Behaviour of PVD Coatings in the Turning of Austenitic Stainless Steels

Fernández-Abia, A.I.; Barreiro, J.; Fernández-Larrinoa, J.; Lacalle, Luís Norberto López de; Fernández-Valdivielso, A.; Pereira, Octavio

doi:10.1016/j.proeng.2013.08.241

Cited by 77 publications

(48 citation statements)

References 8 publications

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“…Thus, PVD coatings are usually used for finishing operations due to their overall thickness, these being thinner than their CVD counterpart. PVD is often used for applications requiring a better surface finish on the workpiece due to the sharp edges that this method confers on the tool [20].Coatings provide the tool with the properties that best fit the machining application, such as wear resistance, thermal dissipation or low friction coefficient. These coatings have different designs; this means they can have multiple layers that provide the cutting tool with enhanced properties, for Coatings 2020, 10, 235 3 of 26…”

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Recent Advances on Coated Milling Tool Technology—A Comprehensive Review

Sousa

Silva

2020

Coatings

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The milling process is one of the most used processes in the manufacturing industry. Milling, as a process, as evolved, with new machines and methods being employed, in order to obtain the best results consistently. Milling tools have also seen quite an evolution, from the uncoated high-speed steel tool, to the now vastly used, coated tools. Information on the use of these coated tools in recent scientific researches was collected. The coatings that are currently being researched are going to be presented, highlighting some novel advances in the nanocomposite and diamond coatings area, as these coatings are seeing a growing use in the industry, with very satisfactory results, with performance and tool-life increase. Wear mechanism of various types of coatings are also a popular topic on recent research, as the cutting behavior of these coated tools provides valuable information on the tool’s-life. Furthermore, analysis of these mechanisms enables for the selection of the best coating type for the correct application. Recently, the employment of coated tools paired with sustainable lubrication methods as seen some use. As this presents the opportunity to enhance the coated tool’s and the process’s performance, obtaining better results, in terms of better tool-life and better surface finish quality, in a more sustainable fashion.

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Recent Advances on Coated Milling Tool Technology—A Comprehensive Review

Sousa

Silva

2020

Coatings

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“…that are unavoidably introduced during the preparation of the coatings by the pack-cementation technique will negatively affect the surface roughness and application properties of the coatings, such as wear and corrosion resistance. Lower coating roughness, with a Ra value below 2 μm, is beneficial for performance [56]. Therefore, how to reduce or eliminate surface defects will become one of the problems that researchers need to solve.…”

Section: Friction-related Wear Behaviormentioning

confidence: 99%

Evolution of the Microstructure and Properties of Pre-Boronized Coatings During Pack-Cementation Chromizing

Zeng

Yang

et al. 2020

Coatings

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The effect of chromizing time on the microstructure and properties of B-Cr duplex-alloyed coating prepared by a two-step pack-cementation process was investigated. The phases, microstructure, and element distribution of three coatings obtained were characterized by X-ray diffraction (XRD), secondary electron imaging (SEI), backscattering electron imaging (BSEI), and energy dispersive spectroscopy (EDS), respectively. The results show that as the chromizing time increases, the net-like Fe2B and rod-like CrFeB phases in the coating gradually disappear, and finally completely transform into the block-like Cr2B and CrxCy (Cr7C3 and Cr23C6) phases. The growth kinetics analysis shows that interface reaction dominates the coating growth during the early stage of chromizing, while atomic diffusion gradually controls the coating growth at the later stage. The evolution mechanism of the B-Cr duplex-alloyed coating was also discussed.

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“…Low-pressure plasma spraying is the most widely used and successful process for the high coating performance especially for blade of aero-engine because of the shrouded Ar environment and relatively low working pressure. However, few studies focusing on interdiffusion between low-pressure plasma-sprayed MCrAlY coatings and single crystal superalloy was found, which is still insufficient to understand the mechanism of interdiffusion between Ni-based superalloy (especially the single crystal superalloys) and protective MCrAlY coatings [27][28][29][30].…”

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Interdiffusion Behaviour of NiCoCrAlY Coating and N5 Single Crystal Superalloy

et al. 2020

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This paper aims at investigating the microstructure and phases evolution of single crystal superalloy/high temperature protective coating during high temperature static oxidation, and exploring the influence of element interdiffusion behaviour on microstructure and phase evolution of the single crystal superalloy substrate. A NiCoCrAlY high-temperature protective coating was deposited on the Ni-based single-crystal superalloy by low-pressure plasma spraying technology. The coated samples were subjected to static oxidation for 200 h at a constant temperature of 1100 • C. Scanning electron microscope, energy dispersive spectrometer and X-ray diffraction were used to characterise the microstructure and phase after interdiffusion between the coating and the substrate at high temperature. The results showed that a dense thermally grown oxide layer was formed on the surface of the NiCoCrAlY coating after oxidation for over 100 h. The only interdiffusion zone was formed after oxidation for 50 h, while both interdiffusion zone and secondary reaction zone could be observed after oxidation for over 100 h. The thickness of interdiffusion zone and secondary reaction zone is increased with the extension of oxidation time, and the grain growth of topological close-packed phase in the secondary reaction zone is found. Al, Cr and Co in the coating diffuse from the coating to the substrate, while Ni and refractory materials like Ta, Mo, Re and W diffuse from the coating to the substrate. The interdiffusion of coating and substrate leads to the instability of γ/γ phase in the substrate, which finally results in the formation of W, Re and Cr-rich needle-like topological close-packed phase in the substrate.

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Behaviour of PVD Coatings in the Turning of Austenitic Stainless Steels

Cited by 77 publications

References 8 publications

Recent Advances on Coated Milling Tool Technology—A Comprehensive Review

Recent Advances on Coated Milling Tool Technology—A Comprehensive Review

Evolution of the Microstructure and Properties of Pre-Boronized Coatings During Pack-Cementation Chromizing

Interdiffusion Behaviour of NiCoCrAlY Coating and N5 Single Crystal Superalloy

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