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Journal articles on the topic 'Solid boriding'

Author: Grafiati

Published: 4 June 2021

Last updated: 12 February 2022

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1

BICAN, OSMAN, SALIH UGUR BAYCA, SULE OCAK-ARAZ, BUNYAMIN YAMANEL, and NACI ARDA TANIS. "EFFECTS OF THE BORIDING PROCESS AND OF QUENCHING AND TEMPERING AFTER BORIDING ON THE MICROSTRUCTURE, HARDNESS AND WEAR OF AISI 5140 STEEL." Surface Review and Letters 27, no. 06 (2019): 1950157. http://dx.doi.org/10.1142/s0218625x19501579.

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An investigation was made on the effects of the boriding process and of quenching and tempering after boriding on the microstructure, hardness and wear of AISI 5140 steel. In this study, a new boriding agent (Baybora[Formula: see text]–1) developed for the solid boriding method was used. It was observed that the wear resistance of the borided samples increased by about four times, but the wear resistance of the sample subjected to quenching and tempering after boriding increased by only about two times. Thus, it was determined that quenching and tempering after boriding worsen wear resistance.

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2

Kaplan, Yavuz, Ahmet Cetin Can, and Arzum Ulukoy. "A new medium for boriding of Ti6Al4V alloy for biomedical applications." Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 233, no. 2 (2016): 109–19. http://dx.doi.org/10.1177/1464420716662801.

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This study presents a low-cost and environmentally friendly medium for the pack boriding (boronizing) of a Ti6Al4V alloy. Titanium and its alloys are known to be highly reactive and to have extreme oxygen affinity. Therefore, boriding is performed under vacuum or in protective atmospheric conditions. This work evaluated the pack boriding heat treatments of a Ti6Al4V alloy under atmospheric conditions via the various boriding media used by previous researchers. In addition, a new pack boriding medium was developed by adding aluminum. Consequently, this study demonstrated that it is possible to

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3

Li, Feng Hua, Xiao Hong Yi, Jing Lei Zhang, and Zhan Guo Fan. "Study on Rare Earth Catalysis in the Boriding Process to Titanium Alloy." Applied Mechanics and Materials 48-49 (February 2011): 1177–81. http://dx.doi.org/10.4028/www.scientific.net/amm.48-49.1177.

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Solid powder boriding experiment was carried out on TC4 titanium alloy surface with method of RE(rare earth)-boriding at the temperature of over 1000°C. By means of XRD, SEM and EDS, phase composition, microstructure and morphology of TC4 titanium alloy after RE-boriding were investigated. The effect of rare earth on phase composition was discussed. Results of the experiment showed that the diffusion layer was composed of top-layer TiB2 and sub-layer TiB whiskers with the highest thickness being 25μm. The XRD results revealed TiB-TiB2 biphasic B-Ti compounds layer formed on the surface of TC4

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4

CALIK, A., N. UCAR, A. KOCASLAN, and S. KARAKAS. "EFFECT OF INTERRUPTED BORIDING ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF 16MnCr5 STEELS." Surface Review and Letters 25, no. 07 (2018): 1950022. http://dx.doi.org/10.1142/s0218625x19500227.

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The microstructure, microhardness and tensile properties of continuously borided and interrupted borided 16MnCr5 steel were compared. In the continuous process, boriding was carried out continuously at 1273[Formula: see text]K for 16[Formula: see text]h. In the interrupted process, after 5[Formula: see text]h of boriding at 1273[Formula: see text]K, the crucible containing the specimens and the boriding powders was removed from the furnace and cooled to 873[Formula: see text]K in still air for 30[Formula: see text]min and this procedure was repeated three times. Both boriding treatments were a

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5

Kaplan, Yavuz, Mehmet Gülsün, and Sinan Aksöz. "Formation of boride layers on a commercially pure Ti surface produced via powder metallurgy." International Journal of Materials Research 112, no. 4 (2021): 303–7. http://dx.doi.org/10.1515/ijmr-2020-8163.

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Abstract In this study, powder metallurgy was applied in a furnace atmosphere to form titanium boride layers on a commercially pure Ti surface. Experiments were carried out using the solid-state boriding method at 900 °C and 1000°C for 12 h and 24 h. Samples were produced by pressing the commercially pure Ti powders under 870 MPa. The sintering process required by the powder metallurgy method was carried out simultaneously with the boriding process. Thus, the sintering and boriding were performed in one stage. The formation of the boride layer was investigated by field emission scanning electr

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6

Benhabib, B., O. Allaoui, and M. E. Djeghlal. "Boro-Nitriding of 25CrMo4, 42CrMo4 and 55CrMoV4 Low Alloy Steels." Advanced Science, Engineering and Medicine 12, no. 3 (2020): 371–75. http://dx.doi.org/10.1166/asem.2020.2533.

