1. Ngā Āhuatanga Ā-ringa o te Kowiri tira
Ko ngā āhuatanga miihini e hiahiatia ana ka hoatuhia i roto i ngā whakaritenga hoko mō te maitai kore waikura. Ko ngā āhuatanga miihini iti rawa hoki ka hoatuhia e ngā paerewa rerekē e pā ana ki te rauemi me te āhua o te hua. Ko te tutuki i ēnei āhuatanga miihini paerewa e tohu ana kua hangaia tika te rauemi ki tētahi pūnaha kounga tika. Kātahi ka taea e ngā miihini te whakamahi māia i te rauemi i roto i ngā hanganga e tutuki ana i ngā kawenga mahi haumaru me ngā pēhanga.
Ko ngā āhuatanga hangarau e tohua ana mō ngā hua hurihuri papatahi ko te kaha kume, te ahotea hua (te ahotea ārai rānei), te roa me te pakeke Brinell, Rockwell rānei. Ko ngā whakaritenga āhuatanga mō te pae, te ngongo, te paipa me ngā hononga e whakaatu ana i te kaha kume me te ahotea hua.
2. Te Kaha Putanga o te Kowiri tira
He rerekē tēnei i ngā maitai ngāwari, he iti noa iho te kaha whakaputa o te maitai kore waikura austenitic kua whakamahanatia i te kaha kume. Ko te kaha whakaputa o te maitai ngāwari he 65-70% noa iho o te kaha kume. Ko tēnei whika he 40-45% noa iho i roto i te whānau maitai kore waikura austenitic.
Ka tere te mahi mātao, ā, ka nui ake te kaha o te whakarewa. Ko ētahi momo maitai kore waikura, pērā i te waea kua whakamaroketia ki te puna, ka taea te mahi mātao hei whakapiki i te kaha whakarewa ki te 80-95% o te kaha kume.
3. Te ngāwari o te maitai kore waikura
Mā te whakakotahitanga o ngā tere whakapakeketanga teitei me te roa/ngāwaritanga teitei ka tino māmā te hanga i te maitai kore waikura. Mā tēnei āhuatanga, ka taea te whakapōturi rawa te maitai kore waikura i roto i ngā mahi pēnei i te kukume hōhonu.
Ko te ngāwari o te ngohe ka inehia hei % te roa i mua i te whati i te wā whakamātautau kume. He tino teitei te roa o ngā maitai kore waikura austenitic kua whakawerahia. Ko ngā tatauranga noa ko te 60-70%.
4. Te pakeke o te maitai kore waikura
Ko te pakeketanga ko te ātete ki te urunga ki te mata o te rauemi. Ka inehia e ngā mīhini whakamātautau pakeketanga te hohonutanga ka taea te pana i tētahi kōhao tino mārō ki roto i te mata o tētahi rauemi. Ka whakamahia ngā mīhini Brinell, Rockwell me Vickers. He rerekē te āhua o ia kōhao me te tikanga whakamahi i te kaha e mōhiotia ana. Nō reira, he tata noa iho ngā huringa i waenga i ngā tauine rerekē.
Ka taea te whakapakeke i ngā momo whakapakeke martensitic me te precipitation mā te maimoatanga wera. Ka taea te whakapakeke i ētahi atu momo mā te mahi matao.
5. Te Kaha Kume o te Kowiri tira
Ko te kaha kume anake te āhuatanga ā-pūkaha e hiahiatia ana hei tautuhi i ngā hua pae me te waea. Ka taea te whakamahi i ngā momo rauemi ōrite i ngā kaha kume rerekē mō ngā tono tino rerekē. Ko te kaha kume e tukuna ana o ngā hua pae me te waea e pā tika ana ki te whakamahinga whakamutunga i muri i te hanganga.
Ko te waea puna te mea tino kaha te kume i muri i te hanganga. Ka puta te kaha nui mā te mahi matao ki roto i ngā puna kopikopiko. Ki te kore tēnei kaha nui, e kore te waea e mahi tika hei puna.
