Boriding kinetics of C35 steel: estimation of boron activation energy and the mass gain

Bouarour, B.; Кеддам, М.; Allaoui, Omar; Azouani, O.

doi:10.1051/metal/2014015

Cited by 13 publications

(5 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Basing on our experimental data, the boron activation energy o f the X200CrMoV12 steel was estimated as 199.37 kJ moT It is interpreted as the required energy to stimulate the boron diffusion through the [001] preferred direction [12], This value was then compared with the results found in the literature. It is seen that the determined values of boron activation energies [13,[21][22][23][24][25][26] are found to be dependent on the boriding method and on the chemical composition of the substrates as well as on the mechanism o f boron diffusion into the substrate surface.…”

Section: Discussionmentioning

confidence: 92%

“…The reported values of the activation energies [13,[21][22][23][24][25][26] of the borided steels are listed in Table 2 together with the value of boron activation energy (199.37 kJ mol"1) estimated in this work. …”

Section: Determination O F the Activation Energy Of Boron Diffusionmentioning

confidence: 97%

“…The morphology of the (boride layer/substrate) interface is affected by the presence of alloying elements [8][9][10][11]. The (boride layer/substrate) exhibits a saw tooth morphology for Armco iron and carbon steels [12][13][14] whereas this interface tend to be flat in the case of high -alloy steels [15,16].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Diffusion kinetics of boron in the X200CrMoV12 high-alloy steel

Azouani

Кеддам

Brahimi

et al. 2015

J min metall B Metall

Self Cite

View full text Add to dashboard Cite

In this work, the kinetics o f the boride layers (FeB/Fe2B), formed on the X200CrMoV12 steel used fo r the cold-working, was investigated. The bonding treatment was carried out in the powder mixture consisting o f 5%B,C, 5% NaBF. and 90% SiC. The bonding parameters are : 900, 950 and 1000°C with treatment times o f 2, 4 and 6 h. The obtained bonded layers (FeB/Fe,B) were characterized by the following experimental techniques: optical microscopy, scanning electron microscopy coupled to EDS analysis and XRD analysis. The kinetics o f boron diffusion in the X200CrMoV12 steel was also studied. As a result, the time dependence o f the bonded layers thicknesses followed a growth parabolic law. The boron activation energy was estimated as 199.37 kJ m ol' for the X200CrMoV12 steel. A full factorial design with 2 factors at 3 levels was employed to estimate the total boride layer thickness as a function o f the bonding parameters (time and temperature) and a simple equation was proposed. Finally, an iso-thickness diagram was given as a tool to predict the total boride layers thicknesses in relation with the practical utilization o f this kind o f steel.

show abstract

Section: Discussionmentioning

confidence: 92%

Section: Determination O F the Activation Energy Of Boron Diffusionmentioning

confidence: 97%

See 1 more Smart Citation

Diffusion kinetics of boron in the X200CrMoV12 high-alloy steel

Azouani

Кеддам

Brahimi

et al. 2015

J min metall B Metall

Self Cite

View full text Add to dashboard Cite

show abstract

“…The boride-layer thickness varies parabolically [14][15][16][17] with the process time given by Equation (1):…”

Section: Estimation Of the Boron Activation Energymentioning

confidence: 99%

Characterization and kinetics of plasma-paste-borided AISI 316 steel

Chegroune¹,

Кеддам²,

Abdellah³

et al. 2016

Mater. Tehnol.

