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

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

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 µm 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, 420Jmm-1 and 840 Jmm-1,compared. The results showed that the samples melted using 420Jmm-1 were crack-free. Pin-on-disk wear testing under dry sliding conditions were 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
JournalMaterials Science and Technology (United Kingdom)
Publication statusAccepted/In press - 30 Sep 2019

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Keywords

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

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