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Incorporation of TiC on Alsi 4340 low alloy steel surfaces via tungsten inert gas arc melting

Mridha, Shahjahan and Idriss, A.N. and Baker, Thomas (2012) Incorporation of TiC on Alsi 4340 low alloy steel surfaces via tungsten inert gas arc melting. Advanced Materials Research, 445. pp. 655-660. ISSN 1022-6680

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    Abstract

    Surface cladding utilizes a high energy input to deposit a layer on substrate surfaces providing protection against wear and corrosion. In this work, TiC particulates were incorporated by melting single tracks in powder preplaced onto AISI 4340 low alloy steel surfaces using a Tungsten Inert Gas (TIG) torch with a range of processing conditions. The effects of energy input and powder content on the melt geometry, microstructure and hardness were investigated. The highest energy input (1680 J/mm) under the TIG torch produced deeper (1.0 mm) and wider melt pools, associated with increased dilution, compared to that processed at the lowest energy (1008J/mm). The melt microstructure contained partially melted TiC particulates associated with dendritic, cubic and globular type carbides precipitated upon solidification of TiC dissolved in the melt; TiC accumulated more near to the melt-matrix interface and at the track edges. Addition of 0.4, 0.5 and 1.0 mg/mm2 TiC gave hardness values in the resolidified melt pools between 750 to over 1100Hv, against a base hardness of 300 Hv; hardness values are higher in tracks processed with a greater TiC addition and reduced energy input.

    Item type: Article
    ID code: 40882
    Keywords: low alloy steel, TIG torch, TiC powder, surface layer, microstructure, melt depth, hardness, Mechanical engineering and machinery, Mining engineering. Metallurgy, Mechanical Engineering, Mechanics of Materials, Metals and Alloys
    Subjects: Technology > Mechanical engineering and machinery
    Technology > Mining engineering. Metallurgy
    Department: Faculty of Engineering > Mechanical and Aerospace Engineering
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    Depositing user: Pure Administrator
    Date Deposited: 14 Aug 2012 14:51
    Last modified: 27 Mar 2014 20:56
    URI: http://strathprints.strath.ac.uk/id/eprint/40882

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