Mechanical Engineering - Engineering Materials - Discussion

Discussion Forum : Engineering Materials - Section 3 (Q.No. 36)
36.
In process annealing, the hypo-eutectoid steel is
heated from 30° C to 50° C above the upper critical temperature and then cooled in still air
heated from 30° C to 50° C above the upper critical temperature and then cooled suddenly in a suitable cooling medium
heated from 30° C to 50° C above the upper critical temperature and then cooled slowly in the furnace
heated below or close to the lower critical temperature and then cooled slowly
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
11 comments Page 1 of 2.

Dibakar Borah said:   9 years ago
No, the answer is wrong. The answer is C.

I am 100%. Because in annealing process Hypoeutectoid steel (8% carbon) is headed to 30 degree celsius to 50 degree celsius above the upper critical tempered and cool in the furnace itself by switching off the furnace or the steel is covered either in sand or dry lime and dry ash.
(1)

Mohit Bora said:   9 years ago
The question isn't about annealing. It's about "process annealing" aka low-temperature annealing. And in this process metal is heated below low critical temperature. Generally 550-650 degree Celcius. So and is (d) my brother BORAH.

Rajendra said:   5 years ago
Annealing is not only one process and it contains more.

In that full annealing, process annealing, etc.

So in this question, option D is correct.

HAREESH said:   8 years ago
Annealing is two types.

1. Full annealing (upper critical temp).

2. Process annealing (LOWER CRITICAL TEMP).
(2)

Ankit said:   6 years ago
For annealing process -temp below or close to the LCT, so D option is right.

Ref: RS Khurmi.

Raisahab said:   6 years ago
Answer C is correct because in annealing metal is cooled very slowly in the furnace.

Ketan said:   8 years ago
Right @Tejaswini.

If "full annealing" is here, than it will be option 'c'.

Sanjeev kumar said:   8 years ago
It is the process of annealing hence the answer is correct.

Answer is D.
(1)

Prathmesh Jamdade said:   6 years ago
No. Answer is wrong because Annealing is done furnace itself only.

Santosh said:   9 years ago
I hope the answer is wrong.

And the correct answer is option C.


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