Characterization, Tribological and Mechanical Properties of Plasma Paste Borided AISI 316 Steel

Кеддам, М.; Chegroune, R.; Kulka, Michał; Makuch, Natalia; Panfil, Dominika; Siwak, Piotr; Taktak, Sukru

doi:10.1007/s12666-017-1142-6

Cited by 39 publications

(32 citation statements)

References 28 publications

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“…2, where the FeB layer on the top surface (region 1) is followed by an inner layer (Fe 2 B -region 2) formed on the surface of the boronized specimen. Similar microstructures have been were obtained in boronized stainless steels by other authors [18][19][20].…”

Section: Methodssupporting

confidence: 87%

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Depth Corrosion Characteristics of Borided Layer Produced on AISI 321 Stainless Steel

Jagielska-Wiaderek

2019

Acta Phys. Pol. A

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This paper presents the results of effects of boronizing process of AISI 321 austenitic stainless steel on its electrochemical corrosion resistance. The steel samples were boronized at a temperature of 900 • C for 6 h. In this process, a mixture powder (B4C, SiC, borax), alumina (Al2O3) and potassium fluoroborate (KBF4) was used. The evaluation of the corrosion resistance of boronized stainless steel was carried out by using the so-called progressive thinning method, consisting in determination of polarisation characteristics on increasingly-deeper situated regions of the top layer. This method made it possible to determine changes in particular corrosion parameters read out from potentiodynamic polarisation curves, thus enabling the depth profiles of these parameters. Potentiodynamic polarization tests were carried out in an 0.5 M sulphate solution acidified to pH = 2.0. It is shown that unlike unmodified steel, the boron-rich outer layer does not passivate but undergoes fast dissolution both in active-and transpassive regions in the corrosion solution.

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Section: Methodssupporting

confidence: 87%

“…2). The presence of hard FeB and, especially, CrB borides is an explanation for such a situation [18]. The second zone includes Fe 2 B and Cr 2 B borides.…”

Section: Resultsmentioning

confidence: 99%

Depth Corrosion Characteristics of Borided Layer Produced on AISI 321 Stainless Steel

Jagielska-Wiaderek

2019

Acta Phys. Pol. A

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“…Borided steels are resistant to abrasion because of their extreme hardness on the surface; this characteristic makes them suitable to be applied in pneumatic conveying systems; dies for stamping; components of plastic processing machines, such as extrusion screws; bearings for oil extraction pumps; ball valves; plungers for use in manufacturing glass; and components in textile machinery. In practice, there are many techniques of surface modification by boriding, such as powder-pack boriding [5], paste boriding [6], gaseous boriding [7], plasma boriding [8], plasma paste boriding [9], and laser boriding [10]. However, the most frequently used method in industry is the powder-pack boriding, which demands a low investment cost of equipment and an easy handling.…”

Section: Introductionmentioning

confidence: 99%

Modeling of the Growth Kinetics of Boride Layers in Powder-Pack Borided ASTM A36 Steel Based on Two Different Approaches

Domı́nguez

Gómez-Vargas

Parga

et al. 2019

Advances in Materials Science and Engineering

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An indispensable tool to choose the suitable process parameters for obtaining boride layer of an adequate thickness is the modeling of the boriding kinetics. In this work, two mathematical approaches were used in order to determine the value of activation energy in the Fe2B layers on ASTM A36 steel during the iron powder-pack boriding in the temperature range of 1123–1273 K for treatment times between 2 and 8 h. The first approach was based on the mass balance equation at the interface (Fe2B/substrate) and the solution of Fick’s second law under steady state (without time dependent). The second approach was based on the same mathematical principles as the first approach for one-dimensional analysis under non-steady-state condition. The measurements of the thickness (Fe2B), for different temperatures of boriding, were used for calculations. As a result, the boron activation energy for the ASTM A36 steel was estimated as 161 kJ·mol−1. This value of energy was compared between both models and with other literature data. The Fe2B layers grown on ASTM A36 steel were characterized by use of the following experimental techniques: X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray Spectroscopy (EDS). Finally, the experimental value of Fe2B layer’s thickness obtained at 1123 K with an exposure time of 2.5 h was compared with the predicted thicknesses by using these two approaches. A good concordance was achieved between the experimental data and the simulated results.

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“…This is a consequence of the presence of hard boride phases (FeB, Fe2B, and additionally from Ni-Fe due to solid solution hardening) as determined by the XRD analysis in this region. On the other hand, the decrease in the hardness value towards the matrix is explained by the increasing proportion of the matrix surrounding the iron boride needles [23,32,33]. In addition to this, the outer FeB phase in the boride layer was found to be much harder than the inner Fe2B phase (Fig.…”

Section: Hardness Testsmentioning

confidence: 92%

Metallurgical Characterization and Kinetics of Borided 34CrNiMo6 Steel

Uçar

Yigit

Çalık

2020

Advances in Materials Science

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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 to be between 1.2×10−13 – 9.8×10−13 m2/s depending on temperature. The activation energy for boron diffusion was estimated as 239.4±8.6 kJ mol−1. This value was comparable to the activation energies reported for medium carbon steels in the literature.

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Characterization, Tribological and Mechanical Properties of Plasma Paste Borided AISI 316 Steel

Cited by 39 publications

References 28 publications

Depth Corrosion Characteristics of Borided Layer Produced on AISI 321 Stainless Steel

Depth Corrosion Characteristics of Borided Layer Produced on AISI 321 Stainless Steel

Modeling of the Growth Kinetics of Boride Layers in Powder-Pack Borided ASTM A36 Steel Based on Two Different Approaches

Metallurgical Characterization and Kinetics of Borided 34CrNiMo6 Steel

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