Combined Use of Surface Texturing, Plasma Nitriding and DLC Coating on Tool Steel
Source abstract
Abstract
In cold rolling, a textured roll can be used to imprint a desired surface topography onto the sheet during rolling. This work proposes the use of diamond-like carbon (DLC) coatings to protect the surface topography of the rolls in replacement of the carcinogenic hard chrome. For that, hydrogenated amorphous carbon (a-C:H) was deposited on plasma nitrided tool steel, both for ground and textured specimens. Changes in surface topography due to DLC coating were assessed using a confocal microscope. Coating adhesion was evaluated using the method VDI 3198. The specimens were characterized using X-ray diffraction (XRD), microhardness test and scanning electron microscopy (SEM). The coating was characterized using Raman spectroscopy (RS) and X-ray photoelectron spectroscopy (XPS). The results showed a soft multilayer coating consisting of a plasma nitrided layer for load support, a Si-rich interlayer to improve adhesion and an a-C:H top layer. DLC deposition reduced the roughness of the textured specimens. The coating resulted in relatively stable friction and good durability, with small damage and negligible wear even under dry sliding.
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Research context
OpenAlex topics: Diamond and Carbon-based Materials Research · Metal and Thin Film Mechanics · Lubricants and Their Additives
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Mechanical Engineering, Universidade do Estado de Santa Catarina, Joinville 89219-710, Brazil
Materials Laboratory (Labmat), Universidade Federal de Santa Catarina, Florianópolis 88040-900, Brazil
Laboratory of Tribology and Materials, Universidade Federal de Uberlandia, Uberlândia 38408-100, Brazil
School of Engineering, Universidade Federal do Rio Grande, Rio Grande 96203-900, Brazil
Funding
Capes · CNPq
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Show source-provided references
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