Ngongo Rapa Ukume Alumina Ātete-Kakahu: Hanganga, Āhuatanga, me Ngā Whakamahinga

Ko te ngongo rapa uku alumina ātete-kakahu he hua paipa ahumahi i hangaia mā te whakakotahi i ngā taera uku alumina pakeke-teitei me te anga rapa ngāwari mā te tukanga whakamomona. Ko te uku alumina kua whakauruhia (ko te tikanga he ihirangi Al₂O₃ o ≥92%) he tino pakeke (Rockwell hardness HRA ≥88), e whakaatu ana i te ātete kakahu neke atu i te tekau ngā wā i te rino maka konupora-teitei. Ko te paparanga rapa o waho e whakarato ana i te ngongo ki te ngāwari me ngā āhuatanga hiri pai, e taea ai e ia te piko me te mimiti i ngā wiri pānga i raro i ngā tikanga mahi uaua. Mā tēnei hoahoa hanganga ka whakauruhia te ātete kakahu o ngā uku ki ngā āhuatanga whakaruru o te rapa, e pai ai mō te kawe i ngā rauemi kakahu-teitei i roto i ngā ahumahi pēnei i te keri, te whakaputa hiko, me te sima.

Mō ngā tawhā mahi, he rerekē ngā whakaritenga hangarau o tēnei hua i runga i ngā whakaritenga tono. Ko te matotoru o te paparanga uku he ≥3.6 g/cm³, ā, ko te kaha piko he neke atu i te 290MPa. Ahakoa ka taea te tu atu i ngā pāmahana teitei tae atu ki te 1400°C, ko te pāmahana mahi mō te wā roa ka whakahaerehia i waenga i te -30°C me te 150°C i roto i te mahi tonu nā ngā herenga pāmahana o te paparanga rapa. He ngāwari ngā whakaritenga ngongo, me ngā diameter ingoa mai i te 25mm ki te 1200mm, te roa takitahi tae atu ki te 20 mita, me ngā taumata pēhanga mahi i waenga i te 1MPa me te 4MPa. Hei tāpiri, he maha ngā wā ka hangaia ngā taera uku ki ngā āhua hexagonal, porowhita rānei, ā, he tika te whakaritenga me te whakamomona kia pai ai te pakitara o roto maeneene me te ātete wai iti.

Ngā ngongo rapa uku alumina ātete-maue whakamahia whānuitia ana i roto i ngā pūnaha kawe rauemi rere maha-wāhanga totoka-wai-hau. I roto i ngā tipu hiko waro, ka whakamahia ēnei mō te kawe hau o te pungarehu rere me te waro paura. I roto i te umanga maitai, ka whakamahia ēnei mō te werohanga waro paura me te kawe i te rino kukū. I roto i te rāngai matū, mā te whakamahi i te ātete waikura o ngā uku, ka taea e ēnei ngongo te kawe i ngā paru waikura kei roto ngā waikawa, ngā kawakore, me ngā tote. Hei tāpiri, i roto i ngā mahi keri tauranga me te papu raima, ko tēnei paipa, me ōna painga rua o te ātete pānga me te ātete kakahu, ka roa ake te huringa tiaki me te roa o te ratonga o te pūnaha paipa, ā, ka whakaitihia ngā utu whakahaere me te tiaki whānui.