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Effects of Processing Parameters on the Laser Deposited Co-285 + WC Coatings

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Abstract:

Laser-aided direct metal deposition (LADMD) technique was used to fabricate Co-285+WC coatings on 1018 mild steels. The effects of the processing parameters (laser power P, addition amount of WC, scanning speed V) on the microhardness of the deposited coatings was analyzed. Results indicate that the microhardness of the matrix and the Rockwell hardness of the deposited coatings increases with the addition of WC and the P/V value. The addition amount of WC has the most important effect on the two hardness values, followed by the scanning speed and the laser power. Results of the optimized specimen in this study indicate that the deposited coating is composed of undissolved WC, dendrites, eutectics and the coral structures. The wear mechanism of the deposited coating is a mixture of abrasive, adhesive and oxidation wear.

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Periodical:

Key Engineering Materials (Volume 464)

Pages:

568-571

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.464.568

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Online since:

January 2011

Authors:

Gui Fang Sun, Rui Zhou, Peng Li, Yong Kang Zhang

Keywords:

Co-285 Superalloy, Laser-Aided Direct Metal Deposition, Microhardness, Sliding Wear Resistance

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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