Mechanical Engineering - Engineering Materials - Discussion
Discussion Forum : Engineering Materials - Section 1 (Q.No. 42)
42.
The hardness of steel increases if it contains
Discussion:
17 comments Page 2 of 2.
R Praveen said:
8 years ago
The hardness due to Martensite is due to the transformation of austenite, due to heat treatment, although the composition remains the same.
In case of cementite, the hardness is due to the composition, in which the carbon content is higher, without undergoing any heat treatment (solely based on the solubility of carbon).
In case of cementite, the hardness is due to the composition, in which the carbon content is higher, without undergoing any heat treatment (solely based on the solubility of carbon).
Mechio said:
7 years ago
(D) Martensite is the correct answer.
Eswarsai said:
7 years ago
Please confirm the answer? Is Martensite or is cementite.
Sumit kumar said:
7 years ago
Martensite is unstable.
Bhargav said:
7 years ago
Martensite is the hardest form of steel which is produced by Directly quenching it in oil or water after heat treatment process but their is presence of cementite, So cementite (Fe3C) is necessary to increase the hardness of steel, So cementite is the correct answer.
(1)
Rajkotha said:
4 years ago
Martensite is the right option.
Niwash said:
4 years ago
Cementite is the hardest structure on the iron carbon diagram, but the hardness of steel increases if it contains martensite.
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