“…Appropriate selection of the process parameters makes it possible to obtain surface layers with a variety of structures, which is much more difficult in the case of conventional nitriding methods (Çelik et al, 2000;Karaoğlu, 2003;Rakowski et al, 2006). An analysis of the literature (Albarran et al, 1992;Berkowski, 2005;Blicharski, 2012;Borgolli et al, 2002;Głowacki et al, 2005aGłowacki et al, , 2005bHöck et al, 1996;Karamiş et al, 2019;Kovacı et al, 2016b;Krbaťa et al, 2019;Kusmič et al, 2021;Ozbaysal et al, 1986;Podgornik & Vižintin, 1999, 2001Skonieski et al, 2013;Zhao et al, 2021) allows us to conclude that it is preferable to produce nitrided layers consisting of a compound zone and a diffusion zone. However, for some applications, a more favourable set of properties is offered by the diffusion layer alone -good resistance to abrasive wear, thermal fatigue and impact strength.…”