Strength and Deformation Properties of Low-Alloy Steel Bolts with Electroless Ni-P Coating: An Investigation of Two Thermal Routes

Correia, K. S.; Greca, Luiz G.; Sopchenski, Luciane; Soares, Paulo; Amorim, Fred L.; Torres, Ricardo

doi:10.1007/s11665-020-05066-4

Cited by 4 publications

(2 citation statements)

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“…The friction coefficient exhibits an unstable pattern, potentially attributed to the presence of the NiO layer (according to EDS results) formed due to exposure to the elevated temperature of 610 °C and the concurrent removal and redeposition of NiP. The reported thickness of the NiO layer formed during the interdiffusion heat treatment ranges between 0.5 and 1 µm [13]. Plow lines, indicative of a two-body wear mechanism, are observed in Figure 6b.…”

Section: Resultsmentioning

confidence: 89%

“…To address this issue, previous studies have proposed matching the IPHT and tempering temperature at 600 • C, along with a shorter duration of 2 to 4 h [13]. This approach has been shown to enable the NiP-coated AISI/SAE 4140 steel to meet the mechanical requirements of ASTM 320 L7, which specifies alloy steel and stainless-steel bolting for lowtemperature service.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical and Tribological Behavior of Nitrided AISI/SAE 4340 Steel Coated with NiP and AlCrN

Soares,

He,

DePaiva

et al. 2024

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In this study, novel surface engineering strategies to improve the wear performance of AISI 4340 were investigated. The strategies were as follows: (i) NiP deposition on a previously nitrided steel substrate, followed by NiP interdiffusion heat treatment at either 400 °C or 610 °C (referred to as duplex treatment); (ii) the deposition of AlCrN PVD coating on NiP layers on a previously nitrided steel substrate (referred to as triplex treatment). Prior to the deposition of AlCrN, the NiP was subjected to the interdiffusion heat treatment at either 400 °C or 610 °C. These strategies were compared with the performance of the AlCrN coating directly applied on nitrided steel. To characterize the microstructural features of each layer, X-ray diffraction (XRD) and scanning electron microscopy (SEM) coupled with energy-dispersive X-ray spectroscopy (EDS) analysis were conducted. We also carried out mechanical and tribological behavior assessments. The tribological tests were carried out using a ball-on-disc tribometer under a constant load of 20 N and a tangential speed of 25 cm/s; cemented carbide spheres with a diameter of 6 mm were the counterpart body. The friction coefficient was continuously monitored throughout the tests. The results reveal that the wear mechanism for the AlCrN coating is predominantly oxidative. The most wear-resistant surface architecture was the one comprising AlCrN over the NiP layer subjected to interdiffusion heat treatment at either 400 °C or 610 °C.

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Section: Resultsmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%