Surface property control by electron beam deflection during hardening

Jiří Matlák, Ivo Dlouhý


The usage of the high-energy electron beam source enables repeated surface quenching of chosen locations of an engineering part surface. Different techniques of electron beam deflection allow creating hardened layers of different shapes, hardness levels and thicknesses. Experiments were carried out with 42CrMo4 (1.7225) steel. The deflection modes tested were one-point, 6-point, line, field, and meander. The influence of process speed and defocusing of the electron beam was also taken into account. The electron beam surface quenching resulted in a very fine martensitic microstructure with a hardness of over 700 HV0.5. The thickness of the hardened layers depends on the deflection mode and is affected directly (except field deflection) by process speed. The maximum hardened depth (NCHD) was 1.49 mm. Electron beam defocusing affects the width of the hardened track and can cause extension of the trace up to 40%. The hardness values continuously decrease from the surface to the material core.


Electron beam, surface hardening, 42CrMo4 steel, beam deflection

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R. Zenker: Modern thermal electron beam processes: Research and industrial application. La Metallurgia Italiana. 2009, Aprile, s. 8.

D. Dimitrov, M. Aprakova, S. Valkanov, P. Petrov: Electron beam hardening of ion nitrided layers (1998) Vacuum, 49 (3), pp. 239-246.

R. Zenker, H.-J. Spies, A. Buchwalder, G. Sacher: Combination of thermal surface treatment by high energy beams with thermochemical treatment and hard protective coating - State of the art (2006) "Proceedings - 15th IFHTSE - International Federation for Heat Treatment and Surface Engineering Congress 2006", pp. 214-219.

Y.F. Ivanov, D.A. Bessonov, S.V. Vorob'ev, et al.: On the fatigue strength of grade 20Cr13 hardened steel modified by an electron beam (2013) Journal of Surface Investigation, 7 (1), pp. 90-93.

S. Duan, C. Qin, B. Li: Microstructure and properties of semi-HSS treated by laser quenching (2015) Jinshu Rechuli/Heat Treatment of Metals, 40 (9), pp. 76-78.

R. Zenker, A. Buchwalder: Elektronenstrahl-Randschichtbehandlung: Inovative Technologienfür höchste industrielle Ansprüche. 2nd edition. Germany: pro-beam AG&Co. KGaA, 2010.

K.P. Friedel, J. Felba, I. Pobol, A. Wymyslowski: A systematic method for optimizing the electron beam hardening process (1996) Vacuum, 47 (11), pp. 1317-1324.

K. Vutova, V. Donchev, V. Vassileva, G. Mladenov: Thermal processes in electron-beam treatment of metals (2014) Metal Science and Heat Treatment, 55 (11-12), pp. 628-635.

R.G. Song, K. Zhang, G.N. Chen: Electron beam surface treatment. Part I: Surface hardening of AISI D3 tool steel (2003) User Modeling and User-Adapted Interaction, 69 (4), pp. 513-516.

A. Buchwalder, N. Klose, A. Jung, et al.: Improved surface properties of nodular cast iron using electron beam remelting and alloying with nickel based additives. (2016) Electrotechnica and electronica E+E. Varna.


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