SNAP TEMPER. A precautionary interim stress-relieving treatment applied to high-hardenability steels immediately after quenching to prevent cracking because of delay in tempering them at the prescribed higher temperature.
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TRANSGRANULAR CRACKING. Cracking or fracturing that occurs through or across a crystal or grains. Also called transcrystalline cracking.
THERMOCOUPLE. A device for measuring temperatures, consisting of lengths of two dissimilar metals or alloys that are electrically joined at one end and […]
SUPERCOOLING. Cooling below the temperature at which an equilibrium phase transformation can take place, without actually obtaining the transformation.
SECONDARY HARDNESS. The higher hardness developed by certain alloy steels when they are cooled from a tempering operation. This should always be followed […]