Effect of nature of nitride phases on sliding wear of plasma nitrided sintered iron

Binder, Cristiano; Bendo, Tatiana; Hammes, Gisele; Klein, Aloı́sio Nelmo; Mello, José Daniel Biasoli de

doi:10.1016/j.wear.2015.01.083

Cited by 31 publications

(16 citation statements)

References 54 publications

(68 reference statements)

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“…The phases and amount of these phases were very important to mechanical properties of surface. Because of this, these phases were very hard and increased hardness values of samples [8][9][10][11]. The variation of the parameters of heat treatment process and pulse plasma process resulted in different nitride layer characteristics; phase type, depth, hardness, hardness profile [10,11].…”

Section: Resultsmentioning

confidence: 99%

Effect of Heat Treatment and Pulse Plasma Process on Surface Properties of Steels

Özbek

2017

Acta Phys. Pol. A

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Section: Resultsmentioning

confidence: 99%

Effect of Heat Treatment and Pulse Plasma Process on Surface Properties of Steels

Özbek

2017

Acta Phys. Pol. A

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“…The pore content and the pore distribution and size also have an influence on the wear behavior. Depending on the wear load, sometimes γ'-layers show better wear properties and sometimes thin, slightly porous ε-compound layers [17][18][19].…”

Section: Of 12mentioning

confidence: 99%

Compound Layer Design for Deep Nitrided Gearings

Hoja

Steinbacher

Zoch

2020

Metals

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Deep nitriding is used to obtain a nitriding hardness depth beyond 0.6 mm. The long nitriding processes, which are necessary to reach the high nitriding hardness depths, mostly have a negative influence on the hardness and strength of the nitrided layer as well as on the bulk material. The compound layer often is considered less, because in most practical cases, it is removed mechanically after nitriding, to avoid spalling in service. However, in former investigations, it was shown, that thick and compact compound layers have the potential for high flank load capacity of gears. The investigations focus on the simultaneous formation of a high nitriding depth and a thick and compact compound layer. Beside the preservation of the strength, a challenge is to control the porosity of the compound layer, which should be as low as possible. The investigations were carried out using the common nitriding and heat treatable mild steel 31CrMoV9, which is often used for gear applications. The article gives an insight on the development of multistage nitriding processes studied by short- and long-term experiments aiming for a specific compound layer build-up with low porosity and high strength of the nitride layer and core material.

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“…Deposition techniques, such as physical vapor deposition (PVD) and chemical vapor deposition (CVD), are widely used in academic research. Furthermore, thermoreactive deposition (TRD) and plasma nitriding (PN) are more widely used for mass production to increase wear resistance [2][3][4][5]. In addition, studies on surface treatment using multicoating techniques [6][7][8][9][10] and multilayer formation have been conducted to improve bonding strength and wear resistance [11,12].…”

Section: Introductionmentioning

confidence: 99%

Multilayer-Forming Behavior of Cr Nitrides and Carbides for Thermoreactive Deposition

Park

Kim²,

Kim³

et al. 2018

Metals

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The effect of a nitride layer on the forming behavior of CrN and (Cr, Fe) 7 C 3 multilayers for thermoreactive deposition (TRD) was investigated. Plasma nitriding followed by TRD (PN-TRD) produced a larger coating thickness than the case of direct TRD with no plasma nitriding. For PN-TRD, an Fe 2-3 N layer of 10 µm in thickness was produced on AISI 52100 steels using plasma nitriding, followed by TRD using a mixed powder composed of 30 wt % Cr, 2 wt % NH 4 Cl, and 68 wt % Al 2 O 3 . During TRD at 800 • C, a CrN layer of 2 µm in thickness was formed along with a thin layer of mixed carbide (Cr 7 C 3 ) and nitride (CrN) on top. As the deposition temperature was increased to 950 • C, a new layer of Cr 7 C 3 was formed underneath the outermost layer composed of mixed Cr 7 C 3 and CrN. At 950 • C, a Cr-rich zone indicated a thickness of~7 µm. As the deposition time increased to 3 h at 950 • C, a new layer of (Cr, Fe) 7 C 3 was produced at the interface between the CrN formed at 800 • C and the base metal. This layer formed because of the abundant resources of Cr and C provided from the TRD powder and base metal, respectively. The multilayer and interface were concretely filled without the formation of voids as the TRD time increased to 6 h at 950 • C. The TRD process on a pre-nitrided layer was successfully applied to produce multilayers of CrN and Cr 7 C 3 .coating surface was deflected at the interface between the layers. However, PVD has the disadvantages of high cost and low adhesion compared to other coating technologies, such as CVD and TRD. CVD also has many process variables and a complicated device configuration. By contrast, TRD has the advantages of excellent bonding strength, simple equipment, and capability of mass production. TRD coating is performed in a heat treatment furnace at 800-1250 • C using carbonitride-forming powders, such as vanadium, niobium, tantalum, chromium, molybdenum, and tungsten. There are several process techniques incorporating salt baths, fluidized beds, and pack cementation [16]. In the surface treatment based on TRD, factors affecting the growth of the coating layer include temperature, time, powder composition, and base metal. The longer the time, the thicker the coating layer becomes, and the higher the temperature, the more the growth is promoted. The composition of the powder depends on the ratio of the mixed powders and the catalyst used [16][17][18][19][20][21]. To form a carbide, it is necessary for the base metal to contain at least 0.3 wt % C [18,22], and the carbide thickness becomes thicker as the C content increases [20,23]. Therefore, a multilayer having high hardness formed using TRD is more likely to be applied to the material that requires wear resistance, than that by PVD and CVD.In this study, we applied PN to increase the nitrogen content of the base material and a Cr-carbonitride multilayer with high hardness, corrosion, and wear resistance was formed on high-carbon steel through TRD coating [24,25]. In the TRD process, the integrity of the coating layer and ...

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Effect of nature of nitride phases on sliding wear of plasma nitrided sintered iron

Cited by 31 publications

References 54 publications

Effect of Heat Treatment and Pulse Plasma Process on Surface Properties of Steels

Effect of Heat Treatment and Pulse Plasma Process on Surface Properties of Steels

Compound Layer Design for Deep Nitrided Gearings

Multilayer-Forming Behavior of Cr Nitrides and Carbides for Thermoreactive Deposition

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