WIT Press


Thickness And Waviness Of Surface Coatings Formed By Overlap: Modelling And Experiment

Price

Free (open access)

Paper DOI

10.2495/SECM130111

Volume

78

Pages

10

Page Range

135 - 144

Published

2013

Size

346 kb

Author(s)

V. Ocelík, O. Nenadl, I. Hemmati & J. Th. M. De Hosson

Abstract

Several surface engineering techniques are known that form a hard facing coating on an inexpensive substrate by a successive overlap of individual cladding tracks. Typical examples include laser cladding and laser additive manufacturing. Realistic predicting the final thickness and waviness of the coating as a function of geometry of single cladding track and their overlap are lacking in literature. In this contribution a recursive model for the calculation of the coating profile is presented. A few basic shapes of single tracks are presumed and on the basis of physical assumptions a recursive formula is deduced to construct a shape of the whole coating profile. Calculations of such profiles for different shapes of tracks and different overlaps show a dependence of the coating thickness and its waviness on these parameters. The model is tested experimentally for a laser cladding process, in which the laser track is formed by a continuous deposition of small metallic particles into the meltpool formed by a high power laser beam continuously moving over the substrate. Keywords: surface coatings, overlap, thick coatings, laser cladding.

Keywords

Keywords: surface coatings, overlap, thick coatings, laser cladding.