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Study on the (Fe,Cr)7C3 Particles Reinforced Iron-Based Composite Coating

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Abstract:

An iron based composite coating reinforced by (Fe,Cr) 7C3 particles, with a thickness of 4.0 mm, was fabricated on the ductile cast iron substrate by means of a centrifugal casting and in situ techniques. The microstructure and properties of the composite coatings were investigated by optical microscope, X-ray diffraction, scanning electron micrograph, energy dispersive spectrum, microhardness tester and pin-on-disc wear tester. Results show that the composite coatings consists of primary (Fe,Cr) 7C3 carbides as the reinforcing phase and interdendritic (Fe,Cr) 7C3/γ eutectics accompanied by negligible graphite nodules as the matrix. The reinforcements are metallurgical bonded to the ductile cast iron substrate. Compared with unreinforced ductile cast iron, the composite coatings offer virtually a unique wear resistant behaviour under the condition of dry sliding with loads.

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2014 China Functional Materials Technology and Industry Forum View Preview

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Periodical:

Materials Science Forum (Volumes 809-810)

Pages:

569-572

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.809-810.569

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Online since:

December 2014

Authors:

Li Bin Niu*, Zhen Xu, Jian Hong Peng

Keywords:

(Fe,Cr)7C3, Composite Coating, In Situ, Reinforcement

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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