Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
The influence of prior heat treatment on nitriding of AISI H13 steel
Submission Author:
Rodrigo Lupinacci Villanova , PR
Co-Authors:
Rodrigo Lupinacci Villanova
Presenter: Rodrigo Lupinacci Villanova
doi://10.26678/ABCM.COBEM2017.COB17-0302
Abstract
H13 steels are widely used for die casting molds, and nitriding is employed in order to increase the life of the tools, by reducing wear and thermal fatigue. For such application, nitriding is made after quenching and tempering heat treatments, and case depths of about 0.1mm are normally specified. In this work, the influence of quenching and tempering heat treatment made before nitriding was evaluated. In order to achieve different core hardness, different austenitizing and tempering temperatures were used, and specimens were submitted to one nitriding cycle. Nitrided layers were analysed in terms of effective depth, surface hardness, and scratch hardness by means of scratch tests. Results showed that the depth and surface hardness of the nitrided layer did not vary with prior heat treatments, but it was observed that the scratch hardness is not only a function of the nitrided layer hardness and depth; it also depends on the prior heat treatments carried out on the steel.
Keywords
Aço ferramenta AISI H13, nitriding, prior heat treatment., scratch test
