The importance of carbon content beneath iron borides after boriding of chromium and nickel-based low-carbon steel

Kulka, Michał; Pertek, A.

doi:10.1016/s0169-4332(03)00303-9

Cited by 52 publications

(26 citation statements)

References 9 publications

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“…Therefore, it is moved into the substrate and forms a "carbide excess" in the transition areas, in high carbon steels in particular. The "carbide excess" is known from some investigations published previously [4], however, no relevant information on the nature of carbides was published yet. It should be noticed that the identification of the carbides is relatively difficult.…”

Section: Introductionmentioning

confidence: 99%

“…The thickest layers are formed on low carbon steels. Increasing carbon content leads to decrease of the layer thickness [4]. Also, according to Campos [5], chromium inhibits the layer growth.…”

Section: Introductionmentioning

confidence: 99%

“…Higher carbon content promotes alterations of the interface morphology. Kulka and Pertek [4], for instance, reported that in pre-carburized low carbon steels, the borides lost the "sawtooth" morphology and the interface became weak. Also for other high carbon cold work tool steels, similar phenomena were observed [9,10].…”

Section: Introductionmentioning

confidence: 99%

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Nature of phases in boronized H11 hot work tool steel

Jurči¹,

Hudáková²,

Kusý³

2012

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The H11 hot work tool steel was short-time boronized, austenitized, quenched and tempered to a standard core hardness of 47-48 HRC. Microstructure, phase constitution and microhardness of boronized layers were investigated. It was found that the boronizing begins with the formation of α-solid solution, enriched with boron, and continues with the development of firstly the Fe2B-boride compound and finally with the FeB-phase. During the boronizing, carbon atoms are transported from the surface towards the parent material. They are accumulated in a narrow intermediate region beneath the borides, where they develop new carbides. These carbides were identified as M23C6. Their portion probably increases with prolonged boronizing time, which is reflected in higher hardness of intermediate region. Also the hardness of boron compounds was found to be increased slightly with longer processing time.K e y w o r d s : powder boronizing, H11 hot work tool steel, microstructure, phase constitution, borides, carbides

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nature of phases in boronized H11 hot work tool steel

Jurči¹,

Hudáková²,

Kusý³

2012

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“…Recently, surface coatings with interesting properties have been produced by boriding previously carburized or nitrided steels [3].…”

mentioning

confidence: 99%

“…alloys with Ni contents up to around 10 wt.% [3][4][5][6]. It has been reported that the growth is controlled by inward diffusion of B which, moving preferentially along a [001] direction through both FeB and Fe 2 B lattices, gives rise to ragged FeB-Fe 2 B and Fe 2 B-Fe interfaces.…”

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confidence: 99%

Formation and characterization of boride coatings thermochemically grown on the Fe64Ni36 alloy

et al. 2009

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Boride coatings were grown on Armco iron and Fe 64 Ni 36 alloy at 850 • C for 20 min and 1 h, using a high boron potential powder constituted by KBF 4 -activated amorphous boron. The coatings were characterized by X-ray diffraction, Mössbauer spectroscopy and metallographic techniques. The use of high boron potential media allows iron borides to form with high Ni contents because of a considerable reduction of the selective reactivity of boron towards Fe and Ni. As a consequence of the isomorphism between Fe 2 B and Ni 2 B and between FeB and NiB, the high amounts of Ni in iron borides do not significantly modify the XRD patterns, while they give rise to remarkable variations in the hyperfine parameters.

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The influence of the tempering temperature on hydrogen embrittlement in carbonitrided modified SAE 10B22 steel

Brandolt

Gonçalves

Savaris

et al. 2015

Materials & Corrosion

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The modified SAE 10B22 steel has high hardenability, which provides its use in special engineering applications, such as in self-drilling screws, with carbonitrided layer, quenched and tempered. However, these components are susceptible to hydrogen embrittlement, which can cause damage to structural components. In addition, the study of the behavior regarding to hydrogen embrittlement of components with carbonitrided layer has not been done hitherto. In this work the tempering temperature influence on hydrogen embrittlement of modified SAE 10B22 steel, was evaluated after a carbonitriding process. Standard samples and M4 Â 50 screws were tested. A galvanostatic circuit was used for hydrogen charging of the samples, which were characterized by low-strain tensile test and the samples fracture were analyzed by SEM. The obtained results demonstrate that by lowering tempering temperatures, the hydrogen-loaded samples presented a greater loss of mechanical properties and greater changes of the micromechanics of fracture. In addition, the geometry of the screw was more prone to the deleterious effects of the hydrogen charging than the conventional specimens.

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The importance of carbon content beneath iron borides after boriding of chromium and nickel-based low-carbon steel

Cited by 52 publications

References 9 publications

Nature of phases in boronized H11 hot work tool steel

Nature of phases in boronized H11 hot work tool steel

Formation and characterization of boride coatings thermochemically grown on the Fe64Ni36 alloy

The influence of the tempering temperature on hydrogen embrittlement in carbonitrided modified SAE 10B22 steel

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