Ko ngā pereti maitai kore waikura 201 me te 304 e rua o ngā momo e whakamahia whānuitia ana i roto i te maitai kore waikura austenitic. Ko tō rāua rerekētanga matua kei roto i te hanganga matū (te nui o te nikara me te chromium), ā, ka hua ake he rerekētanga motuhake i roto i te ātete ki te waikura, ngā āhuatanga miihini, te utu, me ngā āhuatanga tono. Kei raro nei he whakataurite taipitopito:
1. Rerekētanga Matua: Te Hanganga Matū
Ko te nikara (Ni) me te konukōmiuma (Cr) ngā mea matua mō te ātete ki te waikura o te maitai kore waikura. Ko te rerekētanga o te ihirangi ko te rerekētanga matua i waenga i ngā momo e rua:
| Tau | Te Ihirangi o te Chromium (Cr) | Te Ihirangi o te Nikara (Ni) | Te Ihirangi o te Manganese (Mn) | Te Ihirangi Waro (C) | Āhuatanga Whakakapinga |
|---|---|---|---|---|---|
| 201 Kowiri tira | 16%–18% | 3.5%–5.5% | 5.5%–7.5% | ≤0.15% | Ka whakamahia he konupora nui hei whakakapi i tētahi wāhanga o te nikara hei whakaiti i te utu |
| 304 Kowiri tira | 18%–20% | 8%–10.5% | ≤2% | ≤0.08% | He nui te ihirangi nikara me te konukōmiuma, kāore he whakakapinga manganese |
2. Ngā Rerekētanga Matua o te Mahi
(1) Ātete ki te Waikura
- 201 Kowiri tira: He iti te ātete ki te waikura. Ka taea anake te tu atu ki ngā taiao maroke o roto, ki ngā āhuatanga haumākū paku rānei. Ka ngāwari te waikura i ngā taiao takutai moana, waikawa-kawakawa, kohu tote nui rānei, inā koa i ngā hononga whakarewa.
- Kowiri tira 304: He ātete pai ki te waikura. Ka taea e ia te ātete ki te haumākū, ki ngā waikawa ngoikore me ngā kawakore, me te ua o waho. Koinei te whiringa matua mō ngā tono kai me ngā tono ā-iwi, e tutuki ana i ngā whakaritenga ā-waikura o ia rā.
(2) Ngā Āhuatanga Mīhini
- 201 Kowiri tira: He pakari ake, he kaha ake, engari he iti iho i te 304 te ngāwari me te pakari. Ka pakaru i te wā e tukatukahia ana, ā, he ngoikore te piko me te totoro.
- Kowiri tira 304: He pai te ngāwari me te pakari, he ngāwari ki te piko, ki te tā, me te whakarewa. Kāore e ngāwari ki te hurihanga, ki te ngatata rānei i muri i te tukatuka, he mea e tika ana mō ngā āhuatanga hanga uaua.
(3) Ātete ki te pāmahana teitei
- 201 Kowiri tira: Ko te ātete pāmahana mōrahi kei te 300℃; ka ngawari ki te waikura me te whakarerekē i te āhua i tua atu i tēnei pāmahana.
- Kowiri tira 304: Ko te ātete pāmahana mōrahi kei te 800℃, e tika ana mō ngā taiao pāmahana reo me te pāmahana teitei pērā i ngā oumu me ngā tāke o roto o te whakamahana wai.
(4) Te utu
- 201 Kowiri tira: Nā te iti o te ihirangi nikara, he 30%–50% te iti ake o te utu i te 304, ā, he kounga kowiri tira whai hua.
- 304 Kowiri tira: He utu teitei ake, ā, koinei te rauemi paerewa mō ngā mahi ā-iwi me ngā mahi kai.
3. Whakataurite i te Horopaki Taupānga
| 201 Ngā Whakamahinga Pereti Kowiri tira | Ngā Whakamahinga Pereti Kowiri tira 304 |
|---|---|
| Ngā whakapaipai maroke o roto (ngā anga tatau, ngā whata, ngā papa pānuitanga) | Ngā taputapu kīhini (ngā totohu, ngā taputapu kīhini, ngā kāpata patu huakita) |
| Ngā wāhanga hanganga kore-kawenga, ngā ārai, ngā kupenga ārai-tahae | Ngā taputapu tukatuka kai, ngā taputapu hauora, ngā paipa wai inu |
| Ngā taiapa o waho kāore e hiahiatia ana (ngā wāhi kāore i te takutai moana/ngā wāhi tino waikura) | Ngā pakitara ārai o waho, ngā reera o te taupee, ngā tāke o roto o te whakamahana wai |
| Ngā whata rokiroki rangitahi, ngā kaata ringaringa | Ngā ipu matū, ngā taputapu horoi, ngā ipu korehau |
4. Ngā Tohutohu Tautuhi Tere
- Te mimiti o te aukume: He nui te konupūmā o te 201, ā, he kaha ake te aukume i te 304, nō reira he piri pūmau ake ki te aukume. Kāore he aukume o te 304, he aukume ngoikore rānei.
- Tirohanga Tirohanga: He puhoi ake te kanapa o te mata 201, ā, he ngāwari ki te waikura, ko te mata ia o te 304 he kanapa ake, he ma ake, ā, kāore e ngāwari ki te waikura ina roa te whakamahinga.
- Whakamātautau Matū Tauhohenga: Whakamahia he wai tautuhi maitai kore waikura. Ina maturuturu ki runga i te pereti, ka huri tere te 201 ki te whero, engari kāore te 304 e whakaatu i te huringa tae e kitea ana (he tino tika, he pai mō te whakamātautau i te papaanga).
Wā tuku: Hakihea-18-2025