Question

Consider a plain carbon steel (0.65 wt% carbon) that was successfully water quenched and then tempered at 400 degrees C for 1 hour. Determine the identity of the phases and the phase fractions expected after tempering.

If the tempering temperature is decreased to 300 degrees celsius but the tempering time is kept constant, what would the effect on the proportion of phases present and the yield strength?

Answer 1