ngongo tuitui whakakoi matao din2391 st52 mō te tukatuka miihini
whakataki
I te ao o te hangarau tika me te tukatuka miihini, he mea nui te whiriwhiri i ngā rauemi hei whakarite i te mahi tino pai me te roa o te ora o ngā mīhini. Ko te din2391 st52 i kōkirihia i roto i te makariri Ngongo Tuitui Whakakotahitia kua puta ake hei whiringa pai mō ngā momo tono miihini nā ōna āhuatanga tino pai. Ka rukuhia e tēnei tuhinga ngā āhuatanga mahi, ngā whakatakotoranga rauemi, me ngā tono o ēnei ngongo i roto i ngā taputapu tukatuka miihini.
ngā āhuatanga mahi hua
Kua hangaia ngā ngongo din2391 st52 kia tutuki ai ngā paerewa teitei o te kaha me te manawanui. Anei ētahi o ngā āhuatanga mahi matua:
| **taonga** | **uara** |
|----------------------------------|---------------------------|
| kaha hua | ≥ 350 mpa |
| kaha kume mutunga | ≥ 500 mpa |
| te roa i te whati | ≥ 10% |
| mārō | ≤ 250 hb |
| kiato | ~ 7.85 karamu/cm³ |
Ka hangaia ēnei ngongo mā te whakamahi i tētahi tukanga tātai matao e whakarei ake ana i ō rātou āhuatanga miihini. Ehara i te mea ka whakapai ake noa te tukanga tātai matao i te tika o ngā āhua o ngā ngongo engari ka whakanui ake hoki i tō rātou kaha mā te whakapakeke i te taumahatanga. Ka tāpirihia e te whakaotinga whakakoi he paparanga o te tika e tika ana mō ngā tono waipēhi, ka tukuna he mata o roto maeneene e whakaiti ana i te waku me te whakapai ake i ngā tere rere.
ngā āhuatanga rauemi
Ko te rauemi st52 he maitai hanganga waro e whakamahia ana i roto i te hanga i ngā wāhanga miihini mahi-teitei. Kei roto i tōna hanganga koranu te manganese (mn) me te silicon (si), e whai wāhi ana ki te kaha me te pakari o te maitai me te pupuri tonu i te pai o te whakarewa. He maha ngā wā ka tīpakohia tēnei rauemi mō ngā tono e hiahia ana ki te kaha kume me te kaha tuku, he mea tino pai mō ngā pūnaha pēhanga-teitei.
ngā tono i roto i ngā taputapu tukatuka miihini
E whakamahia whānuitia ana ngā ngongo din2391 st52 puta noa i ngā ahumahi maha nā te mea he maha ngā whakamahinga me te pono. Kei raro nei ētahi tono noa:
1. **ngā rango waipēhi**: nā te hoahoa maeneene me te āhua whakakoi i pai ai ēnei ngongo mō te whakamahi i roto i ngā rango waipēhi, kia pai ai te mahi i raro i ngā pēhanga teitei.
2. **ngā pūnaha hau**: e whakamahia ana i roto i ngā mahi hau, he māmā engari he kaha ngā wāhanga o ēnei ngongo e mahi pai ana i raro i ngā kawenga huringa.
3. **ngā wāhanga motuka**: I roto i te umanga motuka, ka whakamahia ngā ngongo st52 mō te hanga i ngā wāhanga pēnei i ngā mimiti ru me ngā wāhanga anga nā te mea he pakari.
4. **mīhini hanga**: e whakamahia ana i roto i te hanga o ngā wāhanga mīhini pēnei i ngā pou me ngā toki e hiahiatia ana te tino tika.
5. **taputapu hanga**: e mahi ana hoki rātou i roto i te rāngai hanga mō ngā pūnaha waipēhi i roto i ngā keri, ngā kerēne, me ētahi atu mīhini taumaha.
#### whakatau
Ko te ngongo rino kore-whakakoi din2391 st52 he tohu mō te hiranga o te hangarau i roto i te hanga whakarewa mō te tukatuka miihini. Nā tōna kaha whakamiharo, tōna pakari, me tōna whānuitanga o ngā tono, he wāhanga nui tēnei i roto i ngā pūnaha ahumahi hou. Ka taea e ngā pakihi e hiahia ana ki te whakamahi i ngā otinga ngongo pono me te mahi teitei te whakawhirinaki ki te hiranga e whakaratohia ana e ngā ngongo st52 hei whakatutuki i ā rātou hiahia tukatuka miihini.
Tena koa whakapā mai ki a mātou mō ngā utu, te wātea, me ētahi atu kōwhiringa hei whakatutuki i ō hiahia tukatuka mīhini!