Published July 20, 2012
| Version 5340
Journal article
Open
Temperature-Dependence of Hardness and Wear Resistance of Stellite Alloys
Description
A group of Stellite alloys are studied in consideration
of temperature effects on their hardness and wear resistance. The
hardness test is conducted on a micro-hardness tester with a hot stage
equipped that allows heating the specimen up to 650°C. The wear
resistance of each alloy is evaluated using a pin-on-disc tribometer
with a heating furnace built-in that provides the temperature capacity
up to 450°C. The experimental results demonstrate that the hardness
and wear resistance of Stellite alloys behave differently at room
temperature and at high temperatures. The wear resistance of Stellite
alloys at room temperature mainly depends on their carbon content and
also influenced by the tungsten content in the alloys. However, at high
temperatures the wear mechanisms of Stellite alloys become more
complex, involving multiple factors. The relationships between
chemical composition, microstructure, hardness and wear resistance of
these alloys are studied, with focus on temperature effect on these
relations.
Files
5340.pdf
Files
(1.8 MB)
| Name | Size | Download all |
|---|---|---|
|
md5:b37e7947ee7d2f3c3b1532bb4c25092d
|
1.8 MB | Preview Download |
Additional details
References
- J. R. Davis, Cobalt-base alloys, in Nickel, Cobalt, and Their Alloys, ASM International, Materials Park, 2000.
- K. Ando, T. Omori, J. Sato, Y. Sutou, K. Oikawa, R. Kainuma and K. Ishida, 2006, Effect of alloying elements on fcc/hcp martensitic transformation and shape memory properties in Co Al alloys, Mater. Trans., 47(9), 2006, 2381-2386.
- I. Campos, G. Ramirez, U. Figueroa and C. Velazquez, Paste bonding process: Evaluation of boron mobility on borided steels, Surf. Eng., 23(3), 2007, 216 222.
- A. Frenk and J. D. Wagnière, Laser cladding with cobalt-based hardfacing, J. Phys. IV France, 1(C7), 1991, 65-68.
- A. Frenk and W. Kurz, Microstructural effects on the sliding wear resistance of a cobalt based alloy, Wear, 174(1-2), 1994, 81-91.
- C. J. Heathcock, A. Ball and B. E. Protheroe, Cavitation erosion of cobalt-based Stellite alloys, cemented carbides and surface-treated low alloy steels, Wear, 74(1), 1981, 11 26.
- L. C. Wang and D. Y. Li, Effects of yttrium on microstructure, mechanical properties, high temperature wear behaviour of cast Stellite 6 alloy, Wear, 255(1-6), 2003, 535 544.
- I. Radu, D. Y. Li and R. Llewellyn, Tribologocal behaviour of Stellite 21 modified with yttrium, Wear, 257(11), 2004, 1154-1166.
- I. Radu and D. Y. Li, The wear performance of yttrium-modified Stellite 712 at elevated temperatures, Tribo. Inter., 40(2), 2007, 254-265. [10] H. Celik and M. Kaplan, Effects of silicon on the wear behaviour of cobalt-based alloys at elevated temperature, Wear, 257(5-6), 2004, 606-611.