Influence of Thermite Reaction on the Microstructures and Properties of Cast-Infiltration Composite Layer

Abstract:

Using the steel containing 0.45 percent of carbon as matrix, high carbon ferrochrome as cast-penetrated agent, the steel-based surface composites were fabricated by conventional cast-penetrating process combined with the thermite reaction. The influence of thermite reaction on the microstructures and properties of cast-infiltration layer was researched. The results show that the interfacial bonding is metallurgical fusion between cast-infiltration layer and the matrix under the suitable technological parameters, the thermite reaction during the process of cast-penetrated realizes thermal compensation for liquid metal and improves the mobility of liquid steel by reducing oxidation film of liquid steel surface, consequently increase the thickness of cast-infiltration layer; The ceramic phase of Al2O3 which is generated during the thermite process improves the microhardness of cast-infiltration in a certain extent.

• Periodical: Advanced Materials Research (Volumes 602-604)
• Pages: 18-22
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.602-604.18
• Online since: December 2012
• Authors: Yan Yan Ren, Guo Shang Zhang, Shi Zhong Wei, Ji Wen Li, Liu Jie Xu
• Keywords: Cast-Infiltration, Microstructures and Properties, Thermite Reaction, Thickness

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