Developing bearing steels combining hydrogen resistance and improved hardness

School of Engineering

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https://doi.org/10.1016/j.matdes.2012.07.030
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Keywords

Hydrogen embrittlement, Nanostructured materials, Precipitation, Steel

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Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Developing bearing steels combining hydrogen resistance and improved hardness. / Szost, B. A.; Vegter, R. H.; Rivera-Díaz-del-Castillo, P. E J.
In: Materials and Design, Vol. 43, 2013, p. 499-506.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Bibtex

@article{701266ace4ee4b11bfaef3cd29c21f5d,

title = "Developing bearing steels combining hydrogen resistance and improved hardness",

abstract = "Thermodynamic and kinetic computational modelling are combined to conceive a hydrogen resistant bearing steel. Existing hydrogen resistant steels are not appropriate for bearings due to their low hardness. The proposed microstructure combines a martensitic matrix in which fine cementite precipitates impart strength, and V4C3 nano-scaled particles acting as hydrogen traps. It is demonstrated that the conflicting objectives of ultra-hardness and hydrogen resistance can be concealed by: (1) Adding 0.5wt.% V to 100Cr6, which allows to preserve existing steel production technology. (2) Following a novel heat treatment procedure consisting of austenitisation (and a subsequent temperature spike to dissolve coarse V4C3), followed by tempering at 600°C where V4C3 particles form (and a subsequent temperature spike to dissolve coarse cementite), followed by quench and tempering at 215°C, where fine cementite strengthening particles form. The enhanced trapping capacity of the new steel is demonstrated via thermal desorption; the presence of the desired microstructure after heat treatment is proved via transmission electron microscopy. Concomitant with the trapping ability, a significant hardness increase was observed; this was ascribed to the controlled V4C3 precipitation.",

keywords = "Hydrogen embrittlement, Nanostructured materials, Precipitation, Steel",

author = "Szost, {B. A.} and Vegter, {R. H.} and Rivera-D{\'i}az-del-Castillo, {P. E J}",

year = "2013",

doi = "10.1016/j.matdes.2012.07.030",

language = "English",

volume = "43",

pages = "499--506",

journal = "Materials and Design",

issn = "0261-3069",

publisher = "Elsevier Ltd",

}

RIS

TY - JOUR

T1 - Developing bearing steels combining hydrogen resistance and improved hardness

AU - Szost, B. A.

AU - Vegter, R. H.

AU - Rivera-Díaz-del-Castillo, P. E J

PY - 2013

Y1 - 2013

N2 - Thermodynamic and kinetic computational modelling are combined to conceive a hydrogen resistant bearing steel. Existing hydrogen resistant steels are not appropriate for bearings due to their low hardness. The proposed microstructure combines a martensitic matrix in which fine cementite precipitates impart strength, and V4C3 nano-scaled particles acting as hydrogen traps. It is demonstrated that the conflicting objectives of ultra-hardness and hydrogen resistance can be concealed by: (1) Adding 0.5wt.% V to 100Cr6, which allows to preserve existing steel production technology. (2) Following a novel heat treatment procedure consisting of austenitisation (and a subsequent temperature spike to dissolve coarse V4C3), followed by tempering at 600°C where V4C3 particles form (and a subsequent temperature spike to dissolve coarse cementite), followed by quench and tempering at 215°C, where fine cementite strengthening particles form. The enhanced trapping capacity of the new steel is demonstrated via thermal desorption; the presence of the desired microstructure after heat treatment is proved via transmission electron microscopy. Concomitant with the trapping ability, a significant hardness increase was observed; this was ascribed to the controlled V4C3 precipitation.

AB - Thermodynamic and kinetic computational modelling are combined to conceive a hydrogen resistant bearing steel. Existing hydrogen resistant steels are not appropriate for bearings due to their low hardness. The proposed microstructure combines a martensitic matrix in which fine cementite precipitates impart strength, and V4C3 nano-scaled particles acting as hydrogen traps. It is demonstrated that the conflicting objectives of ultra-hardness and hydrogen resistance can be concealed by: (1) Adding 0.5wt.% V to 100Cr6, which allows to preserve existing steel production technology. (2) Following a novel heat treatment procedure consisting of austenitisation (and a subsequent temperature spike to dissolve coarse V4C3), followed by tempering at 600°C where V4C3 particles form (and a subsequent temperature spike to dissolve coarse cementite), followed by quench and tempering at 215°C, where fine cementite strengthening particles form. The enhanced trapping capacity of the new steel is demonstrated via thermal desorption; the presence of the desired microstructure after heat treatment is proved via transmission electron microscopy. Concomitant with the trapping ability, a significant hardness increase was observed; this was ascribed to the controlled V4C3 precipitation.

KW - Hydrogen embrittlement

KW - Nanostructured materials

KW - Precipitation

KW - Steel

U2 - 10.1016/j.matdes.2012.07.030

DO - 10.1016/j.matdes.2012.07.030

M3 - Journal article

AN - SCOPUS:84866391696

VL - 43

SP - 499

EP - 506

JO - Materials and Design

JF - Materials and Design

SN - 0261-3069

ER -

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