View full text Add to dashboard Cite

In this work, AISI 316 steel was plasma-paste borided in a gas mixture of 70 % H2 -30 % Ar using a mixture of 30 % SiC + 70 % B2O3 as a boron source. The samples were treated at temperatures of (700, 750 and 800)°C for (3, 5 and 7) h. The morphology of the formed boride layers was examined by light microscope and scanning electron microscope coupled to an EDS analyser. The borides present in the boride layer were identified by means of XRD analysis. The boron-activation energy for the AISI 316 steel was found to be equal to 250.8 kJ mol -1 . This value for the energy was compared to the literature data. A regression model based on a full factorial design was used to estimate the boride layers' thicknesses as a function of the boriding parameters: time and temperature. A comparison was made between the values of the boride layers' thicknesses estimated from the regression model with those given by an empirical relation. In addition, an iso-thickness diagram was plotted to predict the boride-layer thickness as a function of the processing parameters. This iso-thickness diagram can serve as a simple tool to select the optimum values for the boride layers' thicknesses for a practical utilisation in industry for this kind of steel. Keywords: plasma paste boriding, kinetics, borides, transition zone, activation energy, regression model V tem delu je bilo jeklo AISI 316 borirano s plazmo v me{anici plinov 70 % H2 -30 % Ar, z uporabo me{anice (30 % SiC + 70 % B2O3), kot vir bora. Vzorci so bili obdelani pri treh temperaturah (700, 750 in 800)°C v trajanju (3, 5 in 7) h. Morfologija nastale boridne plasti je bila preiskovana s svetlobnim mikroskopom in z vrsti~nim elektronskim mikroskopom, opremljenim z EDS analizatorjem. Boridi v borirani plasti so bili identificirani z rentgensko analizo. Aktivacijska energija bora v jeklu AISI 316 je bila 250,8 kJ mol -1 . Ta vrednost je bila primerjana s podatki iz literature. Za dolo~anje debeline borirane plasti v odvisnosti od parametrov boriranja (~as in temperatura), je bil uporabljen regresijski model, ki temelji na upo{tevanju faktorjev. Izvr{ena je bila primerjava debeline borirane plasti, dolo~ene z regresijskim modelom in primerjava s tisto, ki je bila dolo~ena empiri~no. Za napovedovanje debeline borirane plasti je bil postavljen diagram enake debeline v odvisnosti od procesnih parametrov. Diagram enake debeline je uporaben kot enostavno orodje pri izbiri optimalne debeline borirane plasti, za prakti~no uporabo v industriji za to vrsto jekla. Klju~ne besede: plazma boriranje s pasto, kinetika, boridi, prehodno podro~je, aktivacijska energija, regresijski model

show abstract

“…The growth kinetics of entire boride layer on AISI H13 steel has been investigated by plotting its thickness versus the square root of treatment time for increasing temperatures according to Equation (5) [30][31][32][33].…”

Section: Kinetic Studymentioning

confidence: 99%

Characterization of bilayer (FeB/Fe₂B) on AISI H13 work tool steel

Boumaali

Nait

Кеддам

2021

Koroze a Ochrana Materialu

Self Cite

View full text Add to dashboard Cite

In this work, the borided layers were produced on AISI H13 steel via solid boriding with a powders mixture containing 90 wt.% B4C and 10 wt.% NaBF4 for treatment times of 2-6 h at 900, 950 and 1000 °C. The microscopic observations revealed a less pronounced toothed interface between the borided layer and the transition zone. The XRD studies indicated the presence of a dual phase boride layer (FeB/Fe2B) besides the chromium and vanadium borides as precipitates inside it. The boronizing kinetics of AISI H13 steel was investigated by using the classical parabolic growth law. The obtained value of boron activation energy in the entire boride layer (FeB + + Fe2B) was found to be 236.34 kJ mol-1. Furthermore, this value of energy has been compared to the literature data. Finally, the nanohardness and reduced modulus of elasticity were measured for FeB, Fe2B and transition zone.

show abstract

Boriding kinetics of C35 steel: estimation of boron activation energy and the mass gain

Cited by 13 publications

References 17 publications

Diffusion kinetics of boron in the X200CrMoV12 high-alloy steel

Diffusion kinetics of boron in the X200CrMoV12 high-alloy steel

Characterization and kinetics of plasma-paste-borided AISI 316 steel

Characterization of bilayer (FeB/Fe₂B) on AISI H13 work tool steel

Contact Info

Product

Resources

About

Boriding kinetics of C35 steel: estimation of boron activation energy and the mass gain

Cited by 13 publications

References 17 publications

Diffusion kinetics of boron in the X200CrMoV12 high-alloy steel

Diffusion kinetics of boron in the X200CrMoV12 high-alloy steel

Characterization and kinetics of plasma-paste-borided AISI 316 steel

Characterization of bilayer (FeB/Fe2B) on AISI H13 work tool steel

Contact Info

Product

Resources

About

Characterization of bilayer (FeB/Fe₂B) on AISI H13 work tool steel