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- Politecnico di Milano
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- Mechanical Engineering
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- Applied Metallurgy
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07 Diagramma Fe C
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9 D. Mombelli 9 D. Mombelli Il diagramma Fe-C %Cmax = 6,67% Fe-C Metastabile Fe-C Stabile 3Fe+CÆFe3C Campi monofasici: ↘Soluzione solida G ↘Soluzione solida J ↘Soluzione solida D ↘Composto intermetallico Fe3C 10 D. Mombelli 10 D. Mombelli Il diagramma Fe-C Si esamina la verticale del ferro puro: → 3 Forme allotropiche: ↘1538-1394 °C Æ FeG(CCC) ↘1394-912 °C ÆFeJ(CFC) ↘912-20 °CÆFeD(CCC) Si esamina il diagramma Fe-C: → 3 Orizzontali 0-varianti ↘1495 °C Æ Peritettica ↘1148 °C Æ Eutettica ↘727 °C Æ Eutettoidica →0 – 2,11%C Æ Acciai →2,11 – 6,69%C Æ Ghise 11 D. Mombelli Quadro d’insieme 12 D. Mombelli 12 D. Mombelli Lega ausiliaria 0,02%C Liquido 2 G G 2’ G GG L 3 G GG 4 G GG J 5 J JJ J 7 J JJ J D 8 D DD D 6 J JJ J D 13 D. Mombelli Lega ausiliaria 0,02%C 9 D DD D Fe3C III IICe me nti te I0,18% 0,026,690,0080,02 0,0080,02 Q Ferrite99,82% 0,026,690,0080,02 0,026,69 Q III3CFe α o o 0,02LQ0,02 Q0,02 Q 0,02LQ0,02 0,02L Q III3CFe α 2 Fasi : FeD; Fe3C 2 Costituenti strutturali : Ferrite; Cementite III Temperatura : ambiente (fine solidificazione)
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