Development and characterization of multilayer laser cladded high speed steels

N. Ur Rahman* (Corresponding Author), L. Capuano, A. van der Meer, M. B. de Rooij, D. T.A. Matthews, G. Walmag, M. Sinnaeve, A. Garcia-Junceda, M. Castillo, G. R.B.E. Römer

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    5 Citations (Scopus)
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    Abstract

    Two high speed steel (HSS) alloys were laser cladded on 42CrMo4 steel cylindrical substrate by using a 4 kW Nd:YAG laser source. After optimization of the laser material processing parameters for single layers, multilayered clads were produced. Microstructural characterization of the laser deposits constitutes studies of the carbides and matrix, which was done by using Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), Electron Backscattered Diffraction (EBSD) and High Resolution Transmission Electron Microscopy (HRTEM). The strengthening mechanism of LC1 (Fe-Cr-Mo-W-V) was comprised of a martensitic matrix and retained austenite along with networks of VC and Mo2C eutectic carbides. Cr enriched fine carbides (Cr7C3 and Cr23C6) were embedded within the matrix. During laser cladding of the multilayer deposits, cladding of subsequent layers had a detrimental effect on the hardness of previously cladded layers, which was due to tempering of existing lath martensite. To overcome the hardness drop, a new alloy LC2 (Febal−x-Cr-Mo-W-V-Cox) was blended by addition of 3–5% of Co in LC1. The addition of Co resulted in an overall increase in hardness and a reduction in the hardness drop during sequential layer cladding; the latter was due to the presence of Co in the solid solution with Fe. HRTEM was performed to characterize the nanometer-sized precipitates evolved during the re-heating. These carbides were either enriched with V and W or formed from a complex combination of V, Mo, W and Cr with lattice spacings of 0.15 nm to 0.26 nm.

    Original languageEnglish
    Pages (from-to)76-85
    Number of pages10
    JournalAddItive manufacturing
    Volume24
    DOIs
    Publication statusPublished - 1 Dec 2018

    Fingerprint

    Steel
    Carbides
    Multilayers
    Hardness
    Lasers
    High resolution transmission electron microscopy
    Deposits
    Laser materials processing
    Laser cladding
    Alloy steel
    Tempering
    Martensite
    Electron diffraction
    Austenite
    Eutectics
    Precipitates
    Energy dispersive spectroscopy
    Solid solutions
    Heating
    Scanning electron microscopy

    Keywords

    • Complex nanometer-sized carbides
    • Compressive residual stress
    • Crack propagation
    • High speed steel
    • Laser cladding

    Cite this

    Ur Rahman, N. ; Capuano, L. ; van der Meer, A. ; de Rooij, M. B. ; Matthews, D. T.A. ; Walmag, G. ; Sinnaeve, M. ; Garcia-Junceda, A. ; Castillo, M. ; Römer, G. R.B.E. / Development and characterization of multilayer laser cladded high speed steels. In: AddItive manufacturing. 2018 ; Vol. 24. pp. 76-85.
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    abstract = "Two high speed steel (HSS) alloys were laser cladded on 42CrMo4 steel cylindrical substrate by using a 4 kW Nd:YAG laser source. After optimization of the laser material processing parameters for single layers, multilayered clads were produced. Microstructural characterization of the laser deposits constitutes studies of the carbides and matrix, which was done by using Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), Electron Backscattered Diffraction (EBSD) and High Resolution Transmission Electron Microscopy (HRTEM). The strengthening mechanism of LC1 (Fe-Cr-Mo-W-V) was comprised of a martensitic matrix and retained austenite along with networks of VC and Mo2C eutectic carbides. Cr enriched fine carbides (Cr7C3 and Cr23C6) were embedded within the matrix. During laser cladding of the multilayer deposits, cladding of subsequent layers had a detrimental effect on the hardness of previously cladded layers, which was due to tempering of existing lath martensite. To overcome the hardness drop, a new alloy LC2 (Febal−x-Cr-Mo-W-V-Cox) was blended by addition of 3–5{\%} of Co in LC1. The addition of Co resulted in an overall increase in hardness and a reduction in the hardness drop during sequential layer cladding; the latter was due to the presence of Co in the solid solution with Fe. HRTEM was performed to characterize the nanometer-sized precipitates evolved during the re-heating. These carbides were either enriched with V and W or formed from a complex combination of V, Mo, W and Cr with lattice spacings of 0.15 nm to 0.26 nm.",
    keywords = "Complex nanometer-sized carbides, Compressive residual stress, Crack propagation, High speed steel, Laser cladding",
    author = "{Ur Rahman}, N. and L. Capuano and {van der Meer}, A. and {de Rooij}, {M. B.} and Matthews, {D. T.A.} and G. Walmag and M. Sinnaeve and A. Garcia-Junceda and M. Castillo and R{\"o}mer, {G. R.B.E.}",
    year = "2018",
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    Development and characterization of multilayer laser cladded high speed steels. / Ur Rahman, N. (Corresponding Author); Capuano, L.; van der Meer, A.; de Rooij, M. B.; Matthews, D. T.A.; Walmag, G.; Sinnaeve, M.; Garcia-Junceda, A.; Castillo, M.; Römer, G. R.B.E.

