High Cr-Ni Cast Iron Base Deposits with Tantalum Carbide Particles Produced by Plasma Spraying

Abstract:

Fe-C-Ta-Cr-Ni alloy powder in diameter of 32-53 μm made by argon atomization was low-pressure plasma sprayed to produce high Cr-Ni cast iron base deposits with finely dispersed tantalum carbide particles. The as-sprayed deposit formed on a water-cooled substrate consisted of γFe, αFe and carbide. The fine precipitates of approximately 0.1 μm in the as-sprayed deposit formed on a water-cooled substrate were carbide. With increasing heat treatment temperature up to 1273 K, the carbide particles coarsened. The hardness of deposit decreases with increasing heat treatment temperature. The wear resistance of as-sprayed deposit formed on a non-cooled substrate was higher than that of the deposit heat-treated at 1273 K. The as-sprayed deposit and deposit heat-treated at 1273 K hade higher wear resistance than a commercial stainless steel.

• Periodical: Materials Science Forum (Volume 782)
• Pages: 563-566
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.782.563
• Online since: April 2014
• Authors: Yasuhiro Hoshiyama*, Toshiaki Otani, Hidekazu Miyake
• Keywords: High Cr-Ni Cast Iron, Particle, Plasma Spray, Rapid Solidification, Tantalum Carbide

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