Journal
SURFACE & COATINGS TECHNOLOGY
Volume 202, Issue 15, Pages 3494-3500Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2007.12.026
Keywords
thermal spraying; HVOF; multicomponent white cast iron; porosity; hardness
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High velocity oxi-fuel (HVOF) thermal spray process has been used in order to deposit a new alloy known as multicomponent white cast iron. The coatings were characterized in terms of macrostructure, phase composition, porosity and hardness. Coating characteristics and properties were found to be dependent on the particles size range, spray distance, gases flow rate and oxygen to propane ratio. For set of parameters utilized in this job a narrow particle size range between 20 and 45 gm with a spray distance of 200 mm and oxygen to propane ratio of 4.6 are the preferred coating parameters. Coating porosity of 0.9% and hardness of 766 HV were obtained under these conditions. (c) 2007 Elsevier B.V. All rights reserved.
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