 850 MPa. Ko te ātete kakahu o ēnei arai uku he tata ki te 266 ngā wā i te maitai manganese me te 171.5 ngā wā i te rino maka konupora-teitei, e whakaroa ana i te roa o te ratonga taputapu mā te 5 ki te 10 ngā wā i raro i ngā āhuatanga mahi rite. Ko tō rātou mata maeneene me te iti o te tauwehenga o te waku ka whakaiti i te ātete kawe. He tino pai hoki te ātete waikura, e tu atu ana ki te nuinga o ngā rauemi matū engari ko te waikawa hauwaiwai me ngā kawakawa wera kua kukū.
Ko te nuinga o te wā, ka whakamahia tēnei hua i roto i ngā rāngai ahumahi me ngā tono kaha mō te ātete ki te kakahu. Ko ngā tono noa ko te kawe waro, te whāngai wahie kua paura, me ngā pūnaha tango pungarehu i roto i ngā tipu hiko wera; ngā paipa kawe waro me te paura konganuku kua paura i roto i ngā mira maitai; ngā raina whakawhiti paraoa mata, kirīni, me te paura waro i roto i ngā tipu sima; me ngā pūnaha kawe paru me te paru kukū i roto i ngā mahi keri. He whānuitia hoki te whakamahinga i roto i ngā paipa kawe hau me te waipēhi i roto i ngā ahumahi whakarewa, matū, me ētahi atu ahumahi, e whai hua ana ki te whakatika i ngā take o te kakahu tere o ngā paipa, te pakaru, me te turuturu i puta mai i te horoinga rauemi roa.
Hei whakarāpopototanga, ka whakaratohia e ngā ngongo arai uku alumina ātete-kakahu he tiaki roa mō ngā paipa kawe ahumahi nā te mea he tino pakeke, he tino kakahu, he ātete hoki ki te waikura. Ka whakaitihia e rātou te auau o te kati mō ngā utu tiaki me te whakakapinga i puta mai i te kakahu o ngā paipa, ka whakarei ake i te whai huatanga o te mahi me te haumaru o ngā pūnaha whakaputa. He otinga tiaki kua whakamātauhia, he utu-pai hoki ēnei.
Wā tuku: Hakihea-24-2025