A. Estimate the eutectoid temperature and composition for a 4340 steel that contains 0.40% C, 0.8...
a. Estimate the eutectoid temperature and composition for a 4340 steel that contains 0.40% C, 0.80% Mn, 0.22% Si, 0.80% Cr, 1.8% Ni, and 0.20% Mo. b. If this steel were transformed at the eutectoid temperature, what fraction of the microstructure would be pearlite? b. If this steel were transformed at the eutectoid temperature, what fraction of the microstructure would be pearlite?
Homework Answers
Add Answer to:
A. Estimate the eutectoid temperature and composition for a 4340 steel that contains 0.40% C, 0.8...
A carbon steel plate containing 0.33 wt%C is heat treated to 1000°C so you will need to evaluate the following queries: A. With consideration of the equilibrated structures, estimate the phases f...
A carbon steel plate containing 0.33 wt%C is heat treated to 1000°C so you will need to evaluate the following queries: A. With consideration of the equilibrated structures, estimate the phases formed upon cooling to room temperature You determine later that the steel's composition is Fe-0.33C-0.53Mn-0.9Cr-0.18Mo (all in wt%), and luckily found the attached diagram. Give the processing of the steel needed to acquire a microstructure of austenite, 50% pearlite, 100% martensite, and 100% bainite Determine the mole fraction of...
In the diagram below, what is the eutectic temperature and what is the eutectoid temperature of...
In the diagram below, what is the eutectic temperature and what
is the eutectoid temperature of steel?
A.
eutectic
temperature: 1539°C,
eutectoid
temperature:
723°C.
B.
eutectic
temperature: 723°C,
eutectoid
temperature:
1539°C.
C.
eutectic
temperature: 723°C,
eutectoid
temperature:
1130°C.
D.
eutectic
temperature: 1130°C,
eutectoid
temperature:
723°C.
In the diagram below, what is the eutectic composition and what
is the eutectoid composition of steel?
A.
eutectic
composition:
4.3
wt% C, eutectoid
composition:
0.83 wt% C.
B.
eutectic
composition:
0.83
wt% C, eutectoid...
Ou. 3 Chapters 10- 11: Phase Transformations/ Designations, Compositions and Typ Applications for Some Selected Steels (25%) Using the isothermal transformation diagram for an iron-carbon alloy o...
Ou. 3 Chapters 10- 11: Phase Transformations/ Designations, Compositions and Typ Applications for Some Selected Steels (25%) Using the isothermal transformation diagram for an iron-carbon alloy of eutectoid composition 6), please, identify and name the final microstructures resulting from the two cooling curves labeled (@) and (b). (c): Draw and label on Figure 6 the cooling curve that yields the following microstructures: 50% of microstructure A (Figure 7a) and 50% of microstructure B (Figure 7b). (d) Please, provide missing information...
LOO Etter 700 A certain steel of eutectoid composition transforms according to the isothermal transformation curve...
LOO Etter 700 A certain steel of eutectoid composition transforms according to the isothermal transformation curve shown below. a. Describe a thermal treatment that would result in a structure having 50% pearlite and 25% bainite, and 25% martensite. 1200 1000 Tenger! 500 TO 300 200 00 MASON MO 100 b. Assuming I hold for 105 seconds, what approximate temperature do I need to quench to and hold to get 100% i. Coarse pearlite 200 10 ii. Martensite iii. Bainite
please answer question 2,3,4 A critical feature of steel is that a considerable amount of...
please answer question 2,3,4
A critical feature of steel is that a considerable amount of carbon can be dissolved in the austenite, phase, (up to 2.14 w/o at 1147"C), whereas carbon is essentially insoluble in ferrite, Cooling from point d to e, just above the eutectoid but still in the an increased fraction of the +y region, will produce phase and a microstructure similar to that shown: the particles precinitates out in the form af an intermetallic.compound called iron-carbide...
Using the isothermal transformation diagram for an alloy steel (type 4340) specify the nature of the final microstruct...
