The role of niobium in improving toughness and corrosion resistance of high speed steel laser hardfacings

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The role of niobium in improving toughness and corrosion resistance of high speed steel laser hardfacings. / Rodríguez Ripoll, Manel; Ojala, Niko; Katsich, Christian; Totolin, Vladimir; Tomastik, Christian; Hradil, Klaudia.

In: Materials and Design, Vol. 99, 05.06.2016, p. 509-520.

Research output: Contribution to journal › Article › Scientific › peer-review

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Rodríguez Ripoll, Manel ; Ojala, Niko ; Katsich, Christian ; Totolin, Vladimir ; Tomastik, Christian ; Hradil, Klaudia. / The role of niobium in improving toughness and corrosion resistance of high speed steel laser hardfacings. In: Materials and Design. 2016 ; Vol. 99. pp. 509-520.

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@article{a395d309641340aca72bc431ecc8d29a,

title = "The role of niobium in improving toughness and corrosion resistance of high speed steel laser hardfacings",

abstract = "Hardfacing by laser provides a cost-effective option for protecting components against mechanical wear and corrosion. In the present work, high speed steel hardfacings were deposited using a high-power direct diode laser with the aim of investigating the role of niobium content on their mechanical and corrosion properties. The content of niobium was varied between 0.1 and 3 wt{\%}. The results show that niobium content has a high impact on the hardfacing microstructure and its resulting mechanical properties. In particular, niobium is able to significantly enhance the abrasive wear resistance of high speed steel laser hardfacings. This improvement is accompanied by a superior corrosion resistance. The impact of niobium content on slurry erosion resistance is less remarkable and a clear benefit can only be achieved by microalloying. These results are correlated with the microstructural changes induced by the varying niobium content. An increase in niobium content reduces the amount of carbides found along the grain boundaries, raises the amount of chromium dissolved in the iron matrix and increases the elastic strain to failure of the hardfacing. This results as a consequence in high speed steel laser hardfacings with superior toughness and enhanced corrosion resistance.",

keywords = "Corrosion, High speed steel, Niobium, Toughness, Wear",

author = "{Rodr{\'i}guez Ripoll}, Manel and Niko Ojala and Christian Katsich and Vladimir Totolin and Christian Tomastik and Klaudia Hradil",

year = "2016",

month = "6",

day = "5",

doi = "10.1016/j.matdes.2016.03.081",

language = "English",

volume = "99",

pages = "509--520",

journal = "Materials and Design",

issn = "0264-1275",

publisher = "Elsevier",

}

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TY - JOUR

T1 - The role of niobium in improving toughness and corrosion resistance of high speed steel laser hardfacings

AU - Rodríguez Ripoll, Manel

AU - Ojala, Niko

AU - Katsich, Christian

AU - Totolin, Vladimir

AU - Tomastik, Christian

AU - Hradil, Klaudia

PY - 2016/6/5

Y1 - 2016/6/5

N2 - Hardfacing by laser provides a cost-effective option for protecting components against mechanical wear and corrosion. In the present work, high speed steel hardfacings were deposited using a high-power direct diode laser with the aim of investigating the role of niobium content on their mechanical and corrosion properties. The content of niobium was varied between 0.1 and 3 wt%. The results show that niobium content has a high impact on the hardfacing microstructure and its resulting mechanical properties. In particular, niobium is able to significantly enhance the abrasive wear resistance of high speed steel laser hardfacings. This improvement is accompanied by a superior corrosion resistance. The impact of niobium content on slurry erosion resistance is less remarkable and a clear benefit can only be achieved by microalloying. These results are correlated with the microstructural changes induced by the varying niobium content. An increase in niobium content reduces the amount of carbides found along the grain boundaries, raises the amount of chromium dissolved in the iron matrix and increases the elastic strain to failure of the hardfacing. This results as a consequence in high speed steel laser hardfacings with superior toughness and enhanced corrosion resistance.

AB - Hardfacing by laser provides a cost-effective option for protecting components against mechanical wear and corrosion. In the present work, high speed steel hardfacings were deposited using a high-power direct diode laser with the aim of investigating the role of niobium content on their mechanical and corrosion properties. The content of niobium was varied between 0.1 and 3 wt%. The results show that niobium content has a high impact on the hardfacing microstructure and its resulting mechanical properties. In particular, niobium is able to significantly enhance the abrasive wear resistance of high speed steel laser hardfacings. This improvement is accompanied by a superior corrosion resistance. The impact of niobium content on slurry erosion resistance is less remarkable and a clear benefit can only be achieved by microalloying. These results are correlated with the microstructural changes induced by the varying niobium content. An increase in niobium content reduces the amount of carbides found along the grain boundaries, raises the amount of chromium dissolved in the iron matrix and increases the elastic strain to failure of the hardfacing. This results as a consequence in high speed steel laser hardfacings with superior toughness and enhanced corrosion resistance.

KW - Corrosion

KW - High speed steel

KW - Niobium

KW - Toughness

KW - Wear

U2 - 10.1016/j.matdes.2016.03.081

DO - 10.1016/j.matdes.2016.03.081

M3 - Article

VL - 99

SP - 509

EP - 520

JO - Materials and Design

JF - Materials and Design

SN - 0264-1275

ER -

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