Growth of boride coatings on iron

Palombarini, G.; Carbucicchio, M.

doi:10.1007/bf01756781

Cited by 52 publications

(25 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[3,4] Boronizing is a thermo chemical surface treatment process where boron atoms are diffused into a metal substrate and form one or more hard boride layers on the metal surface. [5,6] Boron atoms can dissolve in iron interstitially, but can react with it to form FeB and Fe 2 B intermetalic compounds. Depending on the potential of medium and chemical composition of base materials, single or duplex layer may be formed.…”

Section: Introductionmentioning

confidence: 99%

Characterization and Rockwell-C adhesion properties of chromium-based borided steels

Kayalı

Taktak

2015

Journal of Adhesion Science and Technology

View full text Add to dashboard Cite

In this study, adhesion properties of boride layers formed on the surface of AISI 52100, AISI 5140, AISI 440C, AISI 420 and AISI 304 steels were investigated. Boronizing treatment was carried out in Ekabor-II powders at the temperatures of 850 and 950°C for 4 h. The properties of boride layers were evaluated by optical microscopy, SEM, X-ray diffraction and micro-Vickers hardness tester. The Daimler-Benz Rockwell-C adhesion test was used to assess the adhesion of boride layers. Test result showed that adhesion of boride layers depended on the dual-phase structure. The stresses at the FeB/Fe 2 B interphase caused delamination failure and poor interphase adhesion with increase in the depth of hard and brittle FeB-based layer.

show abstract

Section: Introductionmentioning

confidence: 99%

Characterization and Rockwell-C adhesion properties of chromium-based borided steels

Kayalı

Taktak

2015

Journal of Adhesion Science and Technology

View full text Add to dashboard Cite

show abstract

“…Moreover, the Fe 2 B phase has an orthorhombic structure [29,30], whose longitudinal axis is favorable for the nucleation of the Fe 2 B grains. As in previous studies [31][32][33], these grains grow preferentially along the [0 0 2], which is opposite to the heating squeezed direction.…”

Section: Resultsmentioning

confidence: 76%

Effect of Fe 2 B orientation on erosion–corrosion behavior of Fe–3.5 wt.% B steel in flowing zinc

Wang

Xing

et al. 2015

Corrosion Science

View full text Add to dashboard Cite

“…Since the growth of a saw-tooth boride layer is a controlled diffusion process with a highly anisotropic nature, higher temperatures and/or longer times stimulated the Fe 2 B crystals to make contact with the adjacent crystals and forced them to retain an acicular shape. 21 It is seen that the thickness of the Fe 2 B layer increased with an increase in the boriding time (Figure 3) because the boriding kinetics is influenced by the treatment time. For the kinetic study, the boride-layer thickness was automatically measured with the aid of the MSQ PLUS software.…”

Section: Microscopical Observations Of Boride Layersmentioning

confidence: 96%

“…As the metal surface is covered, an increasing number of the Fe 2 B crystals come in contact with the adjacent crystals, being forced to grow inside the metal and retaining the acicular shape. 21 In the powder-pack boriding, the active boron is supplied by the powder mixture. To form a Fe 2 B phase on any borided steel, a low boron potential is required as reported in the reference works 4,29 , while a high amount of active boron in a powder mixture gives rise to a bilayer configuration consisting of FeB and Fe 2 B.…”

Section: X-ray Diffraction Analysismentioning

confidence: 99%

Kinetic study and characterization of borided AISI 4140 steel

Кеддам¹

2015

Mater. Tehnol.

View full text Add to dashboard Cite

In the present study, an alternative diffusion model was proposed for analyzing the growth of Fe 2 B layers formed on the AISI 4140 steel during the pack-boriding process. This model was based on solving the mass-balance equations for the Fe 2 B/Fe interface to evaluate boron diffusion coefficients through the Fe 2 B layers in a temperature range of 1123-1273 K. The boride incubation time for the Fe 2 B phase was included in the present model. The suggested model was validated experimentally at a temperature of 1253 K for a treatment time of 5 h. Furthermore, the generated boride layers were analyzed with light microscopy, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction analysis (XRD). In addition, a contour diagram was also proposed as a function of treatment time and temperature. On the basis of our experimental results, the boron activation energy for the AISI 4140 steel was found to be 189.24 kJ mol -1 . Keywords: boriding, incubation time, diffusion model, growth kinetics, activation energy, adherence V tej {tudiji je predlagan alternativni model difuzije za analiziranje rasti Fe 2 B-plasti, ki nastane na jeklu AISI 4140 pri boriranju v {katli. Ta model temelji na re{itvi ena~be ravnote`ja mas na stiku (Fe 2 B/Fe) pri oceni koeficienta difuzije bora skozi Fe 2 B-sloje v temperaturnem obmo~ju 1123-1273 K. Inkubacijski~as borida za Fe 2 B-fazo je bil vklju~en v predstavljeni model. Predlagani model je bil eksperimentalno ocenjen pri temperaturi 1253 K in~asu obdelave 5 h. Poleg tega so bili izdelani sloji analizirani na svetlobnem mikroskopu, z vrsti~nim elektronskim mikroskopom (SEM), energijsko disperzijsko rentgensko spektroskopijo (EDS) in z rentgensko difrakcijsko analizo (XRD). Dodatno je bil predlagan {e konturni diagram kot funkcija~asa obdelave in temperature. Na podlagi eksperimentalnih rezultatov je bilo ugotovljeno, da je aktivacijska energija bora pri jeklu AISI 4140 189,24 kJ mol -1 .

show abstract

Growth of boride coatings on iron

Cited by 52 publications

References 7 publications

Characterization and Rockwell-C adhesion properties of chromium-based borided steels

Characterization and Rockwell-C adhesion properties of chromium-based borided steels

Effect of Fe 2 B orientation on erosion–corrosion behavior of Fe–3.5 wt.% B steel in flowing zinc

Kinetic study and characterization of borided AISI 4140 steel

Contact Info

Product

Resources

About