Plasma nitriding of the inner surface of stainless steel tubes

Braceras, I.; Ibáñez, Iñigo; Domínguez-Meister, Santiago; Sánchez-García, J.A.; Brizuela, Marta; Larrañaga, Aitor; Garmendia, Iñaki

doi:10.1016/j.surfcoat.2018.04.057

Cited by 29 publications

(12 citation statements)

References 15 publications

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“…EDS analysis in the cracked area of the ASPN samples ( Fig. 9b and e) shows a high content of oxygen indicating that the area was partially oxidized during the test, which is not unique (Ref [36][37][38][39]. In this case, wear debris were stuck in the center of the track.…”

Section: Resultsmentioning

confidence: 95%

Effects of Different Variants of Plasma Nitriding on the Properties of the Nitrided Layer

Kovács

Quintana

Dobránszky³

2019

J. of Materi Eng and Perform

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Several process variants of plasma nitriding can be distinguished depending on the location of the voltage introduction. The aim of this study is to compare three different variants of plasma nitriding (DC plasma nitriding, active screen plasma nitriding, and active screening process with bias voltage application) extended by the study of the coverage of active screen on C45E unalloyed steel, using two different N 2-H 2 gas mixtures. The thickness of the compound layer was measured using a scanning electron microscope, the phase analysis was performed by an x-ray diffractometer, and the nitrogen contents were analyzed by glow discharge optical electron spectroscopy. The results showed that the layer thickness and the surface hardness were higher by using active screen-biased plasma nitriding with high N 2 content gas mixture. Besides, the lid of the active screen did not influence significantly the chemical composition of the compound layer.

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Section: Resultsmentioning

confidence: 95%

Effects of Different Variants of Plasma Nitriding on the Properties of the Nitrided Layer

Kovács

Quintana

Dobránszky³

2019

J. of Materi Eng and Perform

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“…Površinska mikrotvrdoća neobrađenih i nitriranih uzoraka na 540[ºC] za različita vremena [61] Figure 5. Surface microhardness values of the samples untreated and nitrided at 540[ºC] for different times [61] Istražujući nitriranje unutrašnje površine cevi od nerđajućeg čelika AISI 316L, Braceras i grupa autora [66] uspostavili su vezu između parametara tretmana plazmom, geometrijskih karakteristika i otpornosti na koroziju. U cilju procene odgovora čelika AISI 316 na PN i na plazma nitridnooksidacionu obradu, u literaturi [67] je pokazano da tretman oksidacijom smanjuje otpornost na habanje PN uzorka pod velikim opterećenjima, ali pruža značajno poboljšanje (smanjenje) koeficijenta trenja nasuprot AISI 52100 čeličnom valjčiću i smanjenje hrapavosti površine.…”

Section: Plazma Nitriranje Austenitnih I Martenzitnih Nerđajućih čElikaunclassified

Directions of development and application of plasma nitriding in industry

Stojanović¹,

Stanisavljev²,

Erić³

2022

Zaštita materijala

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This paper presents a discussion of the results of previous research of the effects of surface modification of structural materials and tool steels using plasma nitriding (PN) in order to improve their mechanical, tribological and corrosion behavior. The paper discusses the current status and future directions in the application of PN on various wearing components that are exposed to high loads, stresses and frequent temperature changes. The paper provides an overview of the relevant literature whose results show the most favorable or optimal parameters of the PN process aimed at achieving the best performance in terms of wear and corrosion resistance and hardness increase for the various materials considered. Systematization of literature data about research of the impact of low-temperature PN on stainless steels has placed emphasis on those process mechanisms that achieve benefits for surface layers without creating negative side effects in the form of loss of corrosion resistance. The strengthening of hot forging dies is considered through the reasons and problems that cause the need for the application of PN, and then paper focuses on the role of PN in achieving the tribological properties required to extend the service life of the die. Publications in which the nitriding of titanium alloys is investigated through the reduction of wear, increase of bearing capacity and microhardness depending on the input parameters of the process, ie the optimal parameters applied in order to obtain the best performance characteristics are cited. The application of PN to aluminum and its alloys is discussed, as well as the conditions of testing and the achieved improvements.

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“…Optimized DLC coating, HiPIMS technology of positive pulses implemented by Santiago et al, has been maintained as a constant in the study. Meanwhile, three temperature conditions of the nitriding pretreatment have been explored to achieve greater adhesion of the resulting duplex coating [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Adhesion Enhancement on a Duplex DLC HiPIMS Positive Pulse Coating Performed by Active Screen Plasma Nitriding Pretreatment on 316L Stainless Steel Substrate

Gómez

García

Santiago³

et al. 2022

Advances in Materials Science and Engineering

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Diamond-like carbon (DLC) coatings have been the object of research interest due to properties such as excellent wear resistance, low coefficient of friction, high hardness, high elastic modulus, and biocompatibility. Despite this, DLC has poor adhesion properties, which makes it challenging to use in industrial applications. The application of DLC using the high-power pulse magnetron sputtering (HiPIMS) technique with positive pulses has been studied. Seeking greater DLC coating adherence, the application of a nitriding pretreatment prior to the DLC coating has been studied to improve its adhesion to AISI316L stainless steel soft metal substrates, employing active screen plasma nitriding (ASPN). The influence of the different pretreatment temperatures to reach the maximum levels of adhesion has been analyzed. Scratch methods have been employed to assess adhesion. The elemental composition, morphology, and roughness of the samples have been studied, as well as the behavior of resistance to wear and friction. The results show an improvement in DCL adhesion. Critical loads (LC3) increase at higher pretreatment temperatures, from 48 N for the DLC to 82 N for the ASPN + DLC. Pretreatment has also been shown to be effective in maintaining excellent dry wear resistance properties and a low coefficient of friction.

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Plasma nitriding of the inner surface of stainless steel tubes

Cited by 29 publications

References 15 publications

Effects of Different Variants of Plasma Nitriding on the Properties of the Nitrided Layer

Effects of Different Variants of Plasma Nitriding on the Properties of the Nitrided Layer

Directions of development and application of plasma nitriding in industry

Adhesion Enhancement on a Duplex DLC HiPIMS Positive Pulse Coating Performed by Active Screen Plasma Nitriding Pretreatment on 316L Stainless Steel Substrate

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