Manufacturing Technology 2017, 17(6):919-925 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/6/919

Surface Machining after Deposition of Wear Resistant Hard Coats by High Velocity Oxygen Fuel Technology

Katarina Monkova1, Peter Monka1,2, Jan Matejka2, Martin Novak3, Jiri Cesanek2, Vladimir Duchek2, Marek Urban2
1 Technical University of Kosice, Faculty of Manufacturing Technologies with the seat in Presov, Sturova 31, 080 01 Presov, Slovakia
2 Faculty of Mechanical Engineering, University of West Bohemia, Univerzitni 8, 306 14 Pilsen, Czech Republic
3 Faculty of Mechanical Engineering, J. E. Purkynì University in Ústí nad Labem, Pasteurova 3334/7, 400 96 Ústí nad Labem, Czech Republic

The article deals with some aspects related to the machining of surfaces that have been deposited by wear-resistant hard coats using HVOF (high velocity oxygen fuel) technology. HVOF coating is a thermal spray process used to improve a component's surface properties, thus extending equipment life by significantly increasing errosion and wear resistance, along with corrosion protection. For a purpose of this research, the chromium-cobalt alloy - Stellite 6 was used as a sprayed material. Considering that the parts made of stellites are widely used in various industries and very popular in specific applications, it is a big drawback that adequate machining processes for stellites have not yet been developed other than the costly and time-consuming technique of grinding. However, in this research, an attempt has been made to reveal the optimal machining parameters for a lower value of surface roughness for the purpose of successful machining of Stellite 6 using inserts with various radii of cutting edge. Authors have evaluated the quality of machined surface not only by means of Abbott curve, but they have also observed the dependency of arithmetical mean roughness value on both cutting-edge radius and feed. The analyses of cutting tips wear at changeable inserts have shown that typical wear appears in the form of a notch.

Keywords: Hard coats, High velocity oxygen fuel, Surface quality, Cutting tip, Wear

Published: December 1, 2017  Show citation

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Monkova K, Monka P, Matejka J, Novak M, Cesanek J, Duchek V, Urban M. Surface Machining after Deposition of Wear Resistant Hard Coats by High Velocity Oxygen Fuel Technology. Manufacturing Technology. 2017;17(6):919-925. doi: 10.21062/ujep/x.2017/a/1213-2489/MT/17/6/919.
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