Milliseconds pulse induction hardening
by A. Aliferov; M. Forzan; S. Lupi
International Journal of Microstructure and Materials Properties (IJMMP), Vol. 13, No. 1/2, 2018

Abstract: This paper presents a technology that allows a fast surface induction hardening of workpiece of relative small dimension by means of a single current shot. This technology was proposed already in 50's but at that time the availability of power converters limited its industrial application to the hardening of very small surfaces. Nowadays, the process can be applied in automotive industrial applications thanks to the availability of power converters in the megawatt range. Pulse induction hardening process is characterised by high power densities, heating times in the range of tens to hundreds of milliseconds and cooling rates attained by self-quenching without the use of external quenching means. In the paper, authors give some practical diagrams for the preliminary definition of the heating parameters that could help the design of this type of process.

Online publication date: Tue, 24-Jul-2018

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