Abstract
A two-dimensional numerical model of ingot solidification (60 kg) of high alloy tool steel, 165XCrMoW12 (DIN) is presented. The numerical model is based on Fourier's differential equation, including the equation of latent heat that is released during crystallisation, as well as the energy of lattice defects. To solve the numerical model a finite difference method was used. On the basis of numerical model results, it is possible to calculate temperature distribution, temperature gradient, distribution solid and liquid phase, and increment of solid fraction. After casting the steel in a mould, measurements of temperature change during steel ingot solidification, under laboratory conditions, were carried out. Cooling curves obtained by experiment were compared with those obtained on the basis of the numerical model, and good agreement was obtained.
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