Using the isothermal transformation diagram for an alloy steel (type 4340) specify the nature of the final microstructure (in terms of micro-constituents present and approximate percentages) 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 austenite structure. (a) (a) Rapidly cool to 400°C, hold for 10 seconds, and...
A steel alloy contains 94.4 wt% Fe, 5.0 wt% Mo, and 0.6 wt% C. Using Animated...
A steel alloy contains 94.4 wt% Fe, 5.0 wt% Mo, and 0.6 wt% C. Using Animated Figure 9.34 and Animated Figure 9.35 determine the following: (a) The eutectoid temperature of this alloy. C [The absolute tolerance is +/- 20.] (b) The eutectoid composition. wt%C [The absolute tolerance is +/- 0.02.]
A steel plate contains 0.82% C and the surface is going to be carburized. The carburization...
A steel plate contains 0.82% C and the surface is going to be
carburized. The carburization takes place such that the surface
composition is 3.0% C, how long will it take to have 2.4% C at a
depth of 0.55 mm into the plate at a temperature of 560
°C?
erf(2) 7 erf(x) Z erf(2) 0 0 0.55 0.5633 1.3 0.9340 0.025 0.0282 0.60 0.6039 1.4 0.9523 0.05 0.0564 0.65 0.6420 1.5 0.9661 0.10 0.1125 0.70 0.6778 1.6 0.9763 0.15...
7. A hypereutectoid steel contains 0.8% C. When slow cooled from austenite the following transformation products...
7. A hypereutectoid steel contains 0.8% C. When slow cooled from austenite the following transformation products result. a) ferrite and bainite b) ferrite and martensite c) ferrite and pearlite d) pearlite and cementite 8. Pearlite is a combination of a) cementite and iron carbide b) ferrite and cementite c) ferrite and bainite d) ferrite and martensite 9. The process of hardening steel consists of what two steps? a) melting the steel followed by quenching b) melting the steel followed by...
Im supposed to use this table to find it - A steel plate contains 0.62% C...
Im supposed to use this table to find it
- A steel plate contains 0.62% C and the surface is to be carburized to make it more wear resistant. If the carburization takes place such that the surface composition is 2.2% C, how long will it take to have 1.4% C at a depth of 0.75 mm into the plate at a temperature of 450 °C? (Use the data found in tables of Ch. 5 to solve the problem. Diffusing...
A carbon steel plate containing 0.33 wt%C is heat treated to 1000°C so you will need to evaluate the following queries: A. With consideration of the equilibrated structures, estimate the phases formed upon cooling to room temperature You determine later that the steel's composition is Fe-0.33C-0.53Mn-0.9Cr-0.18Mo (all in wt%), and luckily found the attached diagram. Give the processing of the steel needed to acquire a microstructure of austenite, 50% pearlite, 100% martensite, and 100% bainite Determine the mole fraction of...
In the diagram below, what is the eutectic temperature and what
is the eutectoid temperature of steel?
A.
eutectic
temperature: 1539°C,
eutectoid
temperature:
723°C.
B.
eutectic
temperature: 723°C,
eutectoid
temperature:
1539°C.
C.
eutectic
temperature: 723°C,
eutectoid
temperature:
1130°C.
D.
eutectic
temperature: 1130°C,
eutectoid
temperature:
723°C.
In the diagram below, what is the eutectic composition and what
is the eutectoid composition of steel?
A.
eutectic
composition:
4.3
wt% C, eutectoid
composition:
0.83 wt% C.
B.
eutectic
composition:
0.83
wt% C, eutectoid...
Ou. 3 Chapters 10- 11: Phase Transformations/ Designations, Compositions and Typ Applications for Some Selected Steels (25%) Using the isothermal transformation diagram for an iron-carbon alloy of eutectoid composition 6), please, identify and name the final microstructures resulting from the two cooling curves labeled (@) and (b). (c): Draw and label on Figure 6 the cooling curve that yields the following microstructures: 50% of microstructure A (Figure 7a) and 50% of microstructure B (Figure 7b). (d) Please, provide missing information...
