Fe-Fe3C phase diagram T L D L+A 1148℃ L+Fe3CI E A F G (A+Fe3C) A+ Ld Ld+Fe3CI A+F S Fe3Cn A+Ld+Fe3CI 727℃ (F+Fe3C) K P P+Ld'+FesCu Ld'Ld'+FesCI P+F (P+Fe3C) 0.0218%C0.77%C 2.11%C 4.3%C 6.69%C Fe Fe3C
Fe - Fe3C phase diagram A C D E F G S P Q 1148℃ 727℃ L A L+A 0.0218%C 2.11%C 4.3%C 6.69%C Fe Fe3C T° Ld Ld+Fe3CⅠ A+Ld+Fe3CⅡ F A+F P 0.77%C Ld’ K ( P+Fe3C ) P+Ld’+Fe3CⅡ Ld’+Fe3CⅠ P+F P+Fe3CⅡ ( F+ Fe3C ) A+ Fe3CⅡ L+ Fe3CⅠ ( A+Fe3C )
1.Meaning of main points symbol T/℃ wc% meaning A 1538 0 Tm of pure iron C 1148 4.30 Eutectic point D 1227 6.69 T of cementite E 1148 2.11 Max.solubility of C in y-Fe G 912 0 a-FeY-Fe transformation point P 727 0.0218 Max.solubility of C in a-Fe 727 0.77 Eutectoidic point Q room T 0.0008 solubility of C in a-Fe
1. Meaning of main points symbol T/ ℃ wc% meaning A C D E G P S Q 1538 1148 1227 1148 912 727 727 room T 0 4.30 6.69 2.11 0 0.0218 0.77 0.0008 Tm of pure iron Eutectic point Tm of cementite Max.solubility of C in γ-Fe α-Fe γ-Fe transformation point Max.solubility of C in α-Fe Eutectoidic point solubility of C in α-Fe