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.
Amit said:
9 years ago
I think the depth of hardening (in hardenability) martensite is an important factor, but in hardness cementite is necessary.
Rushikesh Raval said:
10 years ago
Martensite is a crystalline structure while as cementite is intermetallic compound or constituent in the steel. As carbon % increase hardness increase.
Paro said:
10 years ago
Cementite is the hardest form of steel. So presence of cementite increases hardness.
Martensite is formed after heat treatment but cementite presence can be found out without heat treatment.
So in this condition cementite is correct answer.
Martensite is formed after heat treatment but cementite presence can be found out without heat treatment.
So in this condition cementite is correct answer.
Jabalappa said:
1 decade ago
Some more explanations please.
Afrasiyab said:
1 decade ago
For hardness martensite should be present.
Thulasiraman said:
1 decade ago
We get Martensite after heat treatment only. But we need Cementite presence in the steel before doing HT.
Naresh said:
1 decade ago
Which is the hardest face in steel Cementite or Martensite?
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