Mai i te hanganga ki te āhua, he maha ngā āhuatanga ka pā ki ngā āhuatanga o ngā hua kowiri tira. Ko tētahi o ngā mea nui hei whakaaroaro ko te momo maitai hei whakamahi. Mā tēnei ka whakatau i ngā āhuatanga maha, ā, i te mutunga, ko te utu me te roa o te ora o ō hua kowiri tira.
Nā, me pēhea koe e mōhio ai ki hea koe ka tīmata ai?
Ahakoa he ahurei ia tono, e whakaatu ana ēnei pātai e whitu i ngā whakaaro nui hei āwhina i a koe ki te whakawhāiti i ō kōwhiringa me te kimi i ngā māka e tino tika ana mō ō hiahia, mō tō tono rānei.
1. HE AHA TE MOMO ĀRAITANGA E HIAHIATIA ANA E TAKU RINO?
Ina whakaaro koe ki te maitai kore waikura, ko ngā mea tuatahi ka puta ake ki te hinengaro ko te ātete ki ngā waikawa me ngā pūhaumāota -- pērā i ngā mea e kitea ana i roto i ngā mahi ahumahi, i ngā taiao moana rānei. Heoi anō, he mea nui anō hoki te ātete ki te pāmahana.
Mena e hiahia ana koe ki te ātete ki te waikura, me karo koe i ngā maitai ferritic me martensitic. Ko ngā momo maitai kore waikura pai mō ngā taiao waikura ko ngā koranu austenitic, duplex rānei pērā i ngā momo 304, 304L, 316, 316L, 2205, me te 904L.
Mō ngā taiao pāmahana teitei, ko ngā karaehe austenitic te mea pai rawa atu. Mā te kimi i tētahi karaehe he nui te chromium, te silicon, te hauota, me ngā huānga whenua onge ka rerekē ake te kaha o te maitai ki te tu atu i ngā pāmahana teitei. Ko ngā karaehe noa mō ngā taiao pāmahana teitei ko te 310, te S30815, me te 446.
He pai hoki ngā momo maitai austenitic mō ngā taiao pāmahana iti, ngā taiao cryogenic rānei. Mō te ātete tāpiri, tirohia ngā momo waro iti, ngā momo hauota nui rānei. Ko ngā momo noa mō ngā taiao pāmahana iti ko te 304, 304LN, 310, 316, me te 904L.
2. ME WHAKAKĀHORE TE HANGA O TAKU RINO?
Ka pakarukaru te maitai kāore i te tino ngāwari te hanga mēnā ka nui rawa te mahi, ā, ka iti ake te mahi. I te nuinga o te wā, kāore i te tūtohutia ngā maitai martensitic. Hei tāpiri, ko te maitai kāore i te tino ngāwari te hanga, tērā pea kāore e mau tōna āhua ina hiahiatia he hanganga uaua, he uaua rānei.
I te wā e whiriwhiri ana koe i tētahi momo maitai, me whakaaro koe ki te āhua e hiahia ana koe kia tukuna. Ahakoa he tokotoko, he pereti, he pae, he rau rānei e hiahia ana koe, ka whakawhāitihia ō whiringa. Hei tauira, he maha ngā wā ka hokona ngā maitai ferritic i roto i ngā rau, he maha ngā wā ka hokona ngā maitai martensitic i roto i ngā pae, i ngā pereti rānei, ā, he maha ngā āhua e wātea ana ngā maitai austentic. Ko ētahi atu momo maitai e wātea ana i roto i ngā momo āhua ko te 304, 316, 430, 2205, me te 3CR12.
3. ME WHAKAMIHINI TAKU RINO?
Ehara i te mea he raruraru te mahi mīhini. Heoi, ka puta pea ngā hua kāore i te whakaarohia i te wā e whakapakeketia ana. Mā te tāpiri i te whanariki ka pai ake te mahi mīhini engari ka whakaitihia te kaha hanga, te kaha whakarewa me te ātete ki te waikura.
