Ko te rereketanga matua i waengakowiri tira austeniticme te kowiri tira ferritic kei roto i o raatau hanganga me o raatau taonga.
Ko te kowiri tira Austenitic he whakahaere e mau tonu ana i nga pāmahana teitei ake i te 727°C.E whakaatu ana i te kirihou pai, a, ko te hanganga pai rawa atu mo te nuinga o nga tira e mahi ana i te tukatuka pehanga i te pāmahana teitei.I tua atu, ko te maitai austenitic he kore-aukume.
Ko te Ferrite he otinga totoka o te waro kua memeha ki roto i te rino-a, he tohu ko F. Inkowiri tira, "ferrite" e pā ana ki te otinga totoka o te waro i roto i te α-rino, e tohuhia ana e te iti o te wairewa waro.I te paemahana o te rūma, ka taea anake te rewa ki te 0.0008% waro, ka eke ki te 0.02% te whakarewatanga waro ki te 727°C, i te wa e mau tonu ana te kurupae-a-tinana.Ka tohuhia e te tohu F.
I tetahi atu ringa, ferritickowiri tirae tohu ana ki te kowiri tira te nuinga o te hanganga ferritic i te wa e whakamahia ana.Kei roto ko te chromium i roto i te awhe o te 11% ki te 30%, e whakaatu ana i te hanganga kiripiri-a-tinana.Ko te ihirangi rino o te kowiri tira he kore hono ki te mea kua whakarōpūtia hei kowiri tira ferritic.
Na te iti o te waro, ka whakaatu te kowiri tira ferritic i nga taonga e rite ana ki te rino parakore, tae atu ki te kirihou tino pai me te pakari me te reiti whakaroa (δ) o 45% ki te 50%.Heoi, he iti noa iho tona kaha me tona pakeke, me te kaha toka (σb) tata ki te 250 MPa me te pakeke Brinell (HBS) 80.
Wā tuku: Tihema-25-2023