Abstract
Abstract The use of cooling curves is increasingly required for the evaluation of oils used for quenching. Auditing agencies such as the National Aerospace and Defense Contractors Accreditation Program (NADCAP) and the Continuous Quality Improvement standard (CQI-9) are mandating cooling curve analysis at routine intervals. Specifications such as AMS 2759, Heat Treatment of Steel Parrs, General Requirements, are requiring detailed analysis of cooling curve behavior of quenchants to ensure that parts are properly quenched. A detailed analysis has been conducted of ASTM D6200, Standard Test Method for Determination of Cooling Characteristics of Quench Oils by Cooling Curve Analysis, to explore repeatability and precision in terms of laboratory integrity data, production lot data, and customer data. A single quench oil was used for the analysis.
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