Optimal heat induction treatment of titanium alloys
ISSN: 0332-1649
Article publication date: 17 January 2020
Issue publication date: 11 March 2020
Abstract
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 system will 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.
Keywords
Acknowledgements
This research has been supported by the Ministry of Education, Youth and Sports of the Czech Republic under the RICE New Technologies and Concepts for Smart Industrial Systems, project LO1607 and project of University Grant Agency SGS-2018-043. The research was also supported by Act 211 Government of the Russia Federation, contract № 02.A03.21.0006.
Citation
Smolyanov, I.A., Kotlan, V. and Doležel, I. (2020), "Optimal heat induction treatment of titanium alloys", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 39 No. 1, pp. 53-65. https://doi.org/10.1108/COMPEL-05-2019-0212
Publisher
:Emerald Publishing Limited
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