44.3 PRACTICE PROBLEMS

---

1. What is the purpose of heat treating?

2. How can steels be softened? How can steels be hardened?

3. How can aluminum be hardened?

4. How does case hardening work?

5. What techniques can be used to harden specific surfaces?

6. List and describe 6 different applications of heat treating.

7. Explain how the following changes the metals; a) recrystalization, b) smaller broken up grains, c) increase of carbon.

8. What is the difference between annealing and tempering?

9.