The Law of Growth of Nitrided Layer in 31CrMoV9 Steel

Syla, Naim; Aliaj, Fisnik; DalipiBashkim,

doi:10.12693/aphyspola.130.83

Cited by 16 publications

(13 citation statements)

References 6 publications

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“…The thickness and the composition of the surface layer, that develops during the siliconizing process, are affected by the type of the chemical reactions occurring at the sample surface, by the diffusivity of silicon in the treated material, by the process temperature and the time [9]. Thickness of silicide layer as a function of siliconizing time was measured by SEM and is given in Fig.…”

Section: Resultsmentioning

confidence: 99%

Pack Siliconizing of Ti6Al4V Alloy

et al. 2017

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In this study, it was aimed to produce titanium silicide layer on Ti6Al4V by a simple, cheap and efficient method of pack siliconizing. Siliconizing was performed in a pack containing a mixture composed of SiO2 powder as siliconizing source, pure Al powder as a reducer for siliconizing, NH4Cl as an activator and Al2O3 powder as filler, at 1000• C for 8, 10 and 12 hours in open atmospheric furnace. Optical microscope and SEM-EDS studies indicate that the morphology of silicide layers has smooth, dense and layered nature. The presence of phases, confirmed by XRD analyses, reveals that the silicide layers formed at 1000• C are composed of TiSi2, Ti3Si5, TiN, TiO2 and SiO2 compounds. Silicide layer thickness was increased with increasing process time and ranged from 7.5 to 9.0 µm. Hardness of silicide layers, measured by Vickers indentation, is over 2100 HV.

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Section: Resultsmentioning

confidence: 99%

Pack Siliconizing of Ti6Al4V Alloy

et al. 2017

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“…Gas nitriding is a thermochemical process of surface hardening on ferrous materials [1,2]. This process is used to improve some surface properties such as wear, fatigue, corrosion, friction, and hardness [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…This process is used to improve some surface properties such as wear, fatigue, corrosion, friction, and hardness [1][2][3][4]. This case involves atomic nitrogen from dissociating ammonia gas diffusing into the steel surface in the temperature range 500…”

Section: Introductionmentioning

confidence: 99%

Hardness Curves for 31CrMoV9 Steel after Gas Nitriding

2017

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This work is an experimental study of the hardness curve in the zone of diffusion for the gas nitriding process of 31CrMoV9 steel. 12 samples were subjected to gas nitriding at three different temperatures -510• C, 550• C, and 590• C -and for each temperature four different nitriding times were used. Hardness was measured with an automatic microhardness tester PCE from LECO with a load of HV0.1 (0.9807N), and the distance between the points was 50 µm. It was found that the hardness of the diffusion layer changed from 602 HV to 787 HV. The maximum surface hardness was found at 510• C after nitriding for 16 h. Depending on the process parameters, the depth of the diffusion layer ranged from 270 µm to 700 µm. From the results we can draw conclusions for the gradient curve of nitriding parameters, and from each curve we can find the depth of the diffusion of nitrogen in steel.

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“…There are many thin and thick film production techniques, each with its own advantages and drawbacks [16][17][18][19][20]. Among these techniques, electrodeposition has advantages of non-vacuum fabrication, ability of production at room temperature, aqueous deposition, low cost, versatility etc.…”

Section: Introductionmentioning

confidence: 99%

A Cyclic Voltammetry Study on Electrodeposition of Cu-Zn Alloy Films: Effect of Ultrasonication Time

Yurdal

Karahan

2017

Acta Phys. Pol. A

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Copper zinc alloys were electrodeposited in the form of thin films. Electrodeposition process was carried out in non-cyanide aqueous medium, under constant current. Effect of pre-deposition ultrasonication of solution was investigated. In other words ultrasonic treatment was applied only before the electrodeposition. Solutions were subjected to high-energy ultrasonication for increasing times. Cyclic voltammetry was used to understand changes occurring due to duration of ultrasonication. No ultrasonication was applied during deposition. Atomic composition of resultant films were revealed by MP-AES. It was found that implementation of ultrasonic treatment before electrodeposition affects CV characteristics, when compared to non-ultrasonicated solution. Atomic composition of fabricated samples were found to be close to each other, some of them showing more deviation.

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The Law of Growth of Nitrided Layer in 31CrMoV9 Steel

Cited by 16 publications

References 6 publications

Pack Siliconizing of Ti6Al4V Alloy

Pack Siliconizing of Ti6Al4V Alloy

Hardness Curves for 31CrMoV9 Steel after Gas Nitriding

A Cyclic Voltammetry Study on Electrodeposition of Cu-Zn Alloy Films: Effect of Ultrasonication Time

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