Title:	Optimal heat induction treatment of titanium alloys
Authors:	Smolyanov, Ivan Alexandrovich Kotlan, Václav Doležel, Ivo
Citation:	SMOLYANOV, IA., KOTLAN, V., DOLEŽEL, I. Optimal heat induction treatment of titanium alloys. Compel-the International Journal for computation and mathematics in electrical and electronic engineering, 2020, roč. 39, č. 1, s. 53-65. ISSN 0332-1649.
Issue Date:	2020
Publisher:	Emerald
Document type:	článek article
URI:	2-s2.0-85078229204 http://hdl.handle.net/11025/39616
ISSN:	0332-1649
Keywords in different language:	control systems;induction heating;optimal control;thermal analysis;finite element method
Abstract in different language:	Purpose – This paper aims to propose a number of approaches to reduce the temperature gradient of titanium billets in the heat treatment process. Design/methodology/approach – Modeling physical processes in the induction unit is calculated by the finite element method. Required power was calculated based on the fact that all the induced power is allocated in a certain layer and there are loss flows and heating flows. Also, an opportunity is offered to reduce temperature difference using numerical optimization, control system based on proportional-integral regulator and ballast blank. Findings – The asymmetry of the magnetic field at the ends of the inductor significantly affects the temperature uniformity along the length of the workpiece. Increasing the length of the workpiece by adding ballast blanks reduces the temperature drop. Also, increasing the non-magnetic gap in some cases it is possible to improve the quality of through heating. Research limitations/implications – The results of this study are verified only for a number of titanium alloys. Therefore, this knowledge is appropriate to apply for this type of materials. In future studies, it is possible to expand the possibilities of the considered approaches for other types of materials. Practical implications – Part of the study will be used to industrial plant for purpose of heat treatment of titanium alloys workpiece. Especially, control systemwill be basically made based on the model. Originality/value – A novel methodology of induction heating of titanium alloy Ti6Al4V in the form of cylindrical billets is presented that simplifies the process and improves temperature uniformity along the radius and length of the billet by optimizing the shape of the inductor and selecting suitable power modes.
Rights:	Plný text je přístupný v rámci univerzity přihlášeným uživatelům. © Emerald
Appears in Collections:	Články / Articles (RICE) Články / Articles (KTE) OBD

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