Improvement of corrosion and wear resistances of AISI 420 martensitic stainless steel using plasma nitriding at low temperature

Xi, Yuntao; Liu, Daoxin; Han, Dong

doi:10.1016/j.surfcoat.2007.09.036

Cited by 214 publications

(117 citation statements)

References 9 publications

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“…Se puede apreciar que la presencia del recubrimiento reduce el coeficiente de fricción notablemente con respecto a la muestra nitrurada y patrón. Esto se debe a que se forma una capa de características grafíticas que tiene un efecto lubricante, como se ha reportado previamente en la literatura [8,9,19]. En cuanto al volumen desgastado, la profundidad máxima de la huella de desgaste en las muestras recubierta y dúplex resultó un orden de magnitud menor que en la muestra nitrurada.…”

Section: Propiedades Mecánicasunclassified

Protección de acero para instrumentos quirúrgicos con recubrimientos duros en base carbono tipo DLC

et al. 2018

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RESUMENLos aceros inoxidables martensíticos como el AISI 420 tienen múltiples aplicaciones, entre ellas instrumentos quirúrgicos, donde se requiere buena resistencia al desgaste y a la corrosión. Los tratamientos de modificación superficial, como la nitruración iónica, permiten mejorar las propiedades mecánicas de estos aceros pero afectan su resistencia a la corrosión. Por esta razón, un tratamiento posterior de deposición de recubrimiento tipo DLC ("Diamond Like Carbon", carbono símil diamante) puede ser conveniente. En este trabajo se estudió el comportamiento al desgaste y a la corrosión de muestras dúplex (nitruradas y recubiertas por PACVD) y se compararon con muestras nitruradas, sólo recubiertas, nitruradas y sólo templadas y revenidas. Se analizaron los recubrimientos con espectroscopia Raman y EDS. Se realizaron ensayos de desgaste tipo "pin on disk" y se evaluó la adhesión mediante ensayos de Scratch Test e indentación Rockwell C. Se midió nanodureza con indentador Berkovich. Se llevaron a cabo los ensayos propuestos para instrumentos quirúrgi-cos en la Norma F 1089-02 (prueba de agua hirviendo y de hisopado con sulfato de cobre) y ensayos de niebla salina.Estos recubrimientos tienen una relación I D /I G de 0,8 y bajo contenido de hidrógeno aproximadamente del 20 %. El espesor de los recubrimientos fue de 2 µm y la dureza alcanzó 24 GPa. La capa nitrurada tuvo un espesor de 10 µm. Las muestras dúplex y recubierta presentaron bajo coeficiente de fricción y el volumen desgastado fue indetectable. Además, tuvieron buen comportamiento a la corrosión en el ensayo de niebla salina y en los ensayos propuestos en la Norma ASTM F 1089-02. No obstante, la muestra sólo nitrurada presentó una región corroída en el ensayo de sulfato de cobre y en el de agua hirviendo. La muestra dúplex presentó mejor adhesión que la muestra sólo recubierta en los ensayos de Scratch Test y de indentación Rockwell C. Palabrasclave: DLC coatings, AISI 420, desgaste, corrosión, instrumentos quirúrgicos ABSTRACT Martensitic stainless steels can be used in different applications such as surgical instruments where a good wear and corrosion resistance are required. Surface modification treatments such as nitriding improve the mechanical properties of these steels, however; they affect the corrosion resistance. For this reason, the DLC (Diamond Like Carbon) coatings deposition can be convenient.The wear and corrosion behaviour was studied in duplex samples (nitrided and PACVD coated) and they were compared with nitrided and only coated samples and with those without treatment, only heat treated (quench and tempering). The coatings were analyzed by Raman spectroscopy and EDS. Pin on disk tests were performed and the adhesion was evaluated using Scratch Test and Rockwell C Indentation. The nanohardness was measured with a Berkovich indenter. The corrosion tests for surgical instruments (according to the Standard ASTM F 1089 -02) and Spray Salt Fog tests were carried out.In the DLC coatings, the I D /I G ratio was 0.8 and the hydrogen conten...

