Effect of low-temperature plasma carburizing on surface topography, mechanical and tribological properties of sintered iron and nitrided sintered iron

Lamim, Thiago de Souza; Anselmo, Letícia Maria; Bendo, Tatiana; Bernardelli, Euclides Alexandre; Binder, Cristiano; Klein, Aloı́sio Nelmo; Mello, José Daniel Biasoli de

doi:10.1016/j.triboint.2022.107452

Cited by 8 publications

(5 citation statements)

References 56 publications

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“…This shift towards more negative values is linked to the sealing surface porosity effect [8], which is believed to be a consequence of the grains uplifting from the plastic deformation during plasma nitriding. The sealing effect has been reported to improve the surface properties of sintered parts [79,80], which is assumed to apply in the present work, as evidenced by the enhanced hardness and scratching wear resistance of the nitrided samples.…”

Section: Surface Roughnessmentioning

confidence: 73%

“…The values of the Wp/Wt and H 3 /H 2 ratios of the samples are also shown in Figure 10. The H 3 /E 2 ratio indicates the resistance to plastic deformation that is also used to describe and rank the wear resistance of layers and coatings [79,84]. Figure 9 shows the average friction coefficient obtained from the instrumented scratch tests in constant load mode.…”

Section: Scratch Characterizationmentioning

confidence: 99%

“…The values of the Wp/Wt and H 3 /H 2 ratios of the samples are also shown in Figure 10. The H 3 /E 2 ratio indicates the resistance to plastic deformation that is also used to describe and rank the wear resistance of layers and coatings [79,84]. The quantitative scratch wear response is linked with the surface roughness values that are depicted in Figure 6.…”

Section: Scratch Characterizationmentioning

confidence: 99%

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Scratch Response of Hollow Cathode Radiofrequency Plasma-Nitrided and Sintered 316L Austenitic Stainless Steel

Broch,

Fontoura,

Lima

et al. 2024

Coatings

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Low-temperature plasma nitriding is a thermochemical surface treatment that promotes surface hardening and wear resistance enhancement without compromising the corrosion resistance of sintered austenitic stainless steels. Hollow cathode radiofrequency (RF) plasma nitriding was conducted to evaluate the influence of the working pressure and nitriding time on the microstructure and thickness of the nitrided layers. A group of samples of sintered 316L austenitic stainless steel were plasma-nitrided at 400 °C for 4 h, varying the working pressure from 160 to 25 Pa, and the other group was treated at the same temperature, varying the nitriding time (2 h and 4 h) while keeping the pressure at 25 Pa. A higher pressure resulted in a thinner, non-homogeneous nitrided layer with an edge effect. Regardless of the nitriding duration, the lowest pressure (25 Pa) promoted the formation of a homogenously nitrided layer composed of nitrogen-expanded austenite that was free of iron or chromium nitride and harder and more scratching-wear-resistant than the soft steel substrate.

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Section: Surface Roughnessmentioning

confidence: 73%

Section: Scratch Characterizationmentioning

confidence: 99%

“…The values of the Wp/Wt and H 3 /H 2 ratios of the samples are also shown in Figure 10. The H 3 /E 2 ratio indicates the resistance to plastic deformation that is also used to describe and rank the wear resistance of layers and coatings [79,84]. The quantitative scratch wear response is linked with the surface roughness values that are depicted in Figure 6.…”

Section: Scratch Characterizationmentioning

confidence: 99%

See 1 more Smart Citation

Scratch Response of Hollow Cathode Radiofrequency Plasma-Nitrided and Sintered 316L Austenitic Stainless Steel

Broch,

Fontoura,

Lima

et al. 2024

Coatings

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show abstract

“…More recently, more fundamental aspects, such as the tribological behaviour of low-temperature plasma carburising on surface topography, mechanical and tribological properties of sintered and nitrided sintered iron [148] and the effect of using hollow cathode on the tribological behaviour of plasma nitrided layers [149,150] have been studied.…”

Section: Brazilian Tribology: Status Quomentioning

confidence: 99%

Brazilian Tribology: origin, status quo and future perspectives

de Mello,

Costa

2023

Surf. Topogr.: Metrol. Prop.

