Martempering

Quenching an austenitized ferrous alloy in a medium at a temperature in the upper part of themartensite range, or slightly above that range, and holding it in the medium until the temperature throughout thealloy is substantially uniform. The alloy is then allowed to cool in air through the martensite range. See also: Martensite.
Found on http://www.diracdelta.co.uk/science/source/m/a/martempering/source.html

Martempering

(Interrupted Quenching) A hardening treatment of a steel involving a slow cool through the martensitic transformation range to reduce stresses associated with the quenching of austenite. An important aspect of martempering is that no transformation product other than martensite should form.
Found on http://www.metaltek.com/value-engineering/glossary.html
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