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Predicted response of microstructure, distortion, and residual stress in carburized steels cooled via oil and high intensity quenching
Baker, Daniel
Baker, Daniel
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2010
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Heat treatment simulations provide a new capability to understand and predict complicated responses, where thermal, mechanical, and microstructural effects are coupled. Simulations using DANTEĀ® compared the response of carburized and non-carburized 4120, 4320, and 8620 to oil and high intensity quenching. High intensity quenching involves high heat transfer rates and has the potential to reduce alloy content and carburization level compared to hot oil quenching. The simulations utilized a simple rod shape in order to minimize part geometry effects. The development of the microstructure, residual stress, and distortion are compared to understand the differences between high intensity quenching and oil quenching. The simulations predicted compressive residual hoop stresses at the surface for all high intensity quench conditions. In contrast, oil quenching produced compressive residual hoop stresses at the surface in the carburized condition and tensile residual hoop stresses in the non-carburized condition.
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