Research on durability of AlCrN coated tungsten carbide (WC–Co) cutters during oak wood milling

Kazlauskas, Deividas; Jankauskas, Vytenis; Keturakis, Gintaras

doi:10.15544/balttrib.2019.38

Cited by 4 publications

(2 citation statements)

References 11 publications

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“…The TiCN coating structure is described in sources [30,31]. Hard PVD coatings are widely used in various industrial sectors, including to reduce tool wear [23][24][25][26][27][28][29], but the effect of tannic acids on these coatings has not yet been investigated.…”

Section: Methodsmentioning

confidence: 99%

Investigation of the Corrosion and Tribological Properties of WC-Co Tools Hardened with PVD Coatings in Solid Oak Wood Processing

Kazlauskas,

Jankauskas,

Antonov

2024

Coatings

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Corrosion and friction coefficient tests were performed on solid oak wood machined with hard-metal woodworking tools coated with PVD coatings (AlCrN, AlTiN, TiAlN, TiCN and CrN). The tannic acid attacks the carbide more intensively than the PVD coatings. During cutting, corrosion spreads on the cutting edge of the cutter due to mechanical action, which dissolves the cobalt binder of the hard-metal and causes the carbide grains to flake off. After 80 min of contact with the wood, the cobalt content decreases from 3.53 to 1.74%. Depending on the PVD coating material, cracks of 4 to 40 µm in width appear after 120 min (9000 m cutting path). After 120 min of machining, wear, corrosion effects and the influence of corrosion on the coefficients of friction were evaluated for tools with and without PVD coatings. TiCN is the most sensitive to corrosion, while AlCrN and CrN coatings are the least sensitive, with the AlTiN coating being the most affected under real cutting conditions (with mechanical + thermal + corrosion effects) and the tools with CrN and AlCrN coatings being the least affected. Corrosion affects the hard-metal and PVD coatings and reduces the coefficient of friction. The angle between the directions of sliding and sharpening of the cutting edge sharpening significantly influences this parameter. The coefficient of friction of hard-metal WC-Co and PVD coatings is higher in the parallel machining direction than in the perpendicular machining direction and ranges from 16.03% (WC-Co) to 44.8% (AlTiN). The coefficient of friction of hard-metal WC-Co decreases by 5.13% before and after exposure to tannic acid, while the corrosion of PVD coatings reduces it by 4.13% (CrN) to 26.7% (TiAlN).

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Section: Methodsmentioning

confidence: 99%

Investigation of the Corrosion and Tribological Properties of WC-Co Tools Hardened with PVD Coatings in Solid Oak Wood Processing

Kazlauskas,

Jankauskas,

Antonov

2024

Coatings

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“…There are several direct and indirect criteria, which facilitate determination and prediction of blade wear. This may be based on measurements of acoustic pressure (Aguilera et al 2016a), energy consumption during cutting (Atanasov and Kovatchev 2019), and quality of the obtained surface (Aguilera et al 2016b;Sedlecký 2017), but also through direct measurements of stereometry of the tool blade such as nose radius (Kazlauskas et al 2019), retreat of wedge corner due to wear (Aguilera et al 2016b), or wear area (Pinkowski et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Medium-density fibreboard milling using selected technological parameters

Pinkowski

Szymański

Piernik

et al. 2020

BioRes

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The aim of this study was to investigate the effect of blade type and sharpness angle on blade wear, cutting power, and surface roughness. The study was conducted on medium-density fibreboard (MDF) panels. Two blade types were analyzed (high-speed steel and cemented carbides) along with three variants of sharpness angles (40°, 45°, and 55°). Machining operations were performed on a spindle moulder at a feed rate of 6.3 m/min and rotational speed of 4500 min-1. The blade wear criterion was adopted as the loss of cutter surface area measured on the rake face. Roughness was determined using the Ra parameter, which was measured at three points on the cross-section of the MDF panel. A new, multifaceted approach to the study of cutting a narrow surface of the MDF board was used, thanks to which the interaction of such parameters as blade wear, cutting power, and machining quality as well as the type of material of the knives and their angular parameters were determined. An increase in blade wear and cutting power was recorded with an increase in cutting path, while roughness at the MDF panel cross-section varied. The cemented carbides cutter with the 45° angle may be proposed as optimal, because it showed a relatively low wear and cutting power while providing good quality of the milled surface.

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