An investigation on boriding kinetics of AISI 316 stainless steel

Özdemir, Ö.; Omar, Mohammed; Usta, Metin; Zeytin, Sakin; Bindal, C.; Üçışık, A.H.

doi:10.1016/j.vacuum.2008.03.026

Cited by 139 publications

(72 citation statements)

References 6 publications

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“…1) and increasing treatment time (Fig. 2) as indicated in literature [20][21][22][23]. The obtained average boride layer thickness of values boronised binary Ti-Ni shape memory alloys were 26, 78, 94 µm and 32, 95, 123 µm for 2, 4, and 8 h at 1173 and 1273 K, respectively.…”

Section: Resultssupporting

confidence: 66%

Diffusion Kinetics of Binary Ti-Ni Shape Memory Alloys

et al. 2017

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In this work, the boriding of binary Ti-Ni shape memory alloys was carried out in a solid medium at 1173 and 1273 K for 2, 4, and 8 h using the powder pack method with Ekabor-Ni powders. The boride layer was characterized by optical microscopy and scanning electron microscopy. The obtained results show that boride layer thickness increases with the increasing boriding temperature and time. Depending on temperature and boride layer thickness, the diffusion process is thermally activated, with the mean value of the activation energy being close to 67 kJ/mol.

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Section: Resultssupporting

confidence: 66%

Diffusion Kinetics of Binary Ti-Ni Shape Memory Alloys

et al. 2017

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“…Boron atoms due to their relatively small size and very mobile nature can diffuse easily into ferrous alloys forming FeB and Fe 2 B intermetallic, nonoxide, ceramic borides. The diffusion of B into steel results in the formation of iron borides (FeB and Fe 2 B) and the thickness of the boride layer is determined by the temperature and time of the treatment [8][9][10][11][12][13][14] . Boriding and plasma nitriding are used in numerous applications in industries such as the manufacture of machine parts for plastics and food processing, packaging and tooling, as well as pumps and hydraulic machine parts, crankshafts, rolls and heavy gears, motor and car construction, cold and hot working dies and cutting tools.…”

Section: Introductionmentioning

confidence: 99%

Corrosion behavior and characterization of plasma nitrided and borided AISI M2 steel

2014

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This study investigates the corrosion behaviors of plasma nitrided (PN) and borided AISI M2 steels. The PN process was carried out in a dc-plasma system at a temperature of 923K for 6 h in a gas mixture of 80%N 2 -20%H 2 under a constant pressure of 5 mbar. The boriding process was carried out in Ekabor-II powder at a temperature of 1223K for 6 h. X-ray diffraction analysis on the surface of the PN and borided steels revealed the presence of FeB, Fe 2 B, CrB, MoB, WB, FeN, Fe 2 N, Fe 3 N and Fe 4 N compounds. Corrosion surfaces of the samples were analyzed using a SEM microscopy and X-ray energy dispersive spectroscopy EDS. The corrosion resistance of PN and borided AISI M2 steel is higher compared with that of untreated AISI M2 steel. Corrosion resistances of the PN and borided AISI M2 steel increased the 4-6-fold.

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“…A number of diffusion models have been proposed for studying the boride layer growth kinetics, [5][6][7] and growth kinetics of boride layers on a variety of metallic materials have been analyzed by measuring the thickness of the layer as a function of the boriding time and temperature, including AISI 5140, 4340, D2, H13, W1, M2, 316 stainless steels, etc.. [8][9][10][11][12] Due to the slow boriding rate and thin boride layer associated with the conventional pack boriding, in industry application, boriding is usually carried out at the high temperature ranging from 1 173 K to 1 273 K to accelerate the diffusion process, and for a period of 4 h to 6 h to attain a desired boride layer thickness. These problems give rise to the low production efficiency and high production cost for the pack boriding process.…”

Section: Introductionmentioning

confidence: 99%

Catalysis of Rare Earth Element Nd on Boriding of AISI 1045 Steel

et al. 2011

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The present study evaluate the catalysis of Nd2O3 on the boriding of AISI 1045 steel using a 5% Nd2O3-containing boriding agent in a temperature range of 1 213 K to 1 350 K for 2 h-5 h. The morphology and types of borides formed on the steel surface were confirmed by optical microstructure, scanning electron microscopy and X-ray diffraction. The results show that the Nd2O3 has contrary effects on boriding process, i.e. promotion at high temperatures or hindrance at low temperatures. Nd2O3 addition can significantly reduce the activation energy of boride growth at high temperatures, decreased it from 198 kJ/mol to 137 kJ/mol, reduced by 31% in the high temperature range of 1 133 K-1 213 K as compared with that without Nd2O3 addition. The catalysis mechanism of RE element Nd during boriding process was discussed through the analysis of chemical reactions probably occurred in boriding agent, changes in surface morphology and chemical composition.

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An investigation on boriding kinetics of AISI 316 stainless steel

Cited by 139 publications

References 6 publications

Diffusion Kinetics of Binary Ti-Ni Shape Memory Alloys

Diffusion Kinetics of Binary Ti-Ni Shape Memory Alloys

Corrosion behavior and characterization of plasma nitrided and borided AISI M2 steel

Catalysis of Rare Earth Element Nd on Boriding of AISI 1045 Steel

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