Melting of multipass surface tracks in steel incorporating titanium carbide powders

Shahjahan Mridha, A.N. Idriss, M.A. Maleque, I.L. Jaacob, Neville Baker

Research output: Contribution to journalArticle

14 Citations (Scopus)
167 Downloads (Pure)

Abstract

Overlapping tracks were processed by melting preplaced titanium carbide (TiC) powder on steel surfaces using a tungsten inert gas torch. The tracks produced ~1.0 mm melt depth free from cracks, but occasional pores were observed. The microstructure consisted of unmelted and partially melted TiC particulates together with reprecipitated TiC particles, which were prominent in tracks processed in the initial stage. A greater number of reprecipitated globular and cubic TiC particles were observed in tracks processed in the later stages, indicating more dissolution of TiC particulates from the overlapping operation. Those multitracks processed in the initial stage developed a maximum hardness of 850-1000 HV, which was lower in most other tracks, although comparable hardness values were recorded in the last track.
Original languageEnglish
Pages (from-to)1362-1369
Number of pages8
JournalMaterials Science and Technology
Volume31
Issue number11
Early online date20 Nov 2014
DOIs
Publication statusPublished - Aug 2015

Keywords

  • steel
  • welding torch melting
  • composites
  • coating
  • overlapping
  • microstructure
  • hardness

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