“…Research on the manufacture of metal parts submitted to hardening processes in liquid and solid state, consisting in the ingot superficial alloying through vacuum casting followed by parts coating with a hardening mixture, an induction heat treating and a final heat treatment, is providing noticeable results as compared to these of the pre-existing technologies, both at national and international levels [1 -5]. Thus the new procedure, thanks to the simultaneity of the working stages: superficial alloying in the liquid phase during the casting, followed by solid phase hardening stages and processing in inductive field turns out to be a relatively simple and efficient process, with a coherent, viable and industrially adaptable technological flow [6,7].…”