Abstracts Book - IMRC 2018

• SA5-P013
SURFACES PROTECTION TROUGH CONTROLLED OXIDATION
WITHIN NITRIDED BONDS FOR PVD COATINGS.
Gilberto Enoc García Acosta 1
1 Tecnológico de Monterrey, Ingenieria, Mexico.
This project is based on a form that allows to avoid the oxidation of a material,
specifically tungsten carbide because the material used in high speed cutting
tools. Given that tools are exposed to extreme conditions, such as high
temperatures, constant friction, which generates a surface wear. Hence, cutting
tools, specifically, end mills have been chosen to be coated with Chromium
Nitride, due to its characteristics and background materialized in the durability
of the material. After this, tools were subject to a second coating with Chromium,
which in a controlled atmosphere was processed to oxidation, to obtain
chromium IV oxide, preventing the piece oxidizing.
To verify that the results were applied optimally, the standards applied were
met, a process was carried out to perform a characterization that included the
following studies heat transfer test, X-ray diffraction by grazing beam, microhardness,
saline chamber corrosion test and machining test. These were used
to determine if the tool had a longer lifespan with the new elements (Chromium,
Nitrogen and Oxygen). Wear tests were carried out, which consisted of
undergoing the tool in the usual working conditions, that is, the machine of cuts
MAQUINO PS95. On tools surface quality was measured before and after the
cutting against steel D2, one of the most resistant steels in the industry, the
results were favorable showing approximately 30% greater resistance of the
coated tool to that the base tool.
Keywords: Coat, tool, oxidation
Presenting authors email: gilberto.garcia@3gherramientas.com