A General Process for In Situ Formation of Iron-Matrix Composites Reinforced by Carbide Ceramic

Abstract:

Ceramic particles (such as VC, NbC, TiC, and WC), which exhibit high hardness and thermal stability, can be used for in situ fabrication of carbide-reinforced iron matrix composites with high macro-hardness and toughness. In this study, we describe a novel in situ process comprising infiltration casting and heat treatment to form carbide-reinforced iron matrix composites with hard ceramic particles. Our proposed approach was used to integrate different alloy wires, which can easily form carbides, into the metal matrix and cast a known amount of carbon, such as gray cast iron, ductile cast iron, or ordinary white cast iron, to form alloy-reinforced iron matrix composites. Thermal treatment of the resulting composites allowed the alloy elements of the wire to react with carbon in the matrix to form evenly distributed carbide particles. This approach can be applied to a wide range of materials with different morphologies for fabricating composites, machining tools, and wear-resistant components.

• Periodical: Materials Science Forum (Volume 852)
• Pages: 461-466
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.852.461
• Online since: April 2016
• Authors: Xin Wang, Li Sheng Zhong, Na Na Zhao, Vladimir E. Ovcharenko, Yun Hua Xu
• Keywords: Carbide Particles, Casting, Composite Materials, In Situ

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