LOO Etter 700 A certain steel of eutectoid composition transforms according to the isothermal transformation curve shown below. a. Describe a thermal treatment that would result in a structure having 50% pearlite and 25% bainite, and 25% martensite. 1200 1000 Tenger! 500 TO 300 200 00 MASON MO 100 b. Assuming I hold for 105 seconds, what approximate temperature do I need to quench to and hold to get 100% i. Coarse pearlite 200 10 ii. Martensite iii. Bainite
please answer question 2,3,4
A critical feature of steel is that a considerable amount of carbon can be dissolved in the austenite, phase, (up to 2.14 w/o at 1147"C), whereas carbon is essentially insoluble in ferrite, Cooling from point d to e, just above the eutectoid but still in the an increased fraction of the +y region, will produce phase and a microstructure similar to that shown: the particles precinitates out in the form af an intermetallic.compound called iron-carbide...
Using the isothermal transformation diagram for an alloy steel (type 4340) specify the nature of the final microstructure (in terms of micro-constituents present and approximate percentages) 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 austenite structure. (a) (a) Rapidly cool to 400°C, hold for 10 seconds, and...
A steel alloy contains 94.4 wt% Fe, 5.0 wt% Mo, and 0.6 wt% C. Using Animated Figure 9.34 and Animated Figure 9.35 determine the following: (a) The eutectoid temperature of this alloy. C [The absolute tolerance is +/- 20.] (b) The eutectoid composition. wt%C [The absolute tolerance is +/- 0.02.]
A steel plate contains 0.82% C and the surface is going to be
carburized. The carburization takes place such that the surface
composition is 3.0% C, how long will it take to have 2.4% C at a
depth of 0.55 mm into the plate at a temperature of 560
°C?
erf(2) 7 erf(x) Z erf(2) 0 0 0.55 0.5633 1.3 0.9340 0.025 0.0282 0.60 0.6039 1.4 0.9523 0.05 0.0564 0.65 0.6420 1.5 0.9661 0.10 0.1125 0.70 0.6778 1.6 0.9763 0.15...
7. A hypereutectoid steel contains 0.8% C. When slow cooled from austenite the following transformation products result. a) ferrite and bainite b) ferrite and martensite c) ferrite and pearlite d) pearlite and cementite 8. Pearlite is a combination of a) cementite and iron carbide b) ferrite and cementite c) ferrite and bainite d) ferrite and martensite 9. The process of hardening steel consists of what two steps? a) melting the steel followed by quenching b) melting the steel followed by...
Im supposed to use this table to find it
- A steel plate contains 0.62% C and the surface is to be carburized to make it more wear resistant. If the carburization takes place such that the surface composition is 2.2% C, how long will it take to have 1.4% C at a depth of 0.75 mm into the plate at a temperature of 450 °C? (Use the data found in tables of Ch. 5 to solve the problem. Diffusing...
Most questions answered within 3 hours.
-
1. Develop a use case diagram for the bank case study described
in Chapter 1. 2....
asked 8 minutes ago -
The phylum Protista has often been referred to as a junk drawer
of classification. Explain what...
asked 15 minutes ago -
The average amount of money spent for lunch per person in the
college cafeteria is $7.09...
asked 17 minutes ago -
You follow the lab procedure and at the end of Part 4C, you used
an average...
asked 36 minutes ago -
Write 250-450 words, about the following: • Analyze how a
servant leader in your organization or...
asked 40 minutes ago -
3. American and Japanese workers can each produce 4 cars a
year. An American worker can...
asked 43 minutes ago -
On October 1, 20X1, a company purchased a piece of land by
agreeing to pay the...
asked 55 minutes ago -
Jamie is doing a survey at her school about whether the students
feel the cafeteria food...
asked 1 hour ago -
What are the roles of 3' and 5' untranslated regions in
mRNAs?
asked 1 hour ago -
A domestic television receives antenna delivers a sky noise
power of -105 dBm to a matched...
asked 1 hour ago -
What do you think are the chemical reactions involved in the
breathalyzer tests administered to potentially...
asked 1 hour ago -
A random sample of 120 observations produces a mean of
38.2 from a population with a...
asked 1 hour ago