Effect of plasma nitriding on the surface properties of the chromium diffusion coating layer in iron-base alloys

Chang, Dong Yim; Lee, Sang Yul; Kang, Sung-Soon

doi:10.1016/s0257-8972(99)00234-0

Cited by 23 publications

(25 citation statements)

References 15 publications

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“…The Fig. 6 confirms the high concentration of nitrogen in the duplex-treated layer (Chang, Lee et al 1999).…”

Section: Scope Of This Papersupporting

confidence: 67%

“…It can be concluded that amount of carbon in the matrix greatly affects the thickness of the chromized layer. The thickness of the chromized layer in ASTM A213 with 0.15 wt% C was approximately of the order of 200-210 μm, slightly higher than that of AISI 1020 with approximately 0.2 wt% C (Chang, Lee et al 1999).…”

Section: Scope Of This Papermentioning

confidence: 80%

“…Cross-sectional SEM micrographs of chromized and plasma nitrided layer of (a, b) AISI 1020, (c, d) AISI H13, (e) ASTM A213 (Chang, Lee et al 1999).…”

Section: Figmentioning

confidence: 99%

“…The proper combinations of the first generation techniques can produce lots of duplex surface engineering methods. This is reflected very clearly in the literature, such as chromium pack diffusion and plasma nitriding (Chang, Lee et al 1999, Zeng, Yang et al 2012, plasma nitriding and plasma assisted PVD TiN coating (Van Stappen, Kerkhofs et al 1993, Ma, Li et al 2001, Panjan, Urankar et al 2002, Novák, Vojtěch et al 2006, Qi, Leng et al 2007, De Las Heras, Egidi et al 2008, plasma nitriding and aluminizing (Haftlang, Habibolahzadeh et al 2014), coated by Cr, Al, or Ni, and subsequently annealed in a furnace and finally irradiated by a high-current electron beam (Pogrebnjak and Shumakova 1999), pack cementation chromizing and boronizing (Lee, Kim et al 2004), plasma nitriding and post-oxidation (Mahboubi and Fattah 2005), nitriding treatment followed by carbon treatment (Mouri, Mabille et al 2001) and many more. The variation in the surface/duplex methods can also be introduced by changing the sequence of the processes such as chromizing of nitrided specimen ) and nitriding of chromized specimen .…”

Section: Introductionmentioning

confidence: 96%

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Duplex surface treatment of steels by nitriding and chromizing

Hakami

Pramanik

Basak

2015

Australian Journal of Mechanical Engineering

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Duplex surface treatment, that is, chromizing and plasma nitriding of steels have attracted interest from industrial sectors because of its attractive properties and ability to apply on different types of steels. This paper aims to investigate duplex treatment on different types of steels at different treatment conditions. The improvements of the treated surfaces in terms of morphology and thickness, composition, surface hardness and roughness, as well as wear and friction of the engineered layer on AISI 1045, AISI 1020, AISI 1020, H13, ASTM A213, AISI 52100 and AISI 8620 alloys have been analysed. It was found that several layers of different thickness are formed due to duplex treatment which depends on the carbon content of specimen and temperature of the treatment. Mainly carbides and nitrides of chromium and iron are formed which the amount and composition of them are controlled by duplex treatment process parameters. These compounds enhance the hardness and wear resistance of the treated surface. The CrxN phase is the main contributor towards high microhardness of duplex treated layers. In addition to high hardness, it also provides excellent wear resistance properties. The plasma nitriding process reduces the coefficient of friction of chromized steels due to the lower friction coefficient of chromium nitride. However, the surface roughness of the treated surface increases due to the intrinsic properties of formed phases.

