Diffusion kinetics of different boronizing processes on martensitic stainless steel AISI 420

JUIJERM, P.

doi:10.4149/km_2014_4_231

Cited by 10 publications

(9 citation statements)

References 17 publications

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“…As it can be seen from optical micrographs, borided layer had smooth morphology and flat interface between layer and matrix. It was resulted from alloying elements of Cr, Ni due to high amount of Cr and Ni in the Mirrax steel matrix restricted the growing of borides layer [9,15,16,17]. These elements, especially Cr, also has higher dissolution ability in the layer according to iron matrix because of atomic number of Cr was lower than that of Fe and therefore, higher porosity can be seen towards surface of the borides layer.…”

Section: Optical Microstructurementioning

confidence: 99%

Electromagnetic Shielding Properties of Pack Borided MirraxTM Steel

Ibrahim

2021

Sakarya University Journal of Science

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In this study, it was aimed to investigate the electromagnetic interference shielding (EMI-SE) as well as some physical and mechanical properties of pack borided Mirrax tool steel. Boriding process was carried out at 900, 950 and 1000°C for 2, 5, 8h, respectively. Optical images showed that borides layer have smooth morphology and flat interface with matrix. XRD analysis revealed that main phases in the layer were FeB and Fe2B. Intensity of FeB phases increased with increment of process temperature and time. Depending on process time and temperature, the thickness of borides layer was ranged from 10 µm to 87.80 µm. Microhardness of layer was between 1700 and 2400 HV. EMI-SE measurements conducted within Ku band (12-20 GHz) indicated that EMI-SE efficiency increased by increasing of process time and temperature and it was ranged from 52dB to 75dB. It is possible to claim that borided Mirrax steel performed good EMI-SE and when boriding time reached to 5h, remarkable EMI-SE (electromagnetic interference shielding) (over 60dB) was observed on the samples borided at 900°C.

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Section: Optical Microstructurementioning

confidence: 99%

Electromagnetic Shielding Properties of Pack Borided MirraxTM Steel

Ibrahim

2021

Sakarya University Journal of Science

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“…Thus, there are many ways to improve the fatigue performance by modification or treatment of the surface regions, i.e., thermochemical or mechanical surface treatments. Some investigations of thermochemical surface treatments, e.g., carbonitriding or boronizing processes are reported and focused on the fatigue as well as kinetics [5][6][7][8]. Mechanical surface treatments, e.g.…”

Section: Introductionmentioning

confidence: 99%

Optimized fatigue performance of martensitic stainless steel AISI 440C using deep rolling integrated into hardening process

Donhongprai

Juijerm

2018

J min metall B Metall

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The deep rolling process can be modified by annealing at appropriate temperature and time to optimize the fatigue performance of metallic materials. The hardening process of the martensitic stainless steel AISI 440C composes of quenching and double tempering processes. We suggest to integrate the deep rolling process into the hardening treatment because the heat from the tempering process possibly provides sufficient static strain ageing effects. It was found that the deep rolling process can be integrated fully into the hardening process of the martensitic stainless steel AISI 440C, especially in the middle of the double tempering processes. The heat of the tempering process after the deep rolling process leads to beneficial static strain ageing effects as a consequence of greater fatigue lives. Moreover, the maximum fatigue life was detected in this research, when the optimized annealing had been performed instead of the second tempering process.

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“…A large SiC amount added prevents boron oxide formation and consumption because silicon oxide formation prevails over boron oxide formation. Potassium fluoroborate (KFB 4 ) is an activating agent to lower the temperature for boron thermochemical diffusion [73]. Common carbon steels or alloy steels may be suitable.…”

Section: Iron Boridesmentioning

confidence: 99%

Interlayers Applied to CVD Diamond Deposition on Steel Substrate: A Review

et al. 2017

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Academics and industry have sought after combining the exceptional properties of diamonds with the toughness of steel. Since the early 1990s several partial solutions have been found but chemical vapor deposition (CVD) diamond deposition on steel substrate continues to be a persistent problem. The main drawbacks are the high carbon diffusion from gas phase into substrate, the transition metals on the material surface that catalyze sp 2 bond formation, instead of sp 3 bonds, and the high thermal expansion coefficient (TEC) mismatch between diamond and steels. An intermediate layer has been found necessary to increase diamond adhesion. Literature has proposed many efficient intermediate layers as a diffusion barrier for both, carbon and iron, but most intermediate layers shown have not solved TEC mismatch. In this review, we briefly discuss the solutions that exclusively work as diffusion barrier and discuss in a broader way the ones that also solve, or may potentially solve, the TEC mismatch problem. We examine some multilayers, the iron borides, the chromium carbides, and vanadium carbides. We go through the most relevant results of the last two and a half decades, including recent advances in our group. Vanadium carbide looks promising since it has shown excellent diffusion barrier properties, its TEC is intermediary between diamond and steel and, it has been thickened to manage thermal stress relief. We also review a new deposition technique to set up intermediate layers: laser cladding. It is promising because of its versatility in mixing different materials and fusing and/or sintering them on a steel surface. We conclude by remarking on new perspectives.

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Diffusion kinetics of different boronizing processes on martensitic stainless steel AISI 420

Cited by 10 publications

References 17 publications

Electromagnetic Shielding Properties of Pack Borided MirraxTM Steel

Electromagnetic Shielding Properties of Pack Borided MirraxTM Steel

Optimized fatigue performance of martensitic stainless steel AISI 440C using deep rolling integrated into hardening process

Interlayers Applied to CVD Diamond Deposition on Steel Substrate: A Review

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