Explosive Surface hardening of the Austenitic Steel

Kovács, Tünde Anna (2025) Explosive Surface hardening of the Austenitic Steel. ACTA MATERIALIA TRANSYLVANICA (EN), 8 (2). pp. 70-73. ISSN 2601-8799

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Abstract

The research focuses on the presentation and analysis of explosive welding and hardening processes. In practice, the direct method is used for explosive hardening, in which the explosive is placed on the surface of the metal to be hardened. The indirect method is not yet common in practice. In the indirect process, similar to explosive cladding, there is a gap between the explosive and the surface of the metal to be hardened. We conducted experiments on two different steel grades (X120Mn12, X5CrNi1810) using the same quantity and quality of explosive. Following direct and indirect hardening, the hardness measurement results showed that the hardness achievable with direct hardening (238 HV for X120Mn12, 263 HV for X5CrNi1810) was lower than that achieved by indirect hardening (472 HV for X120Mn12, 322 HV for X5CrNi1810) using a 1.5 mm gap distance.

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