THERMO-FLUID-DYNAMICS QUENCHING MODEL: EFFECT ON MATERIAL PROPERTIES

• DOI: 10.5151/meceng-wccm2012-19499
• Publication Date: 2014-05-28T13:41:35Z
• Authors: D. N. Passarella; R. L-Cancelos; I. Vieitez; F. Varas; E. B. Martín
• Keywords: Leidenfrost effect

A fully-coupled model of quenching by submerging for steel workpieces is presented. The includes cooling the piece due to piece-to-bath heat transfer calculations solving multiphase problem an evaporable fluid, as well corresponding metallurgical transformations, generation residual stresses and associated geometrical distortions. takes into account different boiling stages, from film at very high workpiece surface temperatures, single-phase convection temperatures below saturation. evolution activation each mechanism depend on dynamics vapor-liquid system bath. flow was modeled using drift-flux mixture model, including equation conservation energy liquid phase. Metallurgical distortions end process, are obtained based rates along piece. final distribution phases integration thermal information CCT diagrams studied steels. analysis deformations elasto-plasticity (without viscosity effects), transformation induced plasticity hardening restoring phenomena. Comparison results considering approach presented here versus a simplified indicates that level noticeable implying necessity developing more precise model.