Question

Heat Treating 7. Before heat treating, the Ol Tool Steel used for our pin punch is in annealed condition. This allows good machinability due to a high level of 8. After quenching from its transformation temperature, the pin punch has highbut is brittle. 9. Finally, the pin punch is tempered to restoreso that it can be struck without cracking a. Hardness c. Yield Strength e. Tensile Strength f. Ductility g. Toughness h. Elasticity b. Bend Strength d. Stress 10. (Multiple Choice) What type of quenchant is used for the O1 Tool Steel? a. Polymer b. Waterc. Air d. Oil e. Brine

Answer 1

8. After quenching from its transformation temperature, the pin punch has high Hardness, but is brittle.

9. Finally, the pin punch is tempered to restore Toughness, so that it can be stuck without cracking.

10. d. Oil is used as quenchant for O1 tool steel.