Mechanical Properties and Wear Resistance of CrSiN Coating Fabricated by Magnetron Sputtering on W18Cr4V Steel

To increase the service life of tool materials and further meet the demands of modern high-speed machining, a Si-doping CrN coating consisting of Si3N4 amorphous and CrN nanocrystalline was fabricated on top of W18Cr4V high-speed steel. The effect of coating thickness on its structure and properties...

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Bibliographic Details
Published in:Coatings (Basel) 2023-05, Vol.13 (5), p.889
Main Authors: Cui, Changqing, Yang, Chunyan
Format: Article
Language:English
Subjects:
Abrasion
Coating effects
Coatings
Compressive properties
Crystal structure
Cutting tools
Deposition
Grain size
Hardness
High speed machining
High speed tool steels
Magnetic properties
Magnetron sputtering
Mechanical properties
Microscopy
Modulus of elasticity
Morphology
Nanoindenters
Oxidation
Protective coatings
Scratch tests
Service life
Silicon nitride
Substrates
Surface defects
Temperature
Thickness
Tool industry
Wear mechanisms
Wear resistance
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Summary:To increase the service life of tool materials and further meet the demands of modern high-speed machining, a Si-doping CrN coating consisting of Si3N4 amorphous and CrN nanocrystalline was fabricated on top of W18Cr4V high-speed steel. The effect of coating thickness on its structure and properties was investigated by means of X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), scratch test, nano-indenter, and friction–abrasion tester. The thickness of the coating was modulated by the deposition time. The results show that the coating consists of a CrN phase distributed into an amorphous Si3N4 matrix. As the thickness increased, the surface defects decreased, and the residual compressive stress, hardness, and elastic modulus as well as the H/E and H3/E2 factors increased, improving the wear resistance significantly. The adhesion between coating and substrate increased first and then decreased, and it reached the maximum when the coating thickness was 1.9 μm (deposition 60 min). Moreover, the effect of toughness on wear resistance and the wear mechanisms is discussed.
ISSN:2079-6412
2079-6412
DOI:10.3390/coatings13050889