Age hardening is a process done at______________?
Correct answer: A. Heating up to 200 - 450°C for 15 - 30 min and quenching in water
- A. Heating up to 200 - 450°C for 15 - 30 min and quenching in water
- B. Heating at 700°C for 10 - 15 min and quenching in water
- C. Heating at 700°C for 1 hour and quenching in water
- D. Heating above 700°C for 30 min and quenching in water
Explanation
Age hardening commonly involves heating an alloy in the lower-temperature range of about 200–450°C for a controlled period, followed by quenching. The 700°C schedules describe solution treatment more than the aging step itself.
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