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Quenching severity is agitation-dependent and therefore, magnitude and turbulence of fluid flow around a part in the quench zone are critically important relative to the uniformity of heat transfer throughout the quenching process. This article provides an overview of the measurement principles for different types of flow devices used in production quench tanks, namely, vane sensors, fluid-quench sensors, caterpillar quench-evaluation sensors, and thermal probes. Various methods of flow measurement in commercial quench tanks may be acceptable for adequate control to ensure a high-quality production process.

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G.E. Totten, Quench Process Sensors, Steel Heat Treating Fundamentals and Processes, Vol 4A, ASM Handbook, Edited By Jon L. Dossett, George E. Totten, ASM International, 2013, p 192–197,

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