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This first regional issue published in STMP highlights the potential and importance of the research carried out in Latin America regarding surface engineering and tribology. In order to celebrate this important initiative, a complete historical account of Brazilian tribology is presented for the first time. It initiates with the first steps of Brazilian tribology in the 1980s, followed by the evolution and expansion of tribology research both in academic centres and industry. Focus is given to two outstanding achievements of Brazilian tribology: the fully flexible engines that run at any proportion of ethanol and gasoline and a fully innovative, completely oil-less family of hermetic compressors. The status-quo of the current research groups on tribology is described. Finally, the future trends envisaged by the Brazilian tribology community are presented.

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“…Plasma carburizing the sintered iron surface effectively improved its mechanical properties. Moreover, the wear resistance was improved by approximately 45% [18].…”

Section: Introductionmentioning

confidence: 99%

Effect of Low-Temperature Plasma Carburization on Fretting Wear Behavior of AISI 316L Stainless Steel

Sun,

Li,

Cao

et al. 2024

Coatings

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AISI 316L stainless steel has received considerable attention as a common material for key ball valve components; however, its properties cannot be improved through traditional phase transformation, and fretting wears the contact interface between valve parts. A carburized layer was prepared on the surface of AISI 316L stainless steel by using double-glow low-temperature plasma carburization technology. This study reveals the effect of double-glow low-temperature plasma carburization technology on the fretting wear mechanism of AISI 316L steel under different normal loads and displacements. The fretting wear behavior and energy dissipation of the AISI 316L steel and the carburized layer were studied on an SRV-V fretting friction and wear machine with ball–plane contact. The wear mark morphology was analyzed by using scanning electron microscopy (SEM), the phase structure of the carburized layer was characterized with X-ray diffractometry (XRD), and the wear profile and wear volume were evaluated with laser confocal microscopy. The carburized layer contains a single Sc phase, a uniform and dense structure, and a metallurgically combined matrix. After plasma carburizing, the sample exhibited a maximum surface hardness of 897 ± 18 HV0.2, which is approximately four times higher than that of the matrix (273 ± 33 HV0.2). Moreover, the surface roughness was approximately doubled. The wear depth, wear rate, and frictional dissipation energy coefficient of the carburized layer were significantly reduced by up to approximately an order of magnitude compared with the matrix, while the wear resistance and fretting wear stability of the carburized layer were significantly improved. Under different load conditions, the wear mechanism of the AISI 316L steel changed from adhesive wear and abrasive wear to adhesive wear, fatigue delamination, and abrasive wear. Meanwhile, the wear mechanism of the carburized layer changed from adhesive wear to adhesive wear and fatigue delamination, accompanied by a furrowing effect. Under variable displacement conditions, both the AISI 316L steel and carburized layer mainly exhibited adhesive wear and fatigue peeling. Oxygen elements accumulated in the wear marks of the AISI 316L steel and carburized layer, indicating oxidative wear. The fretting wear properties of the AISI 316L steel and carburized layer were determined using the coupled competition between mechanical factors and thermochemical factors. Low-temperature plasma carburization technology improved the stability of the fretting wear process and changed the fretting regime of the AISI 316L steel and could be considered as anti-wearing coatings of ball valves.

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Effect of low-temperature plasma carburizing on surface topography, mechanical and tribological properties of sintered iron and nitrided sintered iron

Cited by 8 publications

References 56 publications

Scratch Response of Hollow Cathode Radiofrequency Plasma-Nitrided and Sintered 316L Austenitic Stainless Steel

Scratch Response of Hollow Cathode Radiofrequency Plasma-Nitrided and Sintered 316L Austenitic Stainless Steel

Brazilian Tribology: origin, status quo and future perspectives

Effect of Low-Temperature Plasma Carburization on Fretting Wear Behavior of AISI 316L Stainless Steel

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