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Section: Propiedades Mecánicasunclassified

Protección de acero para instrumentos quirúrgicos con recubrimientos duros en base carbono tipo DLC

et al. 2018

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“…The increased corrosion and wear resistance observed for lowtemperature plasma treatments of stainless steels is attributed to metastable phases formation on the treated surface [5]. In the case of low temperature plasma nitriding application on martensitic stainless steels, the nitrogen incorporation leads to the formation of nitrogen expanded martensite phase ('N), which presents high wear [6,7], corrosion [7][8][9], and fatigue resistance [10]. For low-temperature plasma carburizing of martensitic stainless steel, the carbon introduction on the steel surface promotes the formation of carbon expanded martensite phase ('C) [11][12][13], whose tribological properties and corrosion resistance remain undetermined.…”

Section: Introductionmentioning

confidence: 99%

Micro-Abrasive Wear Behaviour of Low-Temperature Plasma Carburized Aisi 420 Martensitic Stainless Steel

Scheuer¹,

Cardoso²,

Neves³

et al. 2017

Anais Do Congresso Anual Da ABM

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Experiments were carried out aiming to study the influence of micro-abrasive wear test variables and plasma treatment parameters, on the tribological characteristics of low-temperature plasma carburized AISI 420 steel. The first part of this study was conducted in order to evaluate the influence of abrasive particle size, normal load and counter body rotation speed on carburized sample wear behavior; and the second part was conducted in order to evaluate the treatment temperature and time effect on carburized samples wear behavior. Plasma carburizing treatments were performed at 8 and 12 h, for temperatures ranging from 350 to 500°C; and at constant temperatures of 400°C for times between 12 to 48h, and for 450°C for times of 4 to 16h. Micro-abrasive wear test were performed by mean of a calowear ballcratering equipment using a polished ball of AISI 52100 steel rotating at 80, 120 and 160 rpm, for sliding distances from 2.6 to 104.2 m. Alumina abrasive particles with sizes of 0.05, 0.3 and 1.0 m were employed. The normal loads applied on this study were 0.1, 0.3 and 0.5 N. Carburized sample was characterized by mean of OM, XRD and hardness measurements. Worn crater characteristics were evaluated by confocal laser microscopy. Results showed that the transient wear regime prevails along the outer layer length (composed by Fe3C and 'C), and the steady-state wear stabilizes in the diffusion layer region (composed by 'C). It was verified that the wear rate and wear coefficient decreases with treatment temperature in the range of 350-450°C and increase for 500°C. It was also verified that the wear rate and wear coefficient decreases with treatment time in the range of 12-36 h (for 400°C cycle) and 4-12 h (for 450°C cycle), and increase for larger treatment times due the chromium carbide precipitation. It was also found that the wear coefficient increases with the increase of abrasive particle size, and decrease with the increase in counter body rotation speed and normal load. Lastly, the analysis of the worn craters indicates the occurrence of grooving and micro-rolling abrasion wear mechanisms.

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“…Nitriding reaction is of great industrial interest due to its influence on the surface hardness as well as wear and abrasive resistance of the nitrided surface [1][2][3][4][5][6][7][8][9][10]. Nitriding technology has been widely used also in improving material fatigue life, corrosion resistance and resistance of surface to softening effect.…”

Section: Introductionmentioning

confidence: 99%

FMR study of samples obtained by nitriding and nitrides reduction of nanocrystalline iron

Typek

Guskos

Żołnierkiewicz

et al. 2016

Materials Science-Poland

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Samples obtained by nitriding of promoted nanocrystalline iron and the nitrides reduction at various nitriding potential in terms of thermodynamic parameters were investigated by electron paramagnetic resonance/ferromagnetic resonance (EPR/FMR) method at room temperature. Experimental FMR spectra were fitted by the Dysonian-type resonance lines arising from the presence of different Fe-N phases. The obtained FMR parameters allowed us to identify the component phases and to determine their magnetic properties. In general, the proposed simple method of decomposition of the FMR spectra produced results on the phase content in investigated samples that were consistent with XRD measurements and additionally, magnetic characteristics of the studied nanomagnets.

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Improvement of corrosion and wear resistances of AISI 420 martensitic stainless steel using plasma nitriding at low temperature

Cited by 214 publications

References 9 publications

Protección de acero para instrumentos quirúrgicos con recubrimientos duros en base carbono tipo DLC

Protección de acero para instrumentos quirúrgicos con recubrimientos duros en base carbono tipo DLC

Micro-Abrasive Wear Behaviour of Low-Temperature Plasma Carburized Aisi 420 Martensitic Stainless Steel

FMR study of samples obtained by nitriding and nitrides reduction of nanocrystalline iron

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