Mechanical Engineering - Engineering Materials - Discussion
Discussion Forum : Engineering Materials - Section 5 (Q.No. 9)
9.
Silicon in cast iron
Discussion:
8 comments Page 1 of 1.
DSM said:
1 decade ago
Silicon makes the material hard and brittle.
Shyam said:
1 decade ago
Sulphur makes the material hard and brittle.
Pravin said:
9 years ago
Which one is right? please tell me.
Bhusan said:
9 years ago
Given answer is correct. I agree.
Vijay said:
8 years ago
Option D is correct.
Silicon increases and decreases shrinkage.
Silicon increases and decreases shrinkage.
Biren said:
8 years ago
A is the absolutely right answer. I agree.
Kishan Ahir said:
7 years ago
Silicon make free graphite flakes on cast iron. Thus it make cast iron soft and machinable.
(1)
Ravinder said:
4 years ago
Silicon increases the hardness for steel.
But for cast iron as in this case, it makes the iron soft and easily machinable (formation of graphite flakes on cast iron).
So the correct answer is A.
Also, it increases fluidity but not fusibility so the answer D is not right.
But for cast iron as in this case, it makes the iron soft and easily machinable (formation of graphite flakes on cast iron).
So the correct answer is A.
Also, it increases fluidity but not fusibility so the answer D is not right.
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