Metal surface modification by plasma boronizing in a two-temperature-stage process

Nam, Kee‐Seok; Lee, Ku-Hyun; Lee, Deuk Yong; Song, Yo-Seung

doi:10.1016/j.surfcoat.2004.10.099

Cited by 10 publications

(6 citation statements)

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“…When compared to the conventional thermo-chemical boriding processes, plasma-assisted boriding has many advantages: shorter duration of process, lower temperature of process, relatively low gas consumption, lower activation energy for the formation of the boride layers, and reduction in emission of pollutants and toxic wastes [ 1 , 2 ]. Plasma-assisted boriding has become an interesting technique for producing the borided layers on various materials such as: steels [ 1 , 2 , 3 , 4 , 5 , 6 , 7 ], titanium alloys [ 8 , 9 , 10 , 11 , 12 , 13 ], nickel alloys [ 14 , 15 ], molybdenum alloys [ 16 ] and cobalt alloys [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Growth Kinetics and Some Mechanical Properties of Plasma Paste Borided Layers Produced on Nimonic 80A-Alloy

et al. 2021

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Plasma paste boriding was employed in order to produce the boride layers on Nimonic 80A-alloy. The process was carried out at temperatures of 1023 K, 1073 K and 1123 K for 3, 4 and 6 h in a gas mixture of 50% H2-50% Ar. Borax paste was used as a boron source. The microstructure of the produced surface layers consisted of the mixture of nickel borides and chromium borides. The effect of processing temperature and duration on the thickness of the borided layers was observed. The theoretical thicknesses of the borided layers were estimated using an integral diffusion model. A good correlation was obtained between the theoretical (modeled) and experimental depths of the plasma paste borided layers. The boride layers were characterized by a high hardness ranging from 1160 HV to 2132 HV. The multiphase character of the produced layers resulted in differences in hardness. A significant improvement of the wear resistance of the plasma paste borided Nimonic 80A-alloy was observed in comparison with the non-borided alloy.

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Section: Introductionmentioning

confidence: 99%

Growth Kinetics and Some Mechanical Properties of Plasma Paste Borided Layers Produced on Nimonic 80A-Alloy

et al. 2021

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“…Boronizing can be carried out by different methods. The medium of boronizing can be solid (paste or powder), liquid or gas [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…The bilayer configuration (FeB+Fe2B) can be converted into a single layer (Fe2B) by the diffusion annealing process [1][2][3][4][5][6][7] to improve its surface properties.…”

Section: Introductionmentioning

confidence: 99%

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Diffusion Model for Simulating the Kinetics of Boronizing Process in the Case of FeB/Fe2B Bilayer Configuration

Belguendouz¹,

Mebarek²,

Кеддам³

et al. 2020

ACSM

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In this work, we developed a diffusion model based on the second Fick's law and the solving of the mass balance equations of the (FeB/Fe2B) interface to simulate the boronizing kinetics in the case of bilayer configuration (FeB/Fe2B) formed on AISI D2 steel. It is known that the boronizing process is a thermochemical surface treatment generally carried out at temperatures ranging between 1223 K and 1323 K. The knowledge of the temperature and the processing time are necessary to simulate and optimize the boronizing process. The developed model in this study is used to estimate the value of the growth rate constant in each phase, to simulate the boride layer thickness formed on AISI D2 steel, to determine the boron concentration profile and to evaluate the mass gain at the surface of the borided AISI D2 steel. To validate the developed model, we used the experimental data taken from the literature concerning the layers thicknesses of FeB and Fe2B layers obtained for different process parameters. Finally, these experimental values are compared to the calculated results. A good agreement was observed between the simulated results and the experimental data.

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“…Sıvı borlamada boraks, borik asit ve ferro silis karışımından oluşan erimiş tuz banyosuna numune daldırılır ve bu sıvı karışım ergimesi sonucunda sıvı ortamında borlama gerçekleşir. Plazma ve gaz ortamında gerçekleşen borlama işleminde BCl 3 ve BF 3 gibi bor kaynakları ile H 2 ile Ar gazları kullanılmaktadır [4][5][6][7]. Plazma ve gaz borlamada, malzeme yüzeyi temiz olmasına rağmen kullanılan gazların zehirli, pahalı ve patlayıcı olması bu işlemin dezavantajlarındandır.…”

Section: Introductionunclassified

Borlanmış Sementasyon Çeliğinin Tribolojik Özelliklerinin İncelenmesi

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2019

El-Cezeri Fen Ve Mühendislik Dergisi

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Bu çalışmada farklı B 2 O 3 /SiC/B 4 C pasta karışımlarında plazma pasta borlanmış sementasyon çeliğinin yüksek yük altındaki aşınma davranışları inceleniştir. Plazma borlama işlemi vakum altında 10 mbar işlem basıncında, H 2 ve Ar gazları kullanılarak 700, 750 ve 800 °C'de 5 saat süresince gerçekleştirilmiştir. Aşınma deneylerinde Plint Firması'nın "TE 53SLIM çok-amaçlı sürtünme ve aşınma test cihazı" pin-on-ring sisteminde gerçekleştirilmiştir. Deneyler 70 N yük altında, sabit kayma hızında (yaklaşık 0,3 m/s), 500 metre mesafe boyunca ve oda sıcaklığında yapılmıştır. Aşınma sonrasında numunelerin yüzey pürüzlülüğü, sürtünme katsayısı, aşınma iz derinliği, aşınma ağırlık kayıpları, aşınma hızları araştırılmıştır. Aşınma sonucunda farklı B 2 O 3 /SiC/B 4 C pasta karışımlarında plazma pasta borlanmış sementasyon çeliğinin aşınmaya karşı direncinin her bir pasta karışımında farklılık gösterdiği tespit edilmiştir.

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Metal surface modification by plasma boronizing in a two-temperature-stage process

Cited by 10 publications

References 10 publications

Growth Kinetics and Some Mechanical Properties of Plasma Paste Borided Layers Produced on Nimonic 80A-Alloy

Growth Kinetics and Some Mechanical Properties of Plasma Paste Borided Layers Produced on Nimonic 80A-Alloy

Diffusion Model for Simulating the Kinetics of Boronizing Process in the Case of FeB/Fe2B Bilayer Configuration

Borlanmış Sementasyon Çeliğinin Tribolojik Özelliklerinin İncelenmesi

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