Question:
In hot working:
In hot working:
Show Hint
Hot working promotes grain refinement through dynamic recrystallization — a key advantage over cold working.
Updated On: Jun 21, 2025
- Annealing operation is not necessary
- Power requirements are low
- Surface finish is good
- Grain refinement is possible
Hide Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Hot working refers to the plastic deformation of metals above their recrystallization temperature.
This process allows new grains to form during deformation, replacing the deformed ones — this is known as dynamic recrystallization.
Hence, grain refinement occurs, improving mechanical properties.
Why the other options are incorrect:
- (1) Annealing may still be needed depending on application and final properties.
- (2) Power requirements are generally higher in hot working due to the heat involved.
- (3) Surface finish in hot working is typically poorer than in cold working due to oxidation and scaling.
This process allows new grains to form during deformation, replacing the deformed ones — this is known as dynamic recrystallization.
Hence, grain refinement occurs, improving mechanical properties.
Why the other options are incorrect:
- (1) Annealing may still be needed depending on application and final properties.
- (2) Power requirements are generally higher in hot working due to the heat involved.
- (3) Surface finish in hot working is typically poorer than in cold working due to oxidation and scaling.
Was this answer helpful?
0
0
Top Questions on Manufacturing Processes
- Group technology brings together and organizes:
- AP PGECET - 2025
- Mechanical Engineering
- Manufacturing Processes
- Which material is commonly used for pattern making?
- AP PGECET - 2025
- Mechanical Engineering
- Manufacturing Processes
- In metal cutting operations, discontinuous chips are produced while machining:
- AP PGECET - 2025
- Mechanical Engineering
- Manufacturing Processes
- In wire drawing operation, the maximum reduction per pass for perfectly plastic material in ideal condition is:
- AP PGECET - 2025
- Mechanical Engineering
- Manufacturing Processes
- CAD/CAM is hardware oriented, but gives it life.
- AP PGECET - 2025
- Mechanical Engineering
- Manufacturing Processes
View More Questions
Questions Asked in AP PGECET exam
- Let \( z \) be a complex variable and \( C : |z| = 3 \) be a circle in the complex plane. Then,\[ \oint_C \frac{z^2}{(z - 1)^2(z + 2)} \, dz = \]
- AP PGECET - 2025
- Complex numbers
- If \( \vec{F}(x, y, z) = 3x^2y\,\hat{i} + 5y^2z\,\hat{j} - 8xyz\,\hat{k} \) is a continuously differentiable vector field, then the curl of \( \vec{F} \) at (1,1,1) is ...............
- AP PGECET - 2025
- Calculus
- Let \( f(x) = x^3 - \dfrac{9}{2}x^2 + 6x - 2 \) be a function defined on the closed interval \([0, 3]\). Then, the global maximum value of \( f(x) \) is ...............
- AP PGECET - 2025
- Calculus
- For a stable closed loop system, the gain at phase crossover frequency should always be:
- AP PGECET - 2025
- Control Systems
- If the matrix \[ A = \begin{pmatrix} 3 & -1 & 1 \\ -1 & 5 & -1 \\ 1 & -1 & 3 \end{pmatrix} \] has three distinct eigenvalues, and one of its eigenvectors is \[ \begin{pmatrix} 1 \\ 0 \\ -1 \end{pmatrix}, \] then which of the following can be another eigenvector of \( A \)?
- AP PGECET - 2025
- Linear Algebra
View More Questions