Plasma Nitriding of Steels

Aghajani, Hossein; Behrangi, Sahand

doi:10.1007/978-3-319-43068-3

Cited by 26 publications

(20 citation statements)

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“…If the nitrogen content of the layer is between 5.7 and 6.1 wt%, the γ ′ -nitride forms first, while the formation of ε-nitrides occurs at concentrations of from 7.7 to 11.1 wt%. 18 In terms of the wear performance of the as-nitrided material conditions, the existence of a CL has a negative effect on both the wear and friction behaviors due to its high brittleness and hardness. 17,19,20 Applied loads can lead to the failure of the CL, and the delaminated hard-layer particles that are subsequently present in the tribological system can further increase the wear volume.…”

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confidence: 99%

Sliding wear behavior of duplex coatings with different plasma nitride layers and a Cr‐Al‐Ti‐B‐N coating

Weinhold

Dalke

Schramm

et al. 2021

Engineering Reports

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The dry sliding wear behavior of AISI D2 tool steel is investigated under different heat treatment states in hardened, plasma nitrided, and duplex layer conditions. Plasma nitriding (PN) is performed at 510-520 • C with varying N 2 -H 2 gas mixtures, and Cr-Al-Ti-B-N layers are deposited at 480 • C by means of physical vapor deposition (PVD). This work investigates the influence of the nitride layer and, in particular, the presence of a compound layer on the tribological behavior of the duplex layer system. Therefore, as-nitrided conditions both without and with a compound layer -as well as with a mechanically removed compound layer -are subsequently hard coated. Comparative ball-on-disc wear tests in linear-reciprocating sliding motion against WC-Co counterbody balls are conducted at a load of 120 N. Compared to sample states without a compound layer, the as-nitrided states with a compound layer exhibit improved wear coefficients. In contrast, all duplex layer states exhibit comparably low friction coefficients and low wear coefficients independently of the presence of a compound layer.Removal of the compound layer prior to PVD coating leads to a significant reduction in wear resistance due to reduced surface roughness before the hard coating and the associated change in the bonding between the nitride layer and hard coating. K E Y W O R D Scompound layer, duplex surface engineering, friction and wear, plasma nitriding, PVD hard coating INTRODUCTIONTool steels are the preferred materials for most fields of application with demanding tribological working conditions -such as die casting, forging, stamping, cutting, and rolling. [1][2][3] One widely used representative of this group of steels is X155CrVMo12-1 (AISI D2), which is applied in complex applications involving, for example, high normal loads and sliding speeds. 4,5 In order to counteract the associated reduction in tool life, hard coatings produced by surface treatment techniques such as plasma nitriding (PN) and physical vapor deposition (PVD) hard coating are commonly applied. PN affords significant improvements in surface hardness, fatigue strength, corrosion, and wear resistance 3,4,6 compared to conventional steels. However, nitrided layers do not provide sufficient resistance in highly aggressive environments or under heavy mechanical stresses. [2][3][4]6,7 PVD hard coatings are mainly used because of their high hardness and excellentThis is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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confidence: 99%

Sliding wear behavior of duplex coatings with different plasma nitride layers and a Cr‐Al‐Ti‐B‐N coating

Weinhold

Dalke

Schramm

et al. 2021

Engineering Reports

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“…Besides these advantages, certain shortcomings are also associated with this system: initial equipment costs are high, damage of samples due to certain factors, such as "edge effect" or "hollow cathode effect" [49][50][51][52][53]. The hollow cathode effect happens due to the short distance among samples to be processed, and as a result, the glow discharge on various samples is overlapped [54]. It causes cascading of current densities, and samples are overheated [54].…”

Section: Direct Current Plasma Nitridingmentioning

confidence: 99%

“…The hollow cathode effect happens due to the short distance among samples to be processed, and as a result, the glow discharge on various samples is overlapped [54]. It causes cascading of current densities, and samples are overheated [54]. In the edge effect, the electric field at the edges is not uniform; thus, nitriding is not uniform at the edges as compared to other parts of the sample.…”

Section: Direct Current Plasma Nitridingmentioning

confidence: 99%

“…This technique exhibits specific pros and cons as compared to previous deposition techniques: the leading advantage of this technique is correlated with the indirect sputtering from the mesh due to ions bombardment, rather than sputtering from samples to be treated. As a result, the arcing damage from the surface of the sample can be avoided, removal of edge effect/hollow cathode effect and uniform and homogenous layer deposition [54]. Furthermore, it is better than PVD and CVD techniques because of low processing costs, simple equipment, rough vacuum requirements, high deposition efficiency, and low processing temperature [1].…”

Section: Cathodic Cage Plasma Depositionmentioning

confidence: 99%

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Synthesis of TiN and TiO2 thin films by cathodic cage plasma deposition: a brief review

Abreu

Naeem

Borges

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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The cathodic cage plasma deposition (CCPD) is an advanced technique recently developed from an active screen plasma nitriding system, which has been used for thin film deposition such as titanium nitride and titanium dioxide (TiO 2). These coatings can improve the physical, mechanical, and optical properties of numerous materials, and such coatings can be developed by several techniques. Unfortunately, the conventional deposition techniques exhibit certain drawbacks, including high cost, the complexity of the operation, very low pressure, and high processing temperature; as a result, CCPD is an advantageous technique. In this review, brief information on the deposition of titanium nitride and oxide coatings on steel alloys, titanium, glass, and silicon substrates, and the effect of control parameters on deposition efficiency is provided. The effectiveness of this system for the synthesis of thin films on various substrates, including insulators and conductors, is also summarized. The recent developments and applications of CCPD for titanium-based coatings are described in detail.

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“…The first one is the formation of a layer with nitrogen diffused into the metal forming dispersed nitrides of alloying elements, the so-called "diffusion zone". The other structure is composed of the diffusion zone and a surface layer of nitrides such as Fe 2 N, Fe 3 N and Fe 4 N called the composite layer and also known as the white layer [8,9].…”

Section: Introductionmentioning

confidence: 99%

Tribological evaluation of duplex treatment of plasma nitriding/ oxidation applied to injection mold extraction system

Reis¹,

Dotta²,

Farias³

et al. 2020

Tecnol. Metal. Mater. Min.

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This work analyzes the application of surface treatment of plasma nitriding with post-oxidation applied to injection mold extractor pins to reduce the injection cycle's interruptions for mold lubrication. For that, a device that simulates the operation of the injection mold extraction system was created. Wear was evaluated by mass loss and dimensional variation of the extraction pins and their bushings. The samples were characterized by microhardness and X-ray diffraction (XRD). The wear mechanisms were identified by scanning electron microscopy (SEM) and the coefficient of friction was analyzed employing a ball-on-plate tribological test. The results showed that the proposed system with plasma nitriding and postoxidation meets the requirements with a lubrication interval twice as long as the current system.

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Plasma Nitriding of Steels

Cited by 26 publications

References 0 publications

Sliding wear behavior of duplex coatings with different plasma nitride layers and a Cr‐Al‐Ti‐B‐N coating

Sliding wear behavior of duplex coatings with different plasma nitride layers and a Cr‐Al‐Ti‐B‐N coating

Synthesis of TiN and TiO2 thin films by cathodic cage plasma deposition: a brief review

Tribological evaluation of duplex treatment of plasma nitriding/ oxidation applied to injection mold extraction system

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