Application of integral method for investigating the boriding kinetics of AISI 316 steel

Zouzou, Chaima; Кеддам, М.

doi:10.1051/metal/2020011

Cited by 8 publications

(6 citation statements)

References 32 publications

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“…In Table 2 are displayed the new kinetics constants at the (Fe 2 B/FeB) interface fitted with Equation (3). In Table 3 are grouped the calculated values of boron diffusivities in FeB and Fe 2 B and those of the non-dimensional parameters (ε 1 and ε 2 ) with the help of the integral method (see Equations (34) and (35)) between 1173 and 1323 K and for C FeB up = 16.40 wt.%. It is noticed that the numerical values of ε 1 and ε 2 are nearly constant.…”

Section: Assessment Of Boron Diffusivities In Feb and Fe 2 B With The...mentioning

confidence: 99%

“…Kinetically, different kinetic approaches have been established to control the growth kinetics of compact layers composed of Fe 2 B [15][16][17][18][19][20][21][22] or (FeB and Fe 2 B) [23][24][25][26][27][28][29][30][31][32][33][34][35] and formed on ferrous alloys. All these mathematical models help to select the optimum values of boride layers' thicknesses according to the requirements imposed by the utilization of these ferrous materials in the industry.…”

Section: Introductionmentioning

confidence: 99%

“…Zouzou and Keddam [35] have extended the use of the integral diffusion model for FeB, Fe 2 B and diffusion zone formed on AISI 316 steel with the presence of boride incubation periods.…”

Section: Introductionmentioning

confidence: 99%

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Simulating the Growth of Dual-Phase Boride Layer on AISI M2 Steel by Two Kinetic Approaches

Кеддам

Jurči

2021

Coatings

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Two kinetic approaches (integral method and Dybkov method) have been applied for simulating the boriding kinetics of AISI M2 steel in the range of 1173 to 1323 K, by including the effect of incubation periods. For the integral method, a peculiar solution of the resulting system of differential algebraic equations (DAE) has been employed for assessing the diffusivities of boron in FeB and Fe2B. The boron activation energies in FeB and Fe2B have been deduced from both approaches and compared with the data taken from the literature. Furthermore, to experimentally extend the validity of both approaches, four additional boriding conditions obtained on the boronized samples at 1173, 1223, 1273 and 1323 K for 10 h were then used. The predicted boride layers’ thicknesses were confronted to the experimental values. Consequently, a satisfactory concordance was obtained when comparing the simulated layers’ thicknesses to the experimental values derived from the literature.

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Section: Assessment Of Boron Diffusivities In Feb and Fe 2 B With The...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Simulating the Growth of Dual-Phase Boride Layer on AISI M2 Steel by Two Kinetic Approaches

Кеддам

Jurči

2021

Coatings

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“…Boronizing (boriding) is a diffusion-based thermochemical surface treatment. Boron atoms are diffused into the surface of the metal material (M-B, M=Fe, Ni, Cr, Ti, Mo, V, W, Mn, etc) in this method and hard boride layers are obtained [13][14][15][16]. Boronizing process can be performed in ferrous and non-ferrous alloys in the temperature range 973-1273 °K for a time 0.5 to 10 h in solid, liquid or gaseous medium [17].…”

Section: Introductionmentioning

confidence: 99%

Microstructural and mechanical characterization of powder-pack boronized Incoloy A286 superalloy

Türkmen¹,

Korkmaz²

2021

Surf. Topogr.: Metrol. Prop.

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In this study, Incoloy A286 superalloy were boronized successfully by powder-pack boronizing process at 850 °C, 900 °C and 950 °C for 4 h by using a boronizing powder mixture containing H3BO3 as boron source. The thickness and morphology of the boride layer was identified by microstructural examinations. The boride layer with complex, compact and smooth morphology was formed on the surface of the samples. As a result of XRD analyses, it was determined that the compact boride layer was formed many phases such as FeB, Fe2B, Fe3B, CrB and Ni4B3 etc. It was specified that the average hardness value of the boride layer was approximately between 2400 and 3000 HV by microhardness tests. Also the graphs of friction coefficient and values of the specific wear rate were obtained by performing ball on disk wear tests. It was identified that the specific wear rate of boronized samples was approximately 9.5 times lower than that of unboronized samples.

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“…Figure 2 -Comparison of the calculated and predicted thickness of the boride diffusion layer. [16-19] -respectively, the calculated values of the thickness of the boride layer, made according to these sources[16][17][18][19] …”

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confidence: 99%

Формирование Диффузионного Слоя На Стали 45 При Одновременном Насыщении Бором, Хромом И Титаном

Гурьев¹,

Иванов²,

Гурьев³

et al. 2021

Ползуновский Вестник

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Аннотация. Однокомпонентное упрочнение стальных изделий (борирование, хромирование, азотирование, цементация) повышает износостойкость, при этом оно повышает хрупкость поверхности, снижает стойкость при тяжелых циклических нагрузках, имеет относительно низкую коррозионную стойкость. Многокомпонентные покрытия, полученные путем комплексного насыщения сталей и сплавов одновременно бором, хромом и титаном, имеют превосходные характеристики износостойкости, пластичности и коррозионной стойкости. Проведены исследования по определению кинетики формирования покрытия на стали 45 при одновременном диффузионном насыщении бором, хромом и титаном. Установлено, что экспериментальные параметры толщины диффузионного слоя боридов во времени превышают расчетные значения. Диффузионный слой имеет толщину 120 мкм при продолжительности насыщения 2,5 часа, 155 мкм при продолжительности насыщения 5 часов и 180 мкм при продолжительности насыщения 7,5 часов. Максимальная микротвердость диффузионного покрытия наблюдается не на поверхности, а на некотором расстоянии от нее (в среднем на глубине 45-60 мкм от поверхности), и достигает значений около 3200 HV0,1. При этом на поверхности образцов микротвердость принимает минимальное значение около 1800 HV0,1. Разработанный способ и состав позволяет получать качественные боридные покрытия. Нехарактерное распределение микротвердости с увеличением от поверхности к середине слоя дает возможность применения финишной обработки (шлифовки и / или полировки) без значительных потерь свойств, присущих диффузионным боридным слоям, что позволяет значительно расширить область применения борирования ответственных деталей машин, имеющих высокие требования к размерной точности и качеству поверхности.

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Application of integral method for investigating the boriding kinetics of AISI 316 steel

Cited by 8 publications

References 32 publications

Simulating the Growth of Dual-Phase Boride Layer on AISI M2 Steel by Two Kinetic Approaches

Simulating the Growth of Dual-Phase Boride Layer on AISI M2 Steel by Two Kinetic Approaches

Microstructural and mechanical characterization of powder-pack boronized Incoloy A286 superalloy

Формирование Диффузионного Слоя На Стали 45 При Одновременном Насыщении Бором, Хромом И Титаном

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