Mechanical Engineering - Engineering Materials - Discussion
Discussion Forum : Engineering Materials - Section 2 (Q.No. 2)
2.
The hardness of steel depends upon the
Discussion:
32 comments Page 1 of 4.
G Reddy said:
5 years ago
Carbon increases the hardness of iron.
Cementite increases the hardness of steel.
Cementite increases the hardness of steel.
(1)
Sai said:
6 years ago
In Rs khurmi book also he said the amount of cementite is given. So cementite is right.
(1)
DARSHAN S B said:
6 years ago
I think carbon increase hardness of cast iron.
But cementite increase hardness of steel.
But cementite increase hardness of steel.
(1)
Zeeshan said:
8 years ago
I have a practical case to discuss.
A part made from carbon steel become cracked after welding. We have checked the hardness of cracked part and an another part that was not cracked after welding. Hardness was almost same. (92~97 HRB). The only difference between two samples was one that was not cracked when flatten with hammer become flat easily and another one becomes further cracked and split into two pieces during flattening.
A part made from carbon steel become cracked after welding. We have checked the hardness of cracked part and an another part that was not cracked after welding. Hardness was almost same. (92~97 HRB). The only difference between two samples was one that was not cracked when flatten with hammer become flat easily and another one becomes further cracked and split into two pieces during flattening.
Kamran Ashraf said:
4 years ago
Option B is right.
If carbon was not in the option then cementite will be the answer but out of cementite and carbon, carbon is the main reason for hardness of steel.
If carbon was not in the option then cementite will be the answer but out of cementite and carbon, carbon is the main reason for hardness of steel.
Chandraveer said:
5 years ago
I think the right answer is Cementite it contains.
Ref: RS Khurmi.
Ref: RS Khurmi.
Neeraj said:
5 years ago
Hardness of steel depends upon the amount of carbon present and heat treatment.
Haie said:
6 years ago
Option C is right.
Sid said:
7 years ago
The correct Answer will be C.
Naveen said:
7 years ago
I think the amount of cementite contains is the correct answer.
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