Effect of DC plasma nitriding temperature on microstructure and dry-sliding wear properties of 316L stainless steel

Nowadays, the improvement of ferrous materials performance is a problem of high interest. One of well-known wear-and corrosion properties improving technique is plasma nitriding, in which elemental nitrogen is introduced to the surface of a metal part for subsequent diffusion into the material. As a result, a compound, "white" layer and a diffusion zone are formed at the detail's surface. Most of the authors positively describe the effects of surface ion nitiding. On the other hand, there are also reports on adverse effects of direct current and pulsed direct current plasma nitriding on ferrous materials performance. Therefore, an attempt to provide comprehensive summary on direct current and pulsed direct current ion nitriding and its influence on ferrous materials' mechanical and corrosion properties has been made. According to the results, some of the technique drawbacks are hard to avoid in mass production.

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“…According to the literature (Tab. 1), in order to obtain a 5 µm nitride layer at least a 2 h lasting process must be applied (Li et al, 2008).…”

Section: General Informationmentioning

confidence: 99%

“…In research by Li et al (2008) the effect of DC plasma nitriding on dry-sliding wear properties of AISI 316L stainless steel has been evaluated. The ring-onblock dry wear test exhibited significant reduction of wear rate in comparison with unnitrided material.…”

Section: Wear and Fatiguementioning

confidence: 99%

Direct Current and Pulsed Direct Current Plasma Nitriding of Ferrous Materials a Critical Review

Łępicka

Grądzka-Dahlke

2016

Acta Mechanica Et Automatica

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“…Whereas the former can be applied to determine the nitriding induced surface hardening [31,[48][49][50][51] and the depth profile of hardness in the nitride cross-sections [51,52], the latter is also capable of measuring the elastic modulus [53,54]. Figure 3 shows the depth profiles of Knoop microhardness of plasma nitrided AISI 316 steel samples out of the authors' recent research.…”

Section: Structural Characterizations By Indentation Techniquesmentioning

confidence: 99%

From Micro to Nano Scales -Recent Progress in the Characterization of Nitrided Austenitic Stainless Steels

Luo¹

2015

Int J Nanomed Nanosurg

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In the frontier of materials science, understanding of materials has been in multiple scales from macro, micro, to atomic levels. This is attributed to the advanced instrumentations such as SEM, TEM, XPS, XRD, as well as several other spectroscopic and metallographic analyses. Fe-CrNi based austenitic stainless steels have a diverse range of modern applications ranging from biomedical prostheses in human bodies, food processing, to chemical engineering and nuclear power generation. The outstanding properties of the nitrided steels have attracted extensive research activities attempting to obtain a clear image on the structural characteristics of the structure, including nano-scale heterogeneity of the expanded austenite phase resulted from atomic-level chemical or electronic interactions in the alloying system. This paper provides a review on the structural characterization of nitrided austenitic stainless steels, with an emphasis on the latest experimental findings through the use of these sophisticated analytical tools. In the final section, several possible aspects of future studies are discussed.

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“…The structure of nitrided stainless steel depends strongly on the nitriding temperature. If sufficient atom diffusion mobility is provided at a relatively high process temperature, the nitrided layer comprises a multi-phase structure of chromium nitride (CrN and/or Cr2N), iron nitride, and the metallic ferrite phase [28][29][30] . Such a multi-phase structure possesses high hardness and excellent wear resistance, whereas the corrosion resistance is poor due to the preferential corrosion of the metallic phase.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nitriding Time on the Structural Evolution and Properties of Austenitic Stainless Steel Nitrided Using High Power Pulsed DC Glow Discharge Ar/N2 Plasma

Yang

Kitchen

Luo

et al. 2016

J. Coat. Sci. Technol.

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A high power pulsed DC glow discharge plasma (HPPGDP) system was employed to perform fast nitriding of AISI 316 austenitic stainless steel in Ar and N2 atmosphere. In-situ optical emission spectroscopy and Infrared pyrometer measurements were used during the plasma nitriding to investigate the effect of dynamic plasma on the nitriding behaviour. SEM and EDX, XRD, Knoop indentation, and tribo-tests were used to characterize microstructures and properties of the nitrided austenitic stainless steel samples.HPPGDP produced high ionization of both Ar and N2in the plasma that corresponded to dense ion bombardment on the biases steel samples to induce effective plasma surface heating and to form high nitrogen concentration on the biased steel surfaces, and therefore fast nitriding (> 10µm/hour) was achieved. Various phases were identified on the nitrided stainless steel samples formed from a predominantly a single phase of nitrogen supersaturated austenite toa multi-phase structure comprising chromium nitride, iron nitride and ferrite dependent on the nitriding time. All the nitrided AISI 316 austenitic stainless steel samples were evaluated with high hardness (up to 17.3 GPa) and exceptional wear resistance sliding to against hardened steel balls and tungsten carbide balls.

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Effect of DC plasma nitriding temperature on microstructure and dry-sliding wear properties of 316L stainless steel

Cited by 75 publications

References 23 publications

Direct Current and Pulsed Direct Current Plasma Nitriding of Ferrous Materials a Critical Review

Direct Current and Pulsed Direct Current Plasma Nitriding of Ferrous Materials a Critical Review

From Micro to Nano Scales -Recent Progress in the Characterization of Nitrided Austenitic Stainless Steels

Effect of Nitriding Time on the Structural Evolution and Properties of Austenitic Stainless Steel Nitrided Using High Power Pulsed DC Glow Discharge Ar/N2 Plasma

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