Journal
APPLIED SURFACE SCIENCE
Volume 255, Issue 20, Pages 8494-8500Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2009.05.161
Keywords
Laser induction hybrid rapid cladding (LIHRC); Laser specific energy; Powder density; Types of substrate; Composite coatings
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The relationships between the processing parameters (i.e. laser specific energy, powder density, preheated temperature of substrate and types of substrate) and the structure characteristics of Ni-based WC composite coatings during laser induction hybrid rapid cladding (LIHRC) were investigated systematically. The results show that laser specific energy, cladding height and contact angle have a linear relation with powder density, as can provide the predictions of laser processing parameters according to the geometrical characteristics of a single laser track (i.e. cladding height, cladding width). Moreover, dilution of composite coating increases with the increasing of laser specific energy and the preheated temperature of substrate, while reduces with the increasing of powder density. The types of substrate also have an important effect on dilution of composite coating, as has a strong dependence on the thermophysical properties of substrate (i.e. melting point, resistivity and permeability). (C) 2009 Elsevier B. V. All rights reserved.
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