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Proceedings Paper

Moldless casting by laser
Author(s): Marc A. McLean; G. J. Shannon; William M. Steen
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Paper Abstract

The principle of laser cladding involves the use of high power carbon-dioxide lasers and powder deposition technology to provide wear and corrosion resistant surface coatings to engineering components. By injecting metal powder into a laser generated melt pool on a moving substrate a solidified metal track can be produced. Deposition of successive tracks produces a multi-layer build. Laser direct casting (LDC) utilizes a coaxial nozzle enabling consistent omnidirectional deposition to produce 3D components from a selection of metal powders. The influence of the principal process parameters over the process features namely, powder catