Question:
Tempering of quenched steel is primarily done to
Tempering of quenched steel is primarily done to
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Quench for Hardness, Temper for Toughness. Quenching alone makes steel glass-brittle.
Updated On: Jul 4, 2026
- Increase hardness and brittleness
- Reduce brittleness and increase toughness
- Melt the steel partially
- Remove carbon from the surface
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The Correct Option is B
Solution and Explanation
Step 1: Concept Quenching produces martensite, which is extremely hard but also very brittle and contains high internal stresses.
Step 2: Meaning Tempering involves reheating the quenched steel to a temperature below the lower critical temperature.
Step 3: Analysis This reheating allows for the relief of internal stresses and the transformation of brittle martensite into tempered martensite.
Step 4: Conclusion
The primary goal is to sacrifice some hardness to significantly reduce brittleness and improve the toughness of the part. Final Answer: (B)
Step 2: Meaning Tempering involves reheating the quenched steel to a temperature below the lower critical temperature.
Step 3: Analysis This reheating allows for the relief of internal stresses and the transformation of brittle martensite into tempered martensite.
Step 4: Conclusion
The primary goal is to sacrifice some hardness to significantly reduce brittleness and improve the toughness of the part. Final Answer: (B)
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