    In: AddItive manufacturing, Vol. 24, 01.12.2018, p. 76-85.

    Research output: Contribution to journalArticleAcademicpeer-review

    TY - JOUR

    T1 - Development and characterization of multilayer laser cladded high speed steels

    AU - Ur Rahman, N.

    AU - Capuano, L.

    AU - van der Meer, A.

    AU - de Rooij, M. B.

    AU - Matthews, D. T.A.

    AU - Walmag, G.

    AU - Sinnaeve, M.

    AU - Garcia-Junceda, A.

    AU - Castillo, M.

    AU - Römer, G. R.B.E.

    PY - 2018/12/1

    Y1 - 2018/12/1

    N2 - Two high speed steel (HSS) alloys were laser cladded on 42CrMo4 steel cylindrical substrate by using a 4 kW Nd:YAG laser source. After optimization of the laser material processing parameters for single layers, multilayered clads were produced. Microstructural characterization of the laser deposits constitutes studies of the carbides and matrix, which was done by using Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), Electron Backscattered Diffraction (EBSD) and High Resolution Transmission Electron Microscopy (HRTEM). The strengthening mechanism of LC1 (Fe-Cr-Mo-W-V) was comprised of a martensitic matrix and retained austenite along with networks of VC and Mo2C eutectic carbides. Cr enriched fine carbides (Cr7C3 and Cr23C6) were embedded within the matrix. During laser cladding of the multilayer deposits, cladding of subsequent layers had a detrimental effect on the hardness of previously cladded layers, which was due to tempering of existing lath martensite. To overcome the hardness drop, a new alloy LC2 (Febal−x-Cr-Mo-W-V-Cox) was blended by addition of 3–5% of Co in LC1. The addition of Co resulted in an overall increase in hardness and a reduction in the hardness drop during sequential layer cladding; the latter was due to the presence of Co in the solid solution with Fe. HRTEM was performed to characterize the nanometer-sized precipitates evolved during the re-heating. These carbides were either enriched with V and W or formed from a complex combination of V, Mo, W and Cr with lattice spacings of 0.15 nm to 0.26 nm.

    AB - Two high speed steel (HSS) alloys were laser cladded on 42CrMo4 steel cylindrical substrate by using a 4 kW Nd:YAG laser source. After optimization of the laser material processing parameters for single layers, multilayered clads were produced. Microstructural characterization of the laser deposits constitutes studies of the carbides and matrix, which was done by using Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), Electron Backscattered Diffraction (EBSD) and High Resolution Transmission Electron Microscopy (HRTEM). The strengthening mechanism of LC1 (Fe-Cr-Mo-W-V) was comprised of a martensitic matrix and retained austenite along with networks of VC and Mo2C eutectic carbides. Cr enriched fine carbides (Cr7C3 and Cr23C6) were embedded within the matrix. During laser cladding of the multilayer deposits, cladding of subsequent layers had a detrimental effect on the hardness of previously cladded layers, which was due to tempering of existing lath martensite. To overcome the hardness drop, a new alloy LC2 (Febal−x-Cr-Mo-W-V-Cox) was blended by addition of 3–5% of Co in LC1. The addition of Co resulted in an overall increase in hardness and a reduction in the hardness drop during sequential layer cladding; the latter was due to the presence of Co in the solid solution with Fe. HRTEM was performed to characterize the nanometer-sized precipitates evolved during the re-heating. These carbides were either enriched with V and W or formed from a complex combination of V, Mo, W and Cr with lattice spacings of 0.15 nm to 0.26 nm.

    KW - Complex nanometer-sized carbides

    KW - Compressive residual stress

    KW - Crack propagation

    KW - High speed steel

    KW - Laser cladding

    U2 - 10.1016/j.addma.2018.09.009

    DO - 10.1016/j.addma.2018.09.009

    M3 - Article

    AN - SCOPUS:85053500543

    VL - 24

    SP - 76

    EP - 85

    JO - AddItive manufacturing

    JF - AddItive manufacturing

    SN - 2214-8604

    ER -