Plasma paste boronizing of AISI 8620, 52100 and 440C steels

Güneş, İbrahim; Ulker, Sukru; Taktak, Sukru

doi:10.1016/j.matdes.2010.11.031

Cited by 73 publications

(45 citation statements)

References 30 publications

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“…The boriding treatment can be carried out in solid, liquid, gaseous or plasma media. [2][3][4][5] Due to their relatively small size and very mobile nature, boron atoms can diffuse into the surface material to form hard borides. In the case of ferrous materials, the boriding treatment leads to the formation of either a single layer (Fe 2 B) or a double-layer (FeB+Fe 2 B) with a definite composition.…”

Section: Introductionmentioning

confidence: 99%

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

Chegroune¹,

Кеддам²,

Abdellah³

et al. 2016

Mater. Tehnol.

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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

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Section: Introductionmentioning

confidence: 99%

“…This recently developed method uses inert gases such as hydrogen, argon and nitrogen, making it very advantageous. 5 The objective of this work was to investigate the boriding kinetics of AISI 316 steel by plasma paste boriding. The boron-activation energy for the AISI 316 steel was also estimated basing on our experimental results.…”

Section: Introductionmentioning

confidence: 99%

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

Chegroune¹,

Кеддам²,

Abdellah³

et al. 2016

Mater. Tehnol.

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“…Yoğun borür tabaka kalınlığının ve toplam borür tabaka kalınlığının borlama sıcaklığı ile arttığı görülmektedir (Tablo 1). Ancak, 800 °C yapılan borlama işlemi sonrası geçiş bölgesinin ne OM ne de SEM tespit edilmediği Pamukkale Univ Muh Bilim Derg, 23 (8), 1004-1008, 2017 (16. …”

Section: Deneysel çAlışmaunclassified

“…Bor kaynağından bor atomunun serbest hale geçişi, altlık malzemeye bor elementinin yayınımı ve meydana gelen reaksiyonlar sonucunda borür bileşiklerinin oluşumu ile ilgili mekanizma literatürde yer bulmuştur [6]. Yüzeyde borür bileşiklerin oluşturduğu kalınlığı, sertliği, aşınma ve korozyon direnci, gözenekli yapısı, yüzey pürüzlülüğü proses süresine, sıcaklığına, bor kaynağına ve altlık malzemenin kimyasal kompozisyonuna bağlıdır [2]- [8]. Bu değişkenlerden altlık malzemenin kompozisyonu kontrol edilmesi proses değişkenlerinden bağımsız olduğundan, çelik içerisindeki alaşım elementlerinin oluşturulan borür tabakasına etkisinin anlaşılması önemlidir.…”

Section: Introductionunclassified

Boronizing of equiatomic Fe-Cr binary alloy

Tarakçı¹

2017

Pamukkale J Eng Sci

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“…1) Boronizing is an effective thermochemical surface hardening technique used to produce very hard and wear-resistant coatings on iron and iron-based alloys. Various boronizing techniques have been developed, which include pack boronizing, 2,3) superplastic boronizing, 4,5) plasma boronizing, 6,7) electrochemical boronizing, 8,9) laser boronizing, 10,11) gaseous boronizing 12,13) etc. Currently, pack boronizing and molten salt boronizing are popular due to their technological simplicity and low cost.…”

Section: Introductionmentioning

confidence: 99%

Effect of Powder Particle Size on the Mechanical Properties of Boronized EN H320 LA Steel Sheets

Çalık

2013

ISIJ Int.

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EN H320 LA steel sheets were boronized with four different boron sources (Ekabor 1, Ekabor 2, Ekabor 3 and Ekabor HM) by the powder pack method. The boronizing process was carried out at 973, 1 073 and 1 173 K for 3 h. The borided samples were investigated by means of X-ray diffraction, optical microscopy, microhardness measurements and tensile tests. XRD studies showed that the boride layer consisted of phases FeB and Fe2B. The microhardness of the boride layers ranged between 1 450 and 1 651 HV, depending on the boronizing source. The thickness of the boride layer increased with increasing particle size of the boronizing powders and with increasing boronizing temperature. Tensile properties were also affected by the boronizing process and the particle size of the boronizing powders. Microhardness, tensile strength and elongation values were improved with the boronizing treatment. Extensive cracking was observed at the interface between the Fe2B and FeB layers.

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Plasma paste boronizing of AISI 8620, 52100 and 440C steels

Cited by 73 publications

References 30 publications

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

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

Boronizing of equiatomic Fe-Cr binary alloy

Effect of Powder Particle Size on the Mechanical Properties of Boronized EN H320 LA Steel Sheets

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