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In this work, we study the effect of boriding and nitriding treatments on microhardness and corrosion resistance of three different low alloy steels (25CrMo4, 42CrMo4 and 55CrMoV4). The thermochemical treatments were carried out in solid medium by the powder technique at 900 °C for 4 hours in boriding treatment, and at 550 °C for 12 hours in nitriding treatment. The obtained results show that the boride and nitride layers formed on the surface of treated steels contained FeB, Fe2B, CrN, Fe3N and Fe4N phases. Microhardness of boride and nitride layers are between 850 HV0.05 and 2100 HV0.05. Cor

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7

Bensalah, Benhabib, Allaoui Omar, and Djeghlal Mehammad Elamine. "Microstructure and Mechanical Properties of the 55CrMoV4 Steel Exposed to Boriding and Nitriding Treatments." Annales de Chimie - Science des Matériaux 45, no. 4 (2021): 291–95. http://dx.doi.org/10.18280/acsm.450404.

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In this study boriding and nitriding treatments were carried out on 55CrMoV4 low alloyed steel. The thermochemical treatments were carried out in solid medium by the powder technique at 900℃ for 4 hours for boriding treatment and at a temperature of 550℃ for 12 hours for nitriding treatment. The phases analysis of the boride and nitrite layers formed on the surface was carried out by optical microscopy (OM), and X-ray diffraction (XRD). The results of the surface analysis show that the boride and nitride layers a presence of FeB, Fe2B, CrN, Fe3N and Fe4N compounds. The thickness of boride laye

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8

Kara, Gökhan, Gencaga Purcek, and Harun Yanar. "Improvement of wear behaviour of titanium by boriding." Industrial Lubrication and Tribology 69, no. 1 (2017): 65–70. http://dx.doi.org/10.1108/ilt-11-2015-0174.

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Purpose The purpose of this paper is to achieve a hard and protective borided layer on commercially pure Ti (grade-2) by applying boriding, and to investigate the changes in its microstructure, hardness, friction and wear behaviors. Design/methodology/approach Pack boriding technique was used to form a hard boron diffusion layer on titanium substrate. A powder mixture of amorphous boron and anhydrous borax was used as a solid-state boriding media, and then the boriding was carried out under inert atmosphere. Findings A thick dual boride layer consisting of a monolithic titanium diboride (TiB2)

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9

Katasonov, Alexander, Vladimir Malikov, and Alexey Ishkov. "Chemical reactions at high-speed HFC-boriding." E3S Web of Conferences 135 (2019): 01067. http://dx.doi.org/10.1051/e3sconf/201913501067.

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Strengthening of parts and units of machines, increased reliability and longer service life is an important task of modern industry. As an promising materials for protective-strengthening coatings, offered matrix composites based on the ternary system Fe-B-FenB. The article is proposed the complex heating of steel being borated and imbued medium by high frequency currents (HFC), and to combine the diffusion boriding from liquid and solid media and the transition of the diffusion boriding to chemical interaction between the elements of Fe and B. We determined the main components of the reaction

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10

Ucar, Nazim, Sule Dogan, Mustafa Serdar Karakas, and Adnan Calik. "Boriding of Binary Ni–Ti Shape Memory Alloys." Zeitschrift für Naturforschung A 71, no. 11 (2016): 1017–20. http://dx.doi.org/10.1515/zna-2016-0289.

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AbstractBoriding of binary Ni–Ti shape memory alloys was carried out in a solid medium at 1273 K for 2, 4, 6, and 8 h using the powder pack method with proprietary Ekabor–Ni powders. Characterization of the boride layer formed on the surface of alloys was done by optical microscopy and scanning electron microscopy. The presence of boride, silicide, and borosilicide phases in the boride layers was confirmed by X-ray diffraction analysis. The thickness and microhardness of the boride layers increased with increasing boriding time. Hardness profiles showed a rapid decrease in hardness moving from

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11

Ucar, N., M. Yigit, and A. Calik. "Metallurgical Characterization and Kinetics of Borided 34CrNiMo6 Steel." Advances in Materials Science 20, no. 4 (2020): 38–48. http://dx.doi.org/10.2478/adms-2020-0021.

