Banca de QUALIFICAÇÃO: EMERSON DE ALMEIDA RODRIGUES

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : EMERSON DE ALMEIDA RODRIGUES
DATE: 28/11/2025
TIME: 14:00
LOCAL: Campus Caxias do Sul
TITLE:

INFLUENCE OF PLASMA NITRIDING PARAMETERS ON THE SURFACE
PROPERTIES OF TOOL STEEL TOOLOX 44

KEY WORDS:

plasma nitriding, microabrasive wear, surface hardness, tool steel T44.

PAGES: 27
BIG AREA: Engenharias
AREA: Engenharia de Materiais e Metalúrgica
SUMMARY:

This study investigates the influence of different plasma nitriding conditions on
improving the wear resistance and surface hardness of the Tool Steel T44. Three distinct
treatments were analyzed — Nmáx C, Nmáx D, and Nmáx CB — with variations in
temperature, time, and gas composition parameters. The samples were characterized by

microabrasion tests, surface hardness measurements, and microhardness profiles in cross-
section. The results showed that the Nmáx D treatment provided the greatest depth of the

nitrided layer and the highest surface hardness values, with sample A2 standing out. The
Nmáx CB treatment resulted in thinner layers, but with good uniformity and
reproducibility among the samples. The Nmáx C process showed higher variability, but
sample A3 stood out with the lowest wear coefficient, indicating excellent wear resistance
even with reduced depth. A direct correlation was observed between higher surface
hardness and lower wear, reinforcing the effectiveness of plasma nitriding in modifying
the tribological properties of T44 steel. The results highlight the importance of process
parameter control to maximize the performance of tools subjected to intense wear. This

study contributes to the enhancement of surface treatment techniques applied to high-
performance materials, aiming at greater durability, production efficiency, and reduced

operational costs.

COMMITTEE MEMBERS:
Interna - DANIELA LUPINACCI VILLANOVA
Interna - CINTHIA GABRIELY ZIMMER