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 language | English |
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Pages (from-to) | 17-32 |
Number of pages | 16 |
Journal | Materials Science and Technology (United Kingdom) |
Volume | 36 |
Issue number | 1 |
Early online date | 31 Oct 2019 |
DOIs | |
Publication status | Published - 2 Jan 2020 |
Keywords
- surface engineering
- microalloyed steel
- silicon carbide particulates
- particle size
- TIG melting
- wear rate
- microhardness