Given a plain carbon steel which has 8 % primary (or pro eutectoid) carbide, determine both overall carbon content and ferrite content. Assume that the steel was at equilibrium just above the eutectoid temperature and then cooled immediately to 600ºC and held for 5 seconds, then quenched. What microconstituents would there be in the structure and how much of each? (Assume the cooling behavior follows the TTT curve shown)
Homework Answers
during rapid cooling to 600°c
50 % will be turned into pearlite
amd during quenching remaining 50 % will be turned intlo martensite
so final composition is 50% pearlite and 50% martensite
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Given a plain carbon steel which has 8 % primary (or pro
eutectoid) carbide, determine both...
Given a plain carbon steel which has 8 % primary (or pro eutectoid) carbide, determine both...
Given a plain carbon steel which has 8 % primary (or pro eutectoid) carbide, determine both overall carbon content and ferrite content. Assume that the steel was at equilibrium just above the eutectoid temperature and then cooled immediately to 600ºC and held for 5 seconds, then quenched. What microconstituents would there be in the structure and how much of each? (Assume the cooling behavior follows the TTT curve shown)
this is the TTT curve Given a plain carbon steel which has 8 % primary (or...
this is the TTT curve
Given a plain carbon steel which has 8 % primary (or pro eutectoid) carbide, determine both overall carbon content and ferrite content. a. Assume that the steel was at equilibrium just above the eutectoid temperature and then cooled immediately to 600°C and held for 5 seconds, then quenched. What microconstituents would there be in the structure and how much of each? (Assume the cooling behavior follows the TTT curve shown) 800 А Eutectoid temperature 1400...
Austenite Pearlite Question 3 (24 pts): We are interested in performing different heat treatments to an...
Austenite Pearlite Question 3 (24 pts): We are interested in performing different heat treatments to an iron-carbon alloy of eutectoid compostion. Use the provided Temperature-Time Transformation (TTT) and Continuous Cooling Transformation (CCT) diagrams to specify the nature of the final microstructure in terms of microconstituents present and approximate percentages) of a small specimen that has been subjected to the following heat treatments. In each case, assume that the specimen begins at 760°C and that it has been at this temperature...
1. Using the isothermal transformation diagram for an iron-carbon alloy of eutectoid composition, specify the nature...
1. Using the isothermal transformation diagram for an iron-carbon alloy of eutectoid composition, specify the nature of the final microstructure (in terms of microconstituents present and approximate percentages of each) of a small specimen that has been subjected to the following time-temperature treatments. In each case assume that the specimen begins at 760°C and that it has been held at this temperature long enough to have achieved a complete and homogeneous austenitic structure (a) Rapidly cool to 400°C, hold for...
State the composition Fe and C of plain carbon eutectoid steel. Determine wt% for: α ferrite,...
State the composition Fe and C of plain carbon eutectoid steel. Determine wt% for: α ferrite, Fe3C cementite, assume equilibrium cooling process.
Question 3 (1) Sketch the microstructures (at temperature just below eutectold temperature) of slow-cooled pure Iron...
Question 3 (1) Sketch the microstructures (at temperature just below eutectold temperature) of slow-cooled pure Iron (Owt%C) and steels with 0.3wt%C, and 0.76wt%C, and explain how the structures develop on cooling from 1100°C to room temperature (Figure 3.1 for Fe-Fe,c phase diagram, see below). (18marks] 1600 Composition Cat C) 10 is 20 25 1538"C 149346 1400 1394°C 2500 72 1200 1147°C > Austenite 2.14 4.30 Temperature) 2000 1000 Temperature (°F) 912°C y + Fe3c 800 1500 0.76 727°C 600 0.022...
Make a copy of the isothermal transformation diagram for an iron–carbon alloy of eutectoid composition provided...
Make a copy of the isothermal transformation diagram for an
iron–carbon alloy of eutectoid composition provided overleaf and
then sketch and label time–temperature paths on this diagram to
produce the following microstructures:
a) 25% martensite and 75% austenite
b) 100% fine pearlite
c) 25% pearlite, 25% bainite, 45% martensite, and 5%
austenite.
d) 100% tempered martensite.
800 A 1400 Eutectoid temperature 700 A 1200 A P 600 1000 500 800 AXTIS 400 A 600 300 M(start 50% 200 400 M+A...
please explain with the figure 2 A plain plain carbon steel of unknown composition is cooled...
please explain with the figure
2 A plain plain carbon steel of unknown composition is cooled in the furnace from w oning temperature. At room temperature, the percentage of primary (proeutectoid) ferrite() monin this steel is found to be 27%. Use Figure 1 and answer the following questions. What is the concentration of carbon present in this steel? b) Which other phase or phases will you find in the structure of this steel? c) Calculate the amount of the phase...
Using the attached TTT diagram for 1.13 wt% C steel, name the structures present and approximate...