Nā tēnei, he mea nui te kimi i te taurite i waenga i te kaha ki te miihini me te ātete ki te waikura mō te nuinga o ngā tukanga hanga maitai kore waikura maha-wāhanga. I runga anō i ō hiahia, ka tukuna e ngā reanga 303, 416, 430, me te 3CR12 he taurite pai hei whakawhāiti ake i ngā kōwhiringa.
4. ME WHAKAWERA E AU TAKU RINO KOREWAI?
Ka raru pea te whakarewa i te maitai kore waikura—tae atu ki te pakaru wera, te pakaru waikura ahotea, me te waikura intergranular—i runga i te momo maitai e whakamahia ana. Mena kei te whakaaro koe ki te whakarewa i tō maitai kore waikura, he pai rawa atu ngā koranu austenitic.
Ka taea e ngā taumata waro iti te āwhina i te kaha whakarewa, ā, ka taea e ngā tāpiringa, pērā i te niobium, te whakau i ngā koranu hei karo i ngā āwangawanga waikura. Ko ngā taumata rongonui o te maitai kore waikura mō te whakarewa ko te 304L, 316, 347, 430, 439 me te 3CR12.
5. E HIAHIATIA ANA NGĀ MAIMOATANGA WERA?
Mena me whai maimoatanga wera tō tono, me whakaaro koe ki te urupare a ngā momo maitai rerekē. He tino rerekē ngā āhuatanga whakamutunga o ētahi maitai i mua me muri i te maimoatanga wera.
I te nuinga o te wā, ko ngā maitai whakapakeke martensitic me te precipitation, pērā i te 440C, te 17-4 PH rānei, ka tukuna te mahi pai rawa atu ina whakamahanatia. He maha ngā maitai kore waikura austenitic me te ferritic kāore e taea te whakapakeke ina whakamahanatia, nō reira ehara i te kōwhiringa pai.
6. HE AHA TE KAHA O TE RINO E TIKA ANA MŌ TAKU WHAKAMAHINGA?
He mea nui te kaha o te maitai hei whakaaro māu kia pai ai te haumaru. Heoi anō, mā te whakakī nui rawa ka hua ake he utu koretake, he taumaha, me ētahi atu āhuatanga maumau. Ko ngā āhuatanga kaha ka whakatauhia noatia e te whānau maitai, me ētahi atu rerekētanga e wātea ana i roto i ngā momo taumata rerekē.
7. HE AHA TE UTU MUTUNGA ME TE UTU MŌ TE ORA O TĒNEI RINO I TAKU WHAKAARO?
Ko ngā whakaaro katoa o mua ka tautoko i te pātai nui rawa atu i te wā e whiriwhiri ana i tētahi momo maitai kore waikura—te utu mō te wā katoa. Mā te whakataurite i ngā momo maitai kore waikura ki tō taiao, te whakamahinga me ngā whakaritenga e hiahiatia ana, ka taea e koe te whakarite kia roa te mahi me te uara tino pai.
Kia āta tātarihia te mahi a te maitai i te wā e whakamahia ana, me ngā utu pea e pā ana ki te tiaki, ki te whakakapi rānei i mua i te whakatau. Mā te whakawhāiti i ngā utu i te tīmatanga ka nui ake pea te whakapaunga mō te roanga o tō kaupapa, hua, hanganga, me ētahi atu tono rānei.
I te mea he nui ngā momo me ngā āhua o te maitai kore waikura e wātea ana, he huarahi pai te whai i tētahi tohunga hei āwhina i a koe ki te whakamārama i ngā kōwhiringa me ngā hapa pea hei whakarite kia whiwhi koe i te uara tino pai mō te haumi ki te maitai kore waikura. Hei kaiwhakarato matua mō te maitai kore waikura mō ngā tau neke atu i te 20, ka whakamahia e te Jindalai Steel Group ō mātou wheako hei ārahi i a koe i roto i te tukanga hoko. Tirohia tā mātou rārangi whānui o ngā hua maitai kore waikura ipurangi, waea mai rānei ki te matapaki i ō hiahia me tētahi mema o tā mātou tīma.
Wā tuku: Hakihea-19-2022
