An inverse approach for the prediction of the temperature evolution during induction heating of a semi-solid casting billet

摘要

An inversion technique is developed to recover the temperature distribution along the radius of a cylindrical biller at the end of the induction heating phase in a semi-solid process using the surface temperature measurement. In the process, a metallic billet is first heated in an induction Furnace until it reaches a semi-solid state (partially liquid and partially solid). Then, it is injected into a die and kept there until it solidifies. Subsequently, the die opens, the part is ejected and the cycle starts again. The temperature distribution within the biller at the end of the heating phase is of prime importance for the success of the process and the quality of the product. The inverse algorithm is applied to experimental data recorded by an infrared camera on the side of an aluminium biller heated in an IHS induction heating station. The temperature distribution in the biller is predicted for different heating power levels. [References: 25]