Metallurgical Principles and Practice of Engineering (PE) Study Guide: Question #27

It Is the Policy of The Minerals, Metals & Materials Society (TMS) to Encourage the Professional Registration of Metallurgical Engineers.
Specialty steels such as tool steels and bearing steels have severe duty cycles. They require good fatigue life & wear resistance and often need complex heat treatments. Careful selection of materials and processing cycles is required to maximize properties and avoid rejection rates. Which of the following treatments will give the best properties in tool steel?

(A)	Heat the steel into the all austenite range (i.e. well above Acm) and temper for one hour at 800°F.
(B)	Heat the steel into the all austenite range (i.e. well above Acm) and water quench.
(C)	Heat the steel into the all austenite range, (i.e. well above Acm), oil quench to room temperature and temper for one hour at 800°F.
(D)	Heat the steel above Acm temperature, oil quench to room temperature, temper at 800°F for one hour minimum and refrigerate to below -32°F.

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