“…Modification methods of boronized layers include production of single-phase Fe 2 B layers [3], or complex combinations of well-known processes such as nitriding and boronizing [10], nickelizing with boronizing [4], whether, for example chromizing with boronizing [5,13]. Laser modification of surface layers is becoming increasingly popular and widely used [3,4,7,8,[19][20][21][22][23][24][25][26][27][28][29][30][31][32][33]. By using the high energy of laser beam can be modified the diffusion boronized layer, and this way the mild microhardness gradient can be obtained.…”