I RMC Foundry, te nuinga o ngawhakarewa kowiri tiraka puta mai i te ware pi kua ngarotukanga makanga haumina te tino tika. Ko te kowiri tira (SS mo te poto) ko te whakapotonga o te rino kowiri me te rino-waikawa. E kiia ana ko te kowiri tira he atete ki te ngoikore o nga purongo kino penei i te hau, te mamaoa, me te wai. Ko te rino waikura ka kiia ko te maitai waikawa-atete. Ka taea e tatou te ringihia he maha nga waahanga iti he kowiri tira penei i te Ferritic Stainless Steel, Martensitic Stainless Steel, Austenitic Stainless Steel, Precipitation Hardening Stainless Steel me teMatarua Kowiri tira(DSS). Austenitic kowiri tira, e pā ana ki te roopu o te kowiri tira me te hanganga austenitic i te pāmahana rūma, ko te momo kowiri te nuinga whakamahia mo te whakarewanga haumi. Ko te kowiri tira Austenitic tetahi o nga karaehe e rima o te kowiri tira ma te hanga tioata (me te ferritic, martensitic, duplex me te ua whakapakeke). I etahi waahi, ko te austentite kowiri tira ka kiia ko te 300 raupapa kowiri tira. Ina kei roto i te maitai te 18% Cr, 8% -25% Ni, me te 0.1% C, he hanganga austenite pumau. Austenitic chromium-nickel kowiri tira kei roto i te maitai 18Cr-8Ni rongonui me te maitai raupapa Cr-Ni teitei i whakawhanakehia ma te whakauru i te ihirangi Cr me Ni me te taapiri Mo, Cu, Si, Nb, Ti me etahi atu waahanga i runga i tenei kaupapa. Ko te kowiri tira Austenitic he kore-aukume, he nui te uaua me te kirihou, engari he iti tona kaha, a kaore e taea te whakapakari i roto i te huringa wahanga. Ka taea anake te whakapakari ma te mahi makariri. Mena ka taapirihia nga huānga penei i te S, Ca, Se, Te, he pai nga ahuatanga o te miihini.
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