- Composition 10 15 20 25 16000 538 C 1493 1400 2500 1394 C 1200 1147 C Y Austenite 2 14 4 30 2000 Temperature C 1000 1 (111.81 KiB) Viewed 13 times
Composition 10 15 20 25 16000 538°C -1493 1400 2500 1394°C 1200 1147°C y Austenite 2.14 4.30 2000 Temperature (°C) 1000 912°C Temperature (°F) y Feyc 800 + 1500 727°C 0.76 0.022 600 Feride + Fec Cementite (Feyc) 1000 6.70 400 0 6 (Fel Composition ( WC) Figure 9.24 The iron-iron carbide phase diagram. Adapted from Binary Alloy Phase Diagrams, Vol. 1, 2nd edition, T. B. Massalski (Editor-in-Chief), 1990. Reprinted by permission of ASM International Materials Park, OH.]
Use the iron-iron carbide phase diagram shown in Fig. 9.24, page 287, Callister's book, 10th edition to perform several tasks The carbon content (Co) in a carbon-steel specimen having fm(Fe3C) = * 5 puntos 0.131 cementite (Fe3C) at just below the eutectoid temperature, say, at I = 726°C < 727°C, is Co = 0.90%C Co = 0.80%C Co = 0.69%C None of the options The carbon steel designation is * 5 puntos AISI 1080 AISI 1060 о AISI 1090 O None of the options The weight percent (%) of carbon in ferrite (a-phase) at T = 726°C is * 5 puntos Ca -0.022%C Ca 0.032%C Ca -0.012%C None of the options The weight percent (%) of carbon in ferrite (Fe3C-phase) at T = 726°C is * 5 puntos C(Fe3C) = 6.70%C C(Fe3C) = 4.56%C Ο Ο Ο Ο C(Fe3C) - 5.70%C None of the options The total mass fraction of ferrite in the steel at T = 726°C is * 5 puntos fm.a = 1.24 fm.a = 0.87 fm.a = 0.98 O None of the options