Tribological properties of a liquid nitrocarburised special purpose cold work tool steel

Pantazopoulos, G.; Psyllaki, P.; Kanakis, D.; Αντωνίου, Σταμάτης; Papadimitriou, K.; Sideris, J.

doi:10.1016/j.surfcoat.2005.09.001

Cited by 19 publications

(9 citation statements)

References 11 publications

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“…Indeed, increasing normal load leads to a decrease in the friction coefficient. This result is in agreement with some studies 13,14 but it is in disagreement with other ones. 15,16 Increasing sliding speed (oscillation frequency) leads to a reduction in the value of the friction coefficient.…”

Section: Resultssupporting

confidence: 90%

Friction and wear behaviour of induction hardened ISO 42CrMo4 low-alloy steel under reciprocating sliding conditions

Autay

Kchaou

Dammak

2014

Proceedings of the Institution of Mechanical Engineers, Part J:

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Tribological behaviour of induction hardened ISO 42CrMo4 low alloy steel was evaluated under unlubricated sliding conditions. The effect of hardening depth and test conditions on the friction and wear properties was investigated. The tribological tests were carried out on a reciprocating tribometer. Cylinder-on-flat contact configuration was adopted. The results showed that varying the hardened depth, normal load or sliding speed influences the friction coefficient, the friction energy, the wear volume and the wear coefficient. It was found, also, that a change in the wear behaviour occurs when a critical value of normal load is exceeded.

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Section: Resultssupporting

confidence: 90%

Friction and wear behaviour of induction hardened ISO 42CrMo4 low-alloy steel under reciprocating sliding conditions

Autay

Kchaou

Dammak

2014

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…Figures 5(d-j) shows a different microstructure with respect to the above samples as plasma power increases from 400 W to 550 W. This microstructure is finer and finer in scale, as a result of the increased nitrogen solubility and diffusivity produced by the rf plasma process. This observation agrees with Pantazopoulos et al [9], in which they reported that the liquid nitrocarburised of cold work steel exhibits a very different microstructure with respect to native sample.…”

Section: Cross-section Analysis By Optical Microscopesupporting

confidence: 92%

Effect of Kind Rolling on the Properties of Plasma-Formed Nitride Layers on Fe93Ni4Ti3

El-Hossary¹,

Khalil²,

Kassem³

et al. 2010

JMP

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The nitriding behavior of cold rolled Fe 93 Ni 4 Ti 3 specimens was compared with that of hot rolled specimens of the same materials. Radio frequency (rf) nitriding was performed for 10 minutes in a 10 -2 mbar nitrogen atmosphere. The continuous plasma power was varied from 300-550 W in steps 50 W or less. Results of optical microscopy (OM), x-ray diffraction (XRD) and microhardness measurements (Hv) are presented and discussed with regard to the influence of kind rolling on the nitriding behavior, particularly nitride formation and nitride layer growth on mechanical properties. The results show a remarkable increase of nitrogen diffusivity and microhardness of cold rolled nitride samples. These best results may be attributed to enhancement of the defect and/or a compressive stress.

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“…It is well known that the influence of initial surface roughness on wear and friction coefficient of materials depend on initial surface roughness extent. [11] In the present work, www.interscience.wiley.com/journal/sia the amount and the size of debris have not been quantified but it is clear from literature that the production rate of debris and the size of particles due to wear are influenced by surface topography. [37] The formation of an oxide film on the nitrocarburized surface also leads to the redistribution of nitrogen and carbon in the outer part of the compound layer.…”

Section: Microhardness and Wear Mechanismsmentioning

confidence: 89%

Post‐oxidizing effects on surface characteristics of salt bath nitrocarburized AISI 02 tool steel type

Fares¹,

Chaoui²,

Coze³

2009

Surface & Interface Analysis

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The effect of post-oxidizing treatment on the characteristics of modified surface layers produced by salt bath nitrocarburizing on the industrial American Iron and Steel Institute (AISI) 02 tool steel types is investigated. Nitrocarburizing treatment is performed for 6 h and 8 h at 570• C and post-oxidizing treatment for 30, 60 and 90 min at 520 • C, using argon-steam mixture. Formed layers are characterized by their basic properties such as thickness layer, depth, surface hardness and wear resistance. Detailed estimation of the modified metal surface quality, in terms of chemical composition, formed phases, microstructures and diffusion mechanisms are performed by metallographic techniques, EDX, X-ray diffraction, scanning electron microscopy (SEM) and glow discharge optical electron spectroscopy (GDOES). The corrosion resistance was investigated in 0.4 M H 2 SO 4 solutions, using steady-state electrochemical polarization methods. The obtained results revealed the existence of a superficial oxide layer which consists of magnetite (Fe 3 O 4 ) and hematite (Fe 2 O 3 ) and the presence of an ε-phase associated with a small amount of γ -phase. Important improvements in wear, microhardness and corrosion resistance occur after these treatments and it is specifically concluded that the sole application of a nitrocarburizing treatment does not significantly ameliorate the corrosion resistance of the as-received steel. In fact, post-oxidation treatment contributes to increase corrosion resistance by forming a dense magnetite layer and at the same time, it partially covers the compound layer pores.

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Tribological properties of a liquid nitrocarburised special purpose cold work tool steel

Cited by 19 publications

References 11 publications

Friction and wear behaviour of induction hardened ISO 42CrMo4 low-alloy steel under reciprocating sliding conditions

Friction and wear behaviour of induction hardened ISO 42CrMo4 low-alloy steel under reciprocating sliding conditions

Effect of Kind Rolling on the Properties of Plasma-Formed Nitride Layers on Fe93Ni4Ti3

Post‐oxidizing effects on surface characteristics of salt bath nitrocarburized AISI 02 tool steel type

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