nc-AlTiN/a-Si3N4 and nc-AlCrN/a-Si3N4 nanocomposite coatings as protection layer for PCBN tools in hard machining

Uhlmann, Eckart; Fuentes, Javier; Gerstenberger, Robert; Frank, H.

doi:10.1016/j.surfcoat.2013.09.017

Cited by 26 publications

(9 citation statements)

References 17 publications

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“…However, the finishing mill was chosen with TiN/TiAlN multi-layer coating with the aim of obtaining a balance between surface roughness and cutting temperature resistance [34]. Nevertheless, it must be taken into account that recently other PVD coatings based on nc-AlCrN/a-Si 3 N 4 , AlTiCrN with a nanocomposite top layer, TiAlCrN or AlTiCrSiYN/AlTiCrN with 55% of Al in the Si + Y layers were successfully tested for nickel based alloys machining [35][36][37][38].…”

Section: Experimental Setup and Tests Performancementioning

confidence: 99%

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Super Abrasive Machining of Integral Rotary Components Using Grinding Flank Tools

González

Calleja

Pereira

et al. 2018

Metals

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Manufacturing techniques that are applied to turbomachinery components represent a challenge in the aeronautic sector. These components require high resistant super-alloys in order to satisfy the extreme working conditions they have to support during their useful life. Besides, in the particular case of Integrally Bladed Rotors (IBR), usually present complex geometries that need to be roughed and finished by milling and grinding processes, respectively. In order to improve their manufacturing processes, Super Abrasive Machining (SAM) is presented as a solution because it combines the advantages of the use of grinding tools with milling feed rates. However, this innovative technique usually needed high tool rotary speed and pure cutting oils cooling. These issues implied that SAM technique was not feasible in conventional machining centers. In this work, these matters were tackled and the possibility of using SAM in these five-axis centers with emulsion coolants was achieved. To verify this approach, Inconel 718 single blades with non-ruled surfaces were manufactured with Flank-SAM technique and conventional milling process, analyzing cutting forces, surface roughness, and dimension accuracy in both cases. The results show that SAM implies a suitable, controllable, and predictable process to improve the manufacture of aeronautical critical components, such as IBR.

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Section: Experimental Setup and Tests Performancementioning

confidence: 99%

“…Tools characteristics, cutting conditions, and operation times are summarized in Table 2. nc-AlCrN/a-Si3N4, AlTiCrN with a nanocomposite top layer, TiAlCrN or AlTiCrSiYN/AlTiCrN with 55% of Al in the Si + Y layers were successfully tested for nickel based alloys machining [35][36][37][38].…”

Section: Experimental Setup and Tests Performancementioning

confidence: 99%

Super Abrasive Machining of Integral Rotary Components Using Grinding Flank Tools

González

Calleja

Pereira

et al. 2018

Metals

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“…It has been reported many times that quaternary AlCrSiN coatings exhibit better thermal stability of mechanical properties than typical TiAlN or CrAlN hard coatings [2][3][4]. According to many authors [3,[5][6][7][8][9][10][11]12], the formation of the nanocomposite structure is determined by thermodynamic spinodal segregation of two non-mixing phases driven by the lower total free energy of the system. Small amount of Si (a few at.%) tends to segregate along the grain boundaries forming an amorphous SiN x phase (matrix) in which individual AlCrN nanocrystalline grains are embedded [2,3,5,6,[13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Adhesive-deformation relationships and mechanical properties of nc-AlCrN/a-SiNx hard coatings deposited at different bias voltages

et al. 2018

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A series of Al-Cr-SiN hard coatings were deposited on WC-Co substrates with a negative substrate bias voltage ranging from-50 to-200 V using cathodic arc evaporation system. A Rockwell-C adhesion test demonstrated that excellent adhesion was observed at lower bias voltages of-50 V and-80 V, while further increases in bias voltage up to-200 V led to severe delamination and worsening of the overall adhesion strength. X-ray diffraction and transmission electron microscopy analysis revealed a single phase cubic B1-structure identified as an AlCrN solid solution with a nanocomposite microstructure where cubic AlCrN nanocrystals were embedded in a thin continuous amorphous SiNx matrix. Coatings exhibited a 002-texture evolution that was more pronounced at higher bias voltages (≥-120 V). Stress-induced cracks were observed inside the coatings at high bias voltages (≥-150 V), which resulted in stress relaxation and a decline in the overall residual stresses.

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“…There are many examples of successful application of duplex technology for increasing the wear resistance and lifetime of dies [7,9,[16][17][18]24]. These studies indicate positive results and significant improvements regarding forging die wear resistance and service life increase in comparison to the traditional heat-treated dies and other surface technologies, such as plasma nitriding, carbonitriding, gas nitriding and plasma spraying.…”

Section: Introductionmentioning

confidence: 99%

Failure analysis of forging die insert protected with diffusion layer and PVD coating

Podgrajšek

Glodež

Ren

2015

Surface and Coatings Technology

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nc-AlTiN/a-Si3N4 and nc-AlCrN/a-Si3N4 nanocomposite coatings as protection layer for PCBN tools in hard machining

Cited by 26 publications

References 17 publications

Super Abrasive Machining of Integral Rotary Components Using Grinding Flank Tools

Super Abrasive Machining of Integral Rotary Components Using Grinding Flank Tools

Adhesive-deformation relationships and mechanical properties of nc-AlCrN/a-SiNx hard coatings deposited at different bias voltages

Failure analysis of forging die insert protected with diffusion layer and PVD coating

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