Comparison of Microstructure and Mechanical Properties of Co-Based and Fe-Based Alloy Coatings Deposited by PTA

Ming Lou; Yu Xiang Xu; Hong Wu Ouyang; Yong Du

doi:10.4028/www.scientific.net/AMR.834-836.617

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 834-836Comparison of Microstructure and Mechanical...

Comparison of Microstructure and Mechanical Properties of Co-Based and Fe-Based Alloy Coatings Deposited by PTA

Abstract:

Stellite 6 Co-based and Hӧganӓs Fe-based alloy coatings were deposited on austenitic engine valve using plasma transferred arc (PTA) hardfacing. The microstructures, composition distribution and mechanical properties of coatings were investigated by combining optical microscope (OM), scanning electron microcopy (SEM), field emission electron-probe analyzer (EPMA) and nanoindentation technique. The microstructures of hardfacing coatings consist of three phases which belong to hypoeutectic structure and Co-based coating has more uniformed and regularly changed microstructure. The determination of mechanical properties reveals that Co-based coating attains higher hardness value (~5.229 GPa), H/E (0.0265) and H³/E*²(0.00323) than that of Fe-based coating, signified better wear resistance property.

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Periodical:

Advanced Materials Research (Volumes 834-836)

Pages:

617-622

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.834-836.617

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Online since:

October 2013

Authors:

Ming Lou, Yu Xiang Xu, Hong Wu Ouyang, Yong Du

Keywords:

Co-Based and Fe-Based Coatings, Mechanical Property, Microstructure, Plasma Transferred Arc Hardfacing

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