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'Tempering' of quenched martensitic steel is necessary to improve the
- a)Hardness of the metal
- b)Surface texture or the metal
- c)Corrosion resistance of the metal
- d)Ductility or the metal
Correct answer is option 'D'. Can you explain this answer?
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'Tempering' of quenched martensitic steel is necessary to impr...
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Tempering of quenched martensitic steel is necessary to improve the ductility of the metal.
Explanation:
Martensitic steels are hard and brittle after quenching due to the formation of martensite, which is a hard and brittle phase. The hardness of the martensitic steel can be too high for some applications, making it difficult to machine or use. The toughness or ductility of the steel can be improved by tempering the steel.
Tempering involves heating the quenched steel to a temperature below the critical temperature and holding it at that temperature for a specific time. The temperature and time of tempering are chosen based on the desired properties of the steel.
During tempering, the martensite phase decomposes into a mixture of ferrite and carbide phases, which are less hard and more ductile than martensite. The carbon atoms that were trapped in the martensite phase are redistributed, leading to a decrease in hardness and an increase in ductility.
In summary, tempering of quenched martensitic steel is necessary to improve the ductility of the metal, making it more suitable for certain applications.
Explanation:
Martensitic steels are hard and brittle after quenching due to the formation of martensite, which is a hard and brittle phase. The hardness of the martensitic steel can be too high for some applications, making it difficult to machine or use. The toughness or ductility of the steel can be improved by tempering the steel.
Tempering involves heating the quenched steel to a temperature below the critical temperature and holding it at that temperature for a specific time. The temperature and time of tempering are chosen based on the desired properties of the steel.
During tempering, the martensite phase decomposes into a mixture of ferrite and carbide phases, which are less hard and more ductile than martensite. The carbon atoms that were trapped in the martensite phase are redistributed, leading to a decrease in hardness and an increase in ductility.
In summary, tempering of quenched martensitic steel is necessary to improve the ductility of the metal, making it more suitable for certain applications.
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'Tempering' of quenched martensitic steel is necessary to improve thea)Hardness of the metalb)Surface texture or the metalc)Corrosion resistance of the metald)Ductility or the metalCorrect answer is option 'D'. Can you explain this answer?
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