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From the lists given below, choose the most appropriate set of heat treatment process and the corresponding process characteristies
Process
P. Tempering
Q. Austempering
R. Martempering
Characteristics
1. Austenite is converted into bainite
2. Austenite is converted into martensite
3. Cementite is converted into globular structure
4. Both hardness and brittleness are reduced
5. Carbon is absorbed into the metal
P. Tempering
Q. Austempering
R. Martempering
Characteristics
1. Austenite is converted into bainite
2. Austenite is converted into martensite
3. Cementite is converted into globular structure
4. Both hardness and brittleness are reduced
5. Carbon is absorbed into the metal
[ME 2004]
- a)P-3, Q-1, R-5
- b)P-4, Q-3, R-2
- c)P-4, Q-1, R-2
- d)P-1, Q-5, R-4
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
From the lists given below, choose the most appropriate set of heat tr...
In Tempering, both hardness and brittleness are reduced.
In Austempering, Austenite is converted into bainite.
In Martempering, Austenite gets converted into Martensite.
In Austempering, Austenite is converted into bainite.
In Martempering, Austenite gets converted into Martensite.
Most Upvoted Answer
From the lists given below, choose the most appropriate set of heat tr...
Explanation:
The most appropriate set of heat treatment process and the corresponding process characteristics are as follows:
P. Tempering:
- Process characteristic: Both hardness and brittleness are reduced.
- In the tempering process, the hardened steel is heated to a temperature below the lower critical temperature and then cooled in still air or oil. This process reduces the hardness and brittleness of the steel, making it tougher and more ductile.
Q. Austempering:
- Process characteristic: Austenite is converted into bainite.
- Austempering is a heat treatment process in which the steel is heated to a temperature above the upper critical temperature and then quenched in a bath of molten salt or oil at a temperature just above the martensitic transformation temperature. This process results in the formation of bainite, which has improved strength and toughness compared to martensite.
R. Martempering:
- Process characteristic: Cementite is converted into a globular structure.
- Martempering is a heat treatment process in which the steel is quenched from above the upper critical temperature and then held at a temperature just above the martensitic transformation temperature until the entire part has transformed into martensite. This process results in the formation of a globular structure of cementite, which improves the toughness and reduces the brittleness of the steel.
Based on the process characteristics given in the question, we can conclude that the most appropriate set of heat treatment process and the corresponding process characteristics is:
- P-4, Q-1, R-2
Explanation of the correct answer:
- Tempering (P) reduces both hardness and brittleness.
- Austempering (Q) converts austenite into bainite.
- Martempering (R) converts cementite into a globular structure.
Therefore, the correct answer is option C) P-4, Q-1, R-2.
The most appropriate set of heat treatment process and the corresponding process characteristics are as follows:
P. Tempering:
- Process characteristic: Both hardness and brittleness are reduced.
- In the tempering process, the hardened steel is heated to a temperature below the lower critical temperature and then cooled in still air or oil. This process reduces the hardness and brittleness of the steel, making it tougher and more ductile.
Q. Austempering:
- Process characteristic: Austenite is converted into bainite.
- Austempering is a heat treatment process in which the steel is heated to a temperature above the upper critical temperature and then quenched in a bath of molten salt or oil at a temperature just above the martensitic transformation temperature. This process results in the formation of bainite, which has improved strength and toughness compared to martensite.
R. Martempering:
- Process characteristic: Cementite is converted into a globular structure.
- Martempering is a heat treatment process in which the steel is quenched from above the upper critical temperature and then held at a temperature just above the martensitic transformation temperature until the entire part has transformed into martensite. This process results in the formation of a globular structure of cementite, which improves the toughness and reduces the brittleness of the steel.
Based on the process characteristics given in the question, we can conclude that the most appropriate set of heat treatment process and the corresponding process characteristics is:
- P-4, Q-1, R-2
Explanation of the correct answer:
- Tempering (P) reduces both hardness and brittleness.
- Austempering (Q) converts austenite into bainite.
- Martempering (R) converts cementite into a globular structure.
Therefore, the correct answer is option C) P-4, Q-1, R-2.
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From the lists given below, choose the most appropriate set of heat treatment process and the corresponding process characteristiesProcessP. TemperingQ. AustemperingR. MartemperingCharacteristics1. Austenite is converted into bainite2. Austenite is converted into martensite3. Cementite is converted into globular structure4. Both hardness and brittleness are reduced5. Carbon is absorbed into the metal[ME 2004]a)P-3, Q-1, R-5 b)P-4, Q-3, R-2c)P-4, Q-1, R-2 d)P-1, Q-5, R-4Correct answer is option 'C'. Can you explain this answer?
