Heat Treatment

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Date:	Wednesday, 2 September 2026, 7:39 AM

1. Heat Treatment

Annealing softens metal by heating above the recrystallisation temperature and cooling slowly.

Quenching cools rapidly in water or oil, trapping carbon in a martensite structure.

Safety glasses must be worn in the foundry at all times.

Tempering reduces brittleness after quenching by reheating to between 150 and 650 degrees Celsius.