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Abstract Boriding of 34CrNiMo6 steel was performed in a solid medium consisting of Ekabor-II powders at 1123, 1173 and 1223 K for 2, 4 and 6 h. Morphological and kinetic examinations of the boride layers were carried out by optical microscopy, scanning electron microscopy (SEM) and X-ray diffraction (XRD). The thicknesses of the boride layers ranged from 22±2.3 to 145±4.1 depending on boriding temperature and time. The hardness of boride layer was about 1857 HV0.1 after boriding for 6 h at 1223 K, while the hardness of the substrate was only around 238 HV0.1. Growth rate constants were found t

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12

Urm, Kee Won, Sun Ho Lee, J. W. Lee, and E. Y. Lee. "The Effects of Surface Treatments on Solid Particle Erosion of 12Cr Steels for USC Power Plants." Solid State Phenomena 118 (December 2006): 201–8. http://dx.doi.org/10.4028/www.scientific.net/ssp.118.201.

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12Cr steels have been applied on the turbine bucket and nozzle partition materials for the ultra super critical (USC) coal-fired power plant. Turbine bucket and nozzle materials are damaged by the solid particles within USC steam conditions. Therefore, they have been protected by the surface treatments such as ion nitriding, boriding and chrome carbide high velocity oxygen fuel (HVOF) spray coating. In this study, the surface treatment effects on the solid particle erosion (SPE) characteristic of 12Cr steels were examined in the temperature range of 540 to 620°C and the mechanisms of surface d

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13

Allaoui, Omar, and Lakhdar Taleb. "Fatigue and Cyclic Behavior of 304L Stainless Steel in the Presence of Boriding Surface Treatment." Key Engineering Materials 703 (August 2016): 106–11. http://dx.doi.org/10.4028/www.scientific.net/kem.703.106.

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In this work, we will study the cyclic behavior (tension-compression under strain control) and the fatigue of 304L austenitic SS after application of a boriding thermochemical treatment. 304L specimens was borided in a solid medium at 900 °C for 4 hours. The phase analysis of boride layers formed at the surface was performed by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). The obtained results show that the layers formed on 304L steel contained the following boride phases FeB, Fe2B, CrB, Cr2B, NiB and Ni2B. The fatigue tests show th

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14

Ortiz-Domínguez, Martin, Mourad Keddam, Milton Elias-Espinosa, et al. "Characterization and boriding kinetics of AISI T1 steel." Metallurgical Research & Technology 116, no. 1 (2018): 102. http://dx.doi.org/10.1051/metal/2018081.

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The AISI T1 steel was hardened by the solid boriding process in the temperature range 1123–1273 K for a time duration of 2 to 8 h. A kinetic model, based on the integral method, was applied to the growth of a single boride layer (Fe2B) at the surface of AISI T1 steel. This diffusion model has been validated experimentally by considering two additional boriding conditions. A numerical solution was then obtained after solving the set of differential algebraic equations in order to compare the experimental thicknesses of Fe2B layers with the predicted values. The activation energy for boron diffu

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15

Sánchez, Enrique Hernández, I. P. Torres Avila, A. Chino-Ulloa, et al. "Tribological Behavior of a Self-Lubricant Surface Film of H₃BO₃Formed on a Borided Biomedical Steel by a Post-Treatment." Defect and Diffusion Forum 400 (March 2020): 65–74. http://dx.doi.org/10.4028/www.scientific.net/ddf.400.65.

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This paper evaluates the tribological behavior of borided AISI 316L steel after being exposed to a secondary process to form a thin film of a solid lubricant. The process known as Short Annealing Process (SAP), allows creating a thin film of boric acid (H3BO3) on the surface of metallic materials previously exposed to boriding. The H3BO3 film acts like solid lubricant due to its lamellar crystalline structure. First samples of AISI 316L were exposed to boriding to temperatures of 875, 925 and 975 °C during 2, 4 and 6 h each temperature. Then, samples were heated to 750 °C during 5 min and cool

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16

Shevchuk, E. P., V. A. Plotnikov, and G. S. Bektasova. "Boron Diffusion in Steel 20." Izvestiya of Altai State University, no. 1(111) (March 6, 2020): 58–62. http://dx.doi.org/10.14258/izvasu(2020)1-08.

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As is known, boriding is carried out to increase the wear resistance and corrosion resistance of iron-carbon alloys. Along with high hardness, borides, unfortunately, have very high fragility and high refractoriness. An effective way to counter the fragility of boride layers is to form a composite structure consisting of inclusions of solid borides in a more plastic matrix. Such coatings can be obtained by volumetric heating in a muffle furnace using a boron paste that besides a mixture of iron and boron powders contained ammonium hydroxide and activated carbon with or without liquid glass. Bo

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17

Ruiz-Trabolsi, Pablo A., Julio Cesar Velázquez, Carlos Orozco-Álvarez, et al. "Kinetics of the Boride Layers Obtained on AISI 1018 Steel by Considering the Amount of Matter Involved." Coatings 11, no. 2 (2021): 259. http://dx.doi.org/10.3390/coatings11020259.

