1000 grams of steel containing 1.5 weight percent carbon is heated to complete melting. After equilibrium is achieved, we slowly cool the alloy. At 720C we keep the alloy to maintain equilibrium. Determine the amounts of the following, in grams. Pearlite Proeutectoid phase Total cementite

Elements Of Electromagnetics
7th Edition
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Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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1000 grams of steel containing 1.5 weight percent carbon is heated to complete melting.  After equilibrium is achieved, we slowly cool the alloy.

At 720C we keep the alloy to maintain equilibrium.  Determine the amounts of the following, in grams.

  1. Pearlite
  2. Proeutectoid phase
  3. Total cementite
Temperature (°C)
1600
1400
1200
1000
800
600
400
(Fe)
5
-1493 °C
1538 °C
1394 °C
a+y
y, Austenite
912 °C
0.76
0.022
, Feritte
1085 °C
1
y + L
2
Composition (at% C)
10
15
2.14
1147 °C
a + Fe₂ C
3
Composition (wt%
L
Composition = 0 wt% C
Composition = 0 at% C
Temperature = 400 °C
Temperature = 752 °F
4.30
y + Fe3C
727 °C
20
Cementite (Fe,C)
5
6
25
2500
2000
1500
1000
6.70
Temperature (°F)
Transcribed Image Text:Temperature (°C) 1600 1400 1200 1000 800 600 400 (Fe) 5 -1493 °C 1538 °C 1394 °C a+y y, Austenite 912 °C 0.76 0.022 , Feritte 1085 °C 1 y + L 2 Composition (at% C) 10 15 2.14 1147 °C a + Fe₂ C 3 Composition (wt% L Composition = 0 wt% C Composition = 0 at% C Temperature = 400 °C Temperature = 752 °F 4.30 y + Fe3C 727 °C 20 Cementite (Fe,C) 5 6 25 2500 2000 1500 1000 6.70 Temperature (°F)
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