Using the attached TTT diagram for 1.13 wt% C steel, name the structures present and approximate quantities after the following heat treatments: a) heat to 900°C, quench to 700°C, hold for 10 s, quench to 0°C (the iron-iron carbide phase diagram will help) b) heat to 900°C, quench to 300°C, hold for 1000 s, quench to 0°C c) heat to 900°C, quench to 100°C d) heat to 800°C, quench to 0°C (the iron-iron carbide phase diagram will help) 900 1600...
(1s) The TTT d austenitized. Determine the final amount (approximate percentages) of each microstructure, and show basic path (draw on charts). 6. agram for an iron-carbon alloy w, h 0.76%C steel is...
(1s) The TTT d austenitized. Determine the final amount (approximate percentages) of each microstructure, and show basic path (draw on charts). 6. agram for an iron-carbon alloy w, h 0.76%C steel is given. Assume that the specimen gans above 800°C for each case and that it has been held at this temperature long enough to be fully microstructure (such as bauxite, magnetite, bainite, pearlite, um, martensite, spheroidite, cementite). Must specify microstructure name (not a letter). 800 a) Sample 1- Decrease...
this is the TTT curve
Given a plain carbon steel which has 8 % primary (or pro eutectoid) carbide, determine both overall carbon content and ferrite content. a. Assume that the steel was at equilibrium just above the eutectoid temperature and then cooled immediately to 600°C and held for 5 seconds, then quenched. What microconstituents would there be in the structure and how much of each? (Assume the cooling behavior follows the TTT curve shown) 800 А Eutectoid temperature 1400...
Austenite Pearlite Question 3 (24 pts): We are interested in performing different heat treatments to an iron-carbon alloy of eutectoid compostion. Use the provided Temperature-Time Transformation (TTT) and Continuous Cooling Transformation (CCT) diagrams to specify the nature of the final microstructure in terms of microconstituents present and approximate percentages) of a small specimen that has been subjected to the following heat treatments. In each case, assume that the specimen begins at 760°C and that it has been at this temperature...
1. Using the isothermal transformation diagram for an iron-carbon alloy of eutectoid composition, specify the nature of the final microstructure (in terms of microconstituents present and approximate percentages of each) of a small specimen that has been subjected to the following time-temperature treatments. In each case assume that the specimen begins at 760°C and that it has been held at this temperature long enough to have achieved a complete and homogeneous austenitic structure (a) Rapidly cool to 400°C, hold for...
Question 3 (1) Sketch the microstructures (at temperature just below eutectold temperature) of slow-cooled pure Iron (Owt%C) and steels with 0.3wt%C, and 0.76wt%C, and explain how the structures develop on cooling from 1100°C to room temperature (Figure 3.1 for Fe-Fe,c phase diagram, see below). (18marks] 1600 Composition Cat C) 10 is 20 25 1538"C 149346 1400 1394°C 2500 72 1200 1147°C > Austenite 2.14 4.30 Temperature) 2000 1000 Temperature (°F) 912°C y + Fe3c 800 1500 0.76 727°C 600 0.022...
Make a copy of the isothermal transformation diagram for an
iron–carbon alloy of eutectoid composition provided overleaf and
then sketch and label time–temperature paths on this diagram to
produce the following microstructures:
a) 25% martensite and 75% austenite
b) 100% fine pearlite
c) 25% pearlite, 25% bainite, 45% martensite, and 5%
austenite.
d) 100% tempered martensite.
800 A 1400 Eutectoid temperature 700 A 1200 A P 600 1000 500 800 AXTIS 400 A 600 300 M(start 50% 200 400 M+A...
please explain with the figure
2 A plain plain carbon steel of unknown composition is cooled in the furnace from w oning temperature. At room temperature, the percentage of primary (proeutectoid) ferrite() monin this steel is found to be 27%. Use Figure 1 and answer the following questions. What is the concentration of carbon present in this steel? b) Which other phase or phases will you find in the structure of this steel? c) Calculate the amount of the phase...
Using the attached TTT diagram for 1.13 wt% C steel, name the structures present and approximate quantities after the following heat treatments: a) heat to 900°C, quench to 700°C, hold for 10 s, quench to 0°C (the iron-iron carbide phase diagram will help) b) heat to 900°C, quench to 300°C, hold for 1000 s, quench to 0°C c) heat to 900°C, quench to 100°C d) heat to 800°C, quench to 0°C (the iron-iron carbide phase diagram will help) 900 1600...
(1s) The TTT d austenitized. Determine the final amount (approximate percentages) of each microstructure, and show basic path (draw on charts). 6. agram for an iron-carbon alloy w, h 0.76%C steel is given. Assume that the specimen gans above 800°C for each case and that it has been held at this temperature long enough to be fully microstructure (such as bauxite, magnetite, bainite, pearlite, um, martensite, spheroidite, cementite). Must specify microstructure name (not a letter). 800 a) Sample 1- Decrease...
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