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Reheating quenched (martensitic) steel to a temperature below the eutectoid temperature to reduce brittleness is called:

1. Tempering
2. Annealing
3. Normalizing
4. Carburizing

Answer

A. Tempering

Solution

Tempering trades some hardness for improved toughness and ductility.

More Engineering Materials questions

1. Rapid cooling of steel from the austenite region in water, oil or brine is called:
2. Heating steel into the austenite region and cooling it in still air is called:
3. Heating steel into the austenite region and cooling it slowly in the furnace is called:
4. A steel with less than 0.76% carbon is called a:
5. The very hard, brittle microconstituent formed by rapidly quenching austenite is:
6. The lamellar mixture of ferrite and cementite formed by the eutectoid reaction in steel is called:
7. The BCC phase of iron (α-iron) at room temperature is called:
8. Iron carbide ( Fe3C) is also called:
9. The eutectic composition in the iron–iron carbide system is approximately:
10. The eutectoid temperature in the iron–iron carbide system is approximately:

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