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Boride layers are typically used to combat the wear and corrosion of metals. For this reason, to improve our knowledge of the boriding process, this research studied the effect of the size of the treated material on the kinetics of the growth of the boride layers obtained during a solid diffusion process. The purpose was to elucidate how the layers’ growth kinetics could be affected by the size of the samples since, as the amount of matter increases, the amount of energy necessary to make the process occur also increases. Furthermore, the level of activation energy seems to change as a functio

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18

Bayça, S. U., O. Bican, B. Yamanel, A. P. Hekimoğlu, and M. Çalış. "The Effect of Solid Boriding Time on the Structure, Hardness and Corrosion Properties of AISI 5140 Steel." Protection of Metals and Physical Chemistry of Surfaces 56, no. 3 (2020): 591–97. http://dx.doi.org/10.1134/s2070205120030065.

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19

Boubaaya, Rabah, Omar Allaoui, Younes Benarioua, and Mokhtar Djendel. "Microstructural and Mechanical Characterizations of Chromium Carbides and Chromium Borides Layers Over Low-Carbon Steel Surface." Advanced Science, Engineering and Medicine 12, no. 8 (2020): 1130–36. http://dx.doi.org/10.1166/asem.2020.2673.

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Hard coatings based on chromium carbides and chromium borides are widely used in applications that require mechanical performance, i.e., high hardness and low friction coefficient and good corrosion resistance. In this work, we made layers of chromium carbides and chromium borides on the surface of low carbon steel through some specific treatments. For chromium carbides, the cementation in a solid medium followed by electroplating of chromium on the surface and finally the application of annealing treatment at temperatures between 500 and 1100 °C for 1 hour. For chromium borides, the boriding

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20

Fu, Hui, Hui Li, Daqing Fang, Xuecheng Cai, and Qiuming Peng. "High ductility of a bi-modal Mg-7wt.%Y alloy at low temperature prepared by high pressure boriding and semi-solid extrusion." Materials & Design 92 (February 2016): 240–45. http://dx.doi.org/10.1016/j.matdes.2015.12.024.

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21

Kovalchuk, A. V., E. K. Patseko, G. A. Tkachenko, and N. A. Vereshchak. "Increase in the heat resistance of carbon steels by thermodiffusion treatment and vacuum coating application." Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY), no. 4 (December 16, 2020): 139–47. http://dx.doi.org/10.21122/1683-6065-2020-4-139-147.

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In this article is substantiated the hypothesis of the possibility of increasing the heat resistance of hypoeutectoid carbon steels by preliminary thermal diffusion alloying followed by the application of vacuum nitride coatings. It was established that thermal diffusion layers obtained as a result of saturation with boron and aluminum have the greatest heat resistance in terms of relative mass gain, then in order of decreasing heat resistance: layers obtained as a result of saturation with boron and silicon, boron and chromium, boron and nitrogen, and as a result of boriding. New composite co

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22

Zhou, Jie, Justinas Palisaitis, Joseph Halim, et al. "Boridene: Two-dimensional Mo4/3B2-x with ordered metal vacancies obtained by chemical exfoliation." Science 373, no. 6556 (2021): 801–5. http://dx.doi.org/10.1126/science.abf6239.

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Extensive research has been invested in two-dimensional (2D) materials, typically synthesized by exfoliation of van der Waals solids. One exception is MXenes, derived from the etching of constituent layers in transition metal carbides and nitrides. We report the experimental realization of boridene in the form of single-layer 2D molybdenum boride sheets with ordered metal vacancies, Mo4/3B2-xTz (where Tz is fluorine, oxygen, or hydroxide surface terminations), produced by selective etching of aluminum and yttrium or scandium atoms from 3D in-plane chemically ordered (Mo2/3Y1/3)2AlB2 and (Mo2/3

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23

Dehm, G., C. Scheu та M. Bamberger. "Microstructure of Ni2B Laser-Induced Surface-Alloyed α-Fe". MRS Proceedings 481 (1997). http://dx.doi.org/10.1557/proc-481-45.

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ABSTRACTSubstrate surfaces of α-Fe were laser alloyed with a CW-CO2 laser using Ni2B powder. Single laser scans and laser scans with a 50% overlap between successive passes were carried out to obtain hard surface coatings on the α-Fe substrate. High hardness values in the range of 520 - 600 Hv1 were achieved by laser boriding of α-Fe, compared to a substrate hardness of ∼ 110 Hv1. The improvement in hardness is caused by an off-eutectic microstructure, which consists of Fe dendrites and Fe3B and Fe lamellae. Both phases, Fe3B and Fe, contain Ni in solid solution. For samples treated with a sin

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