Question Description
From the lists given below, choose the most appropriate set of heat treatment process and the corresponding process characteristiesProcessP. TemperingQ. AustemperingR. MartemperingCharacteristics1. Austenite is converted into bainite2. Austenite is converted into martensite3. Cementite is converted into globular structure4. Both hardness and brittleness are reduced5. Carbon is absorbed into the metal[ME 2004]a)P-3, Q-1, R-5 b)P-4, Q-3, R-2c)P-4, Q-1, R-2 d)P-1, Q-5, R-4Correct answer is option 'C'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about From the lists given below, choose the most appropriate set of heat treatment process and the corresponding process characteristiesProcessP. TemperingQ. AustemperingR. MartemperingCharacteristics1. Austenite is converted into bainite2. Austenite is converted into martensite3. Cementite is converted into globular structure4. Both hardness and brittleness are reduced5. Carbon is absorbed into the metal[ME 2004]a)P-3, Q-1, R-5 b)P-4, Q-3, R-2c)P-4, Q-1, R-2 d)P-1, Q-5, R-4Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for From the lists given below, choose the most appropriate set of heat treatment process and the corresponding process characteristiesProcessP. TemperingQ. AustemperingR. MartemperingCharacteristics1. Austenite is converted into bainite2. Austenite is converted into martensite3. Cementite is converted into globular structure4. Both hardness and brittleness are reduced5. Carbon is absorbed into the metal[ME 2004]a)P-3, Q-1, R-5 b)P-4, Q-3, R-2c)P-4, Q-1, R-2 d)P-1, Q-5, R-4Correct answer is option 'C'. Can you explain this answer?.
From the lists given below, choose the most appropriate set of heat treatment process and the corresponding process characteristiesProcessP. TemperingQ. AustemperingR. MartemperingCharacteristics1. Austenite is converted into bainite2. Austenite is converted into martensite3. Cementite is converted into globular structure4. Both hardness and brittleness are reduced5. Carbon is absorbed into the metal[ME 2004]a)P-3, Q-1, R-5 b)P-4, Q-3, R-2c)P-4, Q-1, R-2 d)P-1, Q-5, R-4Correct answer is option 'C'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about From the lists given below, choose the most appropriate set of heat treatment process and the corresponding process characteristiesProcessP. TemperingQ. AustemperingR. MartemperingCharacteristics1. Austenite is converted into bainite2. Austenite is converted into martensite3. Cementite is converted into globular structure4. Both hardness and brittleness are reduced5. Carbon is absorbed into the metal[ME 2004]a)P-3, Q-1, R-5 b)P-4, Q-3, R-2c)P-4, Q-1, R-2 d)P-1, Q-5, R-4Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for From the lists given below, choose the most appropriate set of heat treatment process and the corresponding process characteristiesProcessP. TemperingQ. AustemperingR. MartemperingCharacteristics1. Austenite is converted into bainite2. Austenite is converted into martensite3. Cementite is converted into globular structure4. Both hardness and brittleness are reduced5. Carbon is absorbed into the metal[ME 2004]a)P-3, Q-1, R-5 b)P-4, Q-3, R-2c)P-4, Q-1, R-2 d)P-1, Q-5, R-4Correct answer is option 'C'. Can you explain this answer?.
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From the lists given below, choose the most appropriate set of heat treatment process and the corresponding process characteristiesProcessP. TemperingQ. AustemperingR. MartemperingCharacteristics1. Austenite is converted into bainite2. Austenite is converted into martensite3. Cementite is converted into globular structure4. Both hardness and brittleness are reduced5. Carbon is absorbed into the metal[ME 2004]a)P-3, Q-1, R-5 b)P-4, Q-3, R-2c)P-4, Q-1, R-2 d)P-1, Q-5, R-4Correct answer is option 'C'. Can you explain this answer?, a detailed solution for From the lists given below, choose the most appropriate set of heat treatment process and the corresponding process characteristiesProcessP. TemperingQ. AustemperingR. MartemperingCharacteristics1. Austenite is converted into bainite2. Austenite is converted into martensite3. Cementite is converted into globular structure4. Both hardness and brittleness are reduced5. Carbon is absorbed into the metal[ME 2004]a)P-3, Q-1, R-5 b)P-4, Q-3, R-2c)P-4, Q-1, R-2 d)P-1, Q-5, R-4Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of From the lists given below, choose the most appropriate set of heat treatment process and the corresponding process characteristiesProcessP. TemperingQ. AustemperingR. MartemperingCharacteristics1. Austenite is converted into bainite2. Austenite is converted into martensite3. Cementite is converted into globular structure4. Both hardness and brittleness are reduced5. Carbon is absorbed into the metal[ME 2004]a)P-3, Q-1, R-5 b)P-4, Q-3, R-2c)P-4, Q-1, R-2 d)P-1, Q-5, R-4Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
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