Tribological assessment of the SiO2 coating deposited by sol–gel process toward cutting tool coating

• Published in: International journal of advanced manufacturing technology Vol. 126; no. 1-2; pp. 487 - 503
• Main Authors: Pereira, Natália Fernanda Santos, Reis, Bárbara Cristina Mendanha, Dos Santos, Anderson Júnior, Houmard, Manuel, Câmara, Marcelo Araújo, Rodrigues, Alessandro Roger, Rubio, Juan Carlos Campos
• Format: Journal Article
• Language: English
• Published: London Springer London 01-05-2023; Springer Nature B.V
• Subjects: Abrasive cutting; Abrasive machining; Abrasive wear; Advanced manufacturing technologies; Aqueous solutions; CAE) and Design; Coating; Coefficient of friction; Computer-Aided Engineering (CAD; Corrosion resistance; Cutting parameters; Cutting speed; Cutting tools; Cutting wear; Engineering; Friction; Galvanized steel; Glass substrates; High speed tool steels; High temperature; Industrial and Production Engineering; Mechanical Engineering; Media Management; Nodular graphitic structure; Original Article; Physical vapor deposition; Pin on disk tests; Process engineering; Protective coatings; Silicon dioxide; Sliding; Sol-gel processes; Stainless steel; Thin films; Titanium nitride; Tool wear; Tribology; Wear mechanisms; Workpieces; SiO; TiN; Cutting tool coating; Sol-gel process; Wear; Tribology
• ISSN: 0268-3768; 1433-3015
• DOI: 10.1007/s00170-023-11072-2

A more economic and thinner coating than the commercial ones was developed to improve the tribological behavior of high-speed steel (HSS) tools. This work focuses on performance of the SiO
2
coating was compared to uncoated HSS pins as well as coated ones (titanium nitride (TiN)) deposited by physical vapor deposition (PVD). The pin-on-disk test was carried out under a constant normal load of 10 N by applying sliding speeds of 40, 55, and 70 m·min
−1
. The lowest values of the friction coefficient (µ) and the specific wear coefficient (k) were found for the coated pins. SiO
2
coating presented performance equivalent to the commercial TiN coating for the sliding speeds of 40 and mainly 55 m·min
−1
, revealing a mild abrasive wear mechanism with the ferritic spheroidal graphite iron (SGI) interface surface. Thus, the sol-gel coating suggests being a promising protection for cutting tools submitted to abrasive wear when machining SGI workpiece at cutting speeds 3 times higher than those used with uncoated HSS tools, e.g., in drilling and tapping processes. Hereupon, SiO
2
is capable of substituting TiN coating for cutting speeds up to 55 m·min
−1
with advantage of being an easier deposition process applied to any geometry without needing of high temperatures.