Rockett, Frank H. Engineering Consultant, Charlottesville, Virginia.
Last reviewed:June 2020
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The reheating of previously quenched alloy to a predetermined temperature below the critical range, holding the alloy for a specified time at that temperature, and then cooling it at a controlled rate, usually by immediate rapid quenching, to room temperature. Tempering has a long history, beginning as an empirical process to impart toughness. Consequently, the term is broadly applied to any process that toughens a material. See also: Alloy
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