Kāore e hiahiatia he kaha kume teitei pēnei hei whakamahi i te waea i roto i ngā mahi hanga, raranga rānei. Ko te waea, ko te pae rānei e whakamahia ana hei rauemi mata mō ngā whakapiri, pērā i ngā pūtu me ngā tīwiri, me ngohengohe kia taea ai te hanga i te pane me te miro, engari me kaha tonu kia pai ai te mahi i roto i te mahi.
He rerekē te kaha kume me te kaha whakaputa o ngā whānau rerekē o te maitai kore waikura. Kua whakarārangihia ēnei kaha noa mō ngā rauemi kua whakamahanatia ki te Ripanga 1.
Ripanga 1. Kaha noa mō te maitai kore waikura kua whakamahanatia mai i ngā whānau rerekē
| Kaha Kume | Te Kaha o te Hua | |
| Austenitic | 600 | 250 |
| Takirua | 700 | 450 |
| Ferritic | 500 | 280 |
| Martensitic | 650 | 350 |
| Te whakapakeketanga o te ua | 1100 | 1000 |
6. Ngā Āhuatanga Ā-tinana o te Kowiri tira
● Ātete ki te waikura
● Te ātete ki te pāmahana teitei me te pāmahana iti
● Ngāwari o te hanga
● Kaha Teitei
● Ātaahua
● Te akuaku me te ngāwari o te horoi
● Huringa ora roa
● Ka taea te hangarua
● He iti te uruhanga aukume
7. Te Ātete ki te Waikura o te Kowiri tira
He āhuatanga pai te ātete ki te waikura o ngā maitai kore waikura katoa. Ka taea e ngā koranu iti te ātete ki te waikura i ngā āhuatanga noa. Ka ātete ngā koranu teitei ki te waikura e te nuinga o ngā waikawa, ngā otinga kawakore me ngā taiao pūhaumāota.
Ko te ātete ki te waikura o te maitai kore waikura nā te nui o te chromium. I te nuinga o te wā, kei roto i te maitai kore waikura te iti rawa o te 10.5% chromium. Ka hangaia e te chromium i roto i te koranu he paparanga waikura mārama e whakaora ana i a ia anō ka puta noa i te hau. Ko te āhua whakaora-ā-ia anō o te paparanga waikura ko te tikanga ka mau tonu te ātete ki te waikura ahakoa ngā tikanga hanga. Ahakoa ka tapahia, ka pakaru rānei te mata o te rauemi, ka ora anō ia, ā, ka mau tonu te ātete ki te waikura.
8. Ātete ki te pāmahana tino nui
Ka taea e ētahi momo maitai kore waikura te ātete ki te tauine me te pupuri i te kaha teitei i ngā pāmahana tino teitei. Ko ētahi atu momo ka pupuri i ngā āhuatanga miihini teitei i ngā pāmahana cryogenic.
Te Kaha Teitei o te Kowiri tira
Ka taea te whakarerekē i ngā hoahoa wāhanga me ngā tikanga hanga hei whakamahi i te whakapakeketanga mahi o ngā maitai kore waikura e puta ana i te wā e mahi matao ana. Mā ngā kaha teitei ka taea te whakamahi i ngā rauemi angiangi, ka iti ake te taumaha me ngā utu.
Ko Jindalai Steel Group tētahi o ngā kaihanga me ngā kaihokohoko matua o te koiri/pepa/pereti/rīpene/paipa rino kore waikura. Neke atu i te 20 tau te roa o te whanaketanga i roto i ngā mākete o te ao, ā, e rua ā mātou wheketere me te kaha whakaputa neke atu i te 400,000 tana ia tau. Mena kei te hiahia koe ki ētahi atu kōrero mō ngā rauemi rino kore waikura, nau mai whakapiri mai ki a mātou i tēnei rā, tono utu rānei.
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Wā tuku: Hakihea-19-2022