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“…The Fig. 6 confirms the high concentration of nitrogen in the duplex-treated layer (Chang, Lee et al 1999).…”

Section: Scope Of This Papersupporting

confidence: 67%

Section: Scope Of This Papermentioning

confidence: 80%

“…Cross-sectional SEM micrographs of chromized and plasma nitrided layer of (a, b) AISI 1020, (c, d) AISI H13, (e) ASTM A213 (Chang, Lee et al 1999).…”

Section: Figmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

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Duplex surface treatment of steels by nitriding and chromizing

Hakami

Pramanik

Basak

2015

Australian Journal of Mechanical Engineering

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“…In previous studies, Cr 7 C 3 and Cr 23 C 6 -dominated layers obtained by TRD chromizing were plasma nitrided in gas mixtures of 25%N 2 + 75%H 2 and 50%N 2 + 50%H 2 at different conditions. It was observed that multi layers consisting of chromium nitrides and carbides exhibited better wear resistance than chromium carbides alone [7,[13][14][15]. The available literature does not report on the effect of plasma gas mixtures on TRD chromized steels, and is strictly devoted to the structure of chromium nitride layers produced by fixed gas mixtures.…”

Section: Introductionmentioning

confidence: 99%

Effect of N2+H2 gas mixtures in plasma nitriding on tribological properties of duplex surface treated steels

Taktak

Güneş

Ulker

et al. 2008

Materials Characterization

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Thermo-reactive diffusion chromizing followed by pulsed plasma nitriding were carried out on AISI 52100 and 8620 bearing steels. The chromized samples were pulse-plasma nitrided for 5 h at 500°C in various N 2-H 2 gas mixtures. The coated steels were characterized using scanning electron microscopy, X-ray diffraction and microhardness testing. The unlubricated wear behaviors of only chromized and duplex treated steels were investigated in ball-on-disc system tests at room temperature. X-ray diffraction patterns of the duplex treated samples containing H 2 indicated the formation of dominant CrN and Cr 2 N nitrides as well as the formation of Cr 3 C 2 and Cr 7 C 3 carbides. Gas mixtures in the plasma nitriding, which was performed after chromizing, have a significant influence on the wear rate of the duplex treated steels. The wear and friction tests showed that the lowest friction coefficient and wear rates were observed for the samples duplex treated in a 50%N 2 + 50%H 2 plasma. Conversely, the lowest wear resistance was observed on the samples duplex treated in a gas mixture of 75%N 2 + 25%H 2 , probably due to formation of a hard and brittle layer.

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High‐temperature corrosion of aluminized and chromized Fe‐10.4%Cr steels in N₂/H₂S/H₂O‐mixed gas

Kim

Lee

2016

Materials & Corrosion

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Fe‐10.4Cr‐0.8Mn‐0.2Si‐0.1C (at%) steel was either chromized or aluminized via pack cementation, and corroded at 800 °C for up to 100 h in 1 atm of (N2/3.1%H2O/2.42%H2S)‐mixed gas. The corrosion of the chromized coating resulted in the formation of an outer Cr2S3 and an inner Cr2O3 scale. Later, an FeS scale formed over the preformed Cr2S3/Cr2O3 scale. The corrosion of the aluminized coating led to the formation of the thin α‐Al2O3 scale. At the later stage of corrosion, discrete nodules that consisted mostly of Al2O3 and Al2S3 formed locally. Aluminizing was more effective than chromizing in increasing the corrosion resistance of the steel, due mainly to the formation of α‐Al2O3.

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Effect of plasma nitriding on the surface properties of the chromium diffusion coating layer in iron-base alloys

Cited by 23 publications

References 15 publications

Duplex surface treatment of steels by nitriding and chromizing

Duplex surface treatment of steels by nitriding and chromizing

Effect of N2+H2 gas mixtures in plasma nitriding on tribological properties of duplex surface treated steels

High‐temperature corrosion of aluminized and chromized Fe‐10.4%Cr steels in N₂/H₂S/H₂O‐mixed gas

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Effect of plasma nitriding on the surface properties of the chromium diffusion coating layer in iron-base alloys

Cited by 23 publications

References 15 publications

Duplex surface treatment of steels by nitriding and chromizing

Duplex surface treatment of steels by nitriding and chromizing

Effect of N2+H2 gas mixtures in plasma nitriding on tribological properties of duplex surface treated steels

High‐temperature corrosion of aluminized and chromized Fe‐10.4%Cr steels in N2/H2S/H2O‐mixed gas

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High‐temperature corrosion of aluminized and chromized Fe‐10.4%Cr steels in N₂/H₂S/H₂O‐mixed gas