Overlapping tracks processed by TIG melting TiC preplaced powder on low alloy steel surfaces
Mridha, Shahjahan and Baker, Neville (2015) Overlapping tracks processed by TIG melting TiC preplaced powder on low alloy steel surfaces. Materials Science and Technology, 31 (3). pp. 337-343. ISSN 0267-0836 (https://doi.org/10.1179/1743284714Y.0000000530)
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Abstract
An overlapping composite track coating was produced on a steel surface by preplacing an 0.5 mm thick layer of TiC powder and then melting using a TIG torch of constant energy input. The influence of the overlapping operation on preheating of the substrate, the dissolution of TiC particulates and the subsequent depth and hardness of the composite layer was analysed. The melt microstructure consisted of both undissolved and partially dissolved TiC particulates, together with a variety of morphologies and sizes of TiC particles precipitated during solidification. Preheating, resulting from the overlapping operation occurred, producing additional melting of the TiC particulates and deeper melt depths but with a reduced volume fraction of TiC precipitates in the subsequent tracks. A maximum hardness of over 800 Hv was developed in the composite layer. The high hardness was unevenly distributed in tracks melted at the initial and final stages, while it varied across the melt depths in other tracks.
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Item type: Article ID code: 47012 Dates: DateEventFebruary 2015Published21 March 2014Published Online24 February 2014AcceptedSubjects: Technology > Mechanical engineering and machinery
Technology > Mining engineering. MetallurgyDepartment: Faculty of Engineering > Mechanical and Aerospace Engineering Depositing user: Pure Administrator Date deposited: 28 Feb 2014 12:12 Last modified: 10 Oct 2024 00:20 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/47012