MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Tribology Property of Laser Cladding Crack Free Ni/WC Composite Coating
Hu ChengJian YiZhigang FangSheng DaiXianrui Zhao
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2013 Volume 54 Issue 1 Pages 50-55

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Abstract

In order to improve wear resistance, the Ni/WC composite coating was prepared on NAK80 mold steel surface by laser cladding technology. Phase and microstructure had been investigated by scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS) and X-ray diffraction (XRD). Dry sliding tribological properties at room temperature of the coating had been researched by ball-on-disc wear tests. Results indicated that phase constituents of the coating were mainly composed of WC, W2C, Cr23C6, NiCr, CrB2 and γ-Ni, etc. There was a chemical metallurgical bonding between the coating and the steel substrate. Higher wear resistance of NAK80 mold steel was achieved after cladded by the Ni/WC composite coating, which was mainly related to dendrite phases Cr23C6 and hard phases WC, W2C dispersing in the coating.

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© 2012 The Japan Institute of Metals and Materials
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