Ngongo Koranu Parahi-Nikara Kounga Nui – Ātete Pai ki te Wai Moana
Ngongo Parahi Mā (Kapuro-Nikara) – Tāpiritanga Hangarau
Ka hangaia ā mātou ngongo kapuro-nikora mā roto i tētahi tukanga whakahaere katoa o te whakarewatanga tonu whakapae tino tika, te mahi makariri maha-haere, me te maimoatanga wera ā-haurangi tiaki hei whakarite i te hanganga koranu ōrite, te hanganga witi kua oti te whakapai, me te hanganga moroiti matotoru.
Te rere matua o te tukanga: Te rewa whakapūmau korehau → Te maka tonu whakapae (te pereki haurua-tonu) → Te whakaputa wera ōwehenga teitei → Te hurihuri/te tuhi matao maha-haere → Te whakamahana waenga maha i raro i te hau tiaki → Te whakaotinga whakamutunga → Te au hurihuri 100% + te whakamātautau ultrasonic (e hiahiatia ana).
Ko te mana whakahaere kounga e tino hipa ana i ngā paerewa ā-motu me ASTM me ngā whakaritenga ā-roto:
● Te hanganga matū: Ia wera kua manatokohia e te ine-pānui tika; ko te rerekētanga o ngā huānga matua (Cu+Ni+Fe+Mn) e whakahaeretia ana i roto i te ±0.05%
● Rahi o te witi: Kia mau tonu ki te 0.015–0.035 mm, kāore he witi whakauru
● Ngā āhuatanga miihini: Whakamātautau puranga katoa o te kaha kume, te kaha tuku, me te roa; te tauwehenga rerekētanga (CV) < 3%
● Ngā ātete ā-ahu: OD ±0.015 mm, WT ±0.008 mm, porowhita ≤ 0.02 mm
● Whakaotinga mata: Mata o roto, o waho Ra ≤ 0.4 μm, kāore he tae waikura, he karawarawa, he ngatata rānei
● NDT: Whakamātautau au hurihuri 100% e ai ki te EN 1971 Akomanga A; kei te wātea ngā whakamātautau ultrasonic mēnā ka tonoa
● Te horoi ā-roto: He pai ake te horoi o te mata o roto i te IGC-Test Grade 1, he pai mō te hauwai pēhanga teitei, ngā pouaka whakamātao, me ētahi atu mea nui
Kua whakamahia ponotia ēnei ngongo ki roto i te hangarau moana, ngā paipa wai moana kaipuke, ngā whakawhiti wera, ngā raina taputapu mana karihi, me ngā pūnaha rokiroki me te kawe hauwai pēhanga teitei. Kua whakatūria e mātou he hononga tuku mō te wā roa me ngā kamupene ārahi maha o te ahumahi, ā, kei te pupuri tonu mātou i te kaha ā-tau o te 8,000 tana o ngā ngongo kapu-nikora mahi teitei. Kei te wātea te hanga ritenga kia rite ki ngā tuhi a te kiritaki, ki ngā paerewa rānei pērā i te AMS 4574, CuNi30, C71500, BNi-2, me ētahi atu.
