What effect does chromium and molybdenum have on the heat treating characteristics of steel? Does the addition of alloying elements affect the hardness of the steel? Do the added elements affect the resulting microstructure?
Discuss the differences in hardness expected for oil vs. water quenched steel. Why is oil rather than water quenching usually used in industry?
Explain why tempering is necessary and discuss the benefits of first hardening steel by quenching and then tempering afterwards. What are some of the disadvantages of quenching and tempering to harden steel?
Describe two applications where alloy steel may be used. What are some advantages of using low alloy steel over plain carbon steel?
5. Of all the materials tested in the labs (wood, PVC, aluminium, steel, etc.) which material would be best for making an ice-pick (a tool used to break up, pick at, or chip at ice)? Justify your reasoning.
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