Evaluation Hard Layers in Steel AISI 8620

Perrusquia, N. López; Ruiz, M.A. Doñu; Suarez, Victor Cortes; Sanchez-Huitron, David; Vargas-Oliva, Yahir Edgar; De, I. J. Perez Montes

doi:10.4028/www.scientific.net/amr.690-693.2055

Cited by 4 publications

(1 citation statement)

References 7 publications

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“…In different boriding investigations it has been shown that the deposition of boron on the surface and the formation of a monolayer or bilayer of iron boride enhances materials properties; dependent on the technique of boriding and material study [7][8]. This type of technological advances and research provide the possibility of increasing the efficiency of treatment with boron by a different agent [9][10].…”

Section: Introductionmentioning

confidence: 99%

Study and Properties of a Steel Microalloyed Hardened Superficially

Perrusquia

Ruiz

Miguel

et al. 2015

DDF

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In this study, we present a boronizing treatment on a steel microalloy that was performed according to dehydrated paste-pack boriding. The temperatures conducted were at 1173, 1223 and 1273 K; at various exposure times of 1, 3, 6 and 9 h. As a result of the boriding process, diffusion-controlled growth of the FeB/Fe2B layers was obtained at the surface of the micro-alloy steel, and the kinetics of the growth process changed parabolically over time. The results of these examination properties of the boride layer as revealed by Optical Microscopy (OP) showed the morphology of the boride layer as a saw-tooth with a thickness ranging from 33 μm to 220 μm depending on the boronizing time. The analysis of Scanning Electron Microscopy (SEM-EDS); showed a distribution of the alloying elements that were detected by Energy Dispersive Spectrometry. The X-ray diffraction (XRD) technique indicated that the surface was a mixture of FeB and Fe2B borides. The evaluation of adhesion of the layers was determined by the technique of Rockwell-C hardness. Young’s modulus and hardness of the layer were evaluated by a nanoindentation technique with a load of 250 mN. The paste dehydrate boriding of micro-alloy reveal a change of properties on the surface; also the coatings FeB and Fe2B, to make a sacrificial function in the steels micro alloyed as widely used in pipelines transporting oil.

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Section: Introductionmentioning

confidence: 99%

Study and Properties of a Steel Microalloyed Hardened Superficially

Perrusquia

Ruiz

Miguel

et al. 2015

DDF

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Investigation on structural and tribological properties of borided gear steel after phase homogenization

Arslan

Sireli

et al. 2022

Surface and Coatings Technology

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Characterization of Boride Coatings on AISI 8620 Steels without and with Hydrogen Permeation

Ruiz

Bustos

Ramirez³

et al. 2022

Advances in Materials Science and Engineering

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The present work studied the characterization of boriding coatings without and with exposed hydrogen permeation on AISI 8620 through microstructure and mechanical behavior. A dehydrated paste pack process was carried out for the formation of boride coatings on AISI 8620 at 1173, 1223, and 1273 K for 6 h of exposure time for each temperature. After boronizing, hydrogen was introduced into the borided steels by in situ cathodic charging using an H2SO4 acid electrolyte. Specimens borided without and with hydrogen were characterized by scanning electron microscopy with energy dispersive spectroscopy and X-ray diffraction. The experimental techniques of the Vickers microhardness and three-point bending were used. As a result, the hydrogen diffusion on steel AISI 8620 borided shows a significant increase in microhardness. Furthermore, three-point bend tests showed an increased strength on 8620 steel borided. However, the ductility and strength value on 8620 steel borided surfaces presented a drastic reduction due to hydrogen permeation. The results revealed that the borided coatings provided strength and reduced the hydrogen embrittlement index on AISI 8620 borided.

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Evaluation Hard Layers in Steel AISI 8620

Cited by 4 publications

References 7 publications

Study and Properties of a Steel Microalloyed Hardened Superficially

Study and Properties of a Steel Microalloyed Hardened Superficially

Investigation on structural and tribological properties of borided gear steel after phase homogenization

Characterization of Boride Coatings on AISI 8620 Steels without and with Hydrogen Permeation

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