Silicon carbide particulates incorporated into microalloyed steel surface using TIG: microstructure and properties

P. Muñoz-Escalona, F. Sillars, T. Marrocco, R. Edgar, S. Mridha, T.N. Baker*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Surface metal matrix composites have been developed to enhance properties such as erosion, wear and corrosion of alloys. In this study, ∼5 µm or ∼75 SiC particulates were preplaced on a microalloyed steel. Single track surface zones were melted by a tungsten inert gas torch, and the effect of two heat inputs, 420 and 840 J mm−1, compared. The results showed that the samples melted using 420 J mm−1 were crack-free. Pin-on-disk wear testing under dry sliding conditions was conducted. The effects of load and sliding velocity were used to characterise the performance of the crack-free samples. Microstructural and X-ray diffraction studies of the surface showed that the SiC had dissolved, and that martensite, was the main phase influencing the hardness.
Original languageEnglish
Pages (from-to)17-32
Number of pages16
JournalMaterials Science and Technology
Volume36
Issue number1
Early online date31 Oct 2019
DOIs
Publication statusPublished - 2 Jan 2020

Keywords

  • surface engineering
  • microalloyed steel
  • silicon carbide particulates
  • particle size
  • TIG melting
  • wear rate
  • microhardness

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