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1. describe why Low carbon steel in tile normalised condition is stronger than tile same steel ill tile annealed condition.

2. Case carburizing heat treatment is not usually carried out for medium carbon steels. describe why?

3. What do you mean by "critical cooling rate" in hardening of steels?

4. What do you mean by "heat treatment"? prepare down its purpose.

5. prepare down the factors affecting the CCR?

6. What do you mean by normalizing? describe its purpose.

7. What do you mean by quenching? prepare down some of the quenching medium.

8. prepare downthe factors affecting the hardness?

9. What do you mean by hardnability? prepare down the factors affecting it?

10. What do you mean by induction hardening?

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