Resumen

MORENO, A.; LEITE, M. V.  y  BORGES, P. C.. Plasma Nitriding Effect on Precipitation Hardening of 15-5 PH Steel. Inf. tecnol. [online]. 2005, vol.16, n.2, pp.35-39. ISSN 0718-0764.  http://dx.doi.org/10.4067/S0718-07642005000200006.

Stainless steel precipitation hardening was evaluated by the thermal treatment for precipitation combined with plasma nitriting surface hardening treatment of 15-5 PH steel. Several thermal treatments were applied to study the core and surface hardness evolution during the treatment process. The core hardness was improved by the precipitation and the surface as well as by the nitrided layer for all the conditions used. For all the samples the same time (2 hours) was used and the same nitriding gas mixture (25% Nitrogen and 75% Hydrogen) was employed. Metalographic analysis, Vickers HV10,  and microVickers test 50g were used to study the behavior of the steel. The results show that the precipitation hardening and plasma nitriding can be done using the same cycle to improve core and surface hardening.

Palabras clave : nitriding; plasma; 15-5 PH steel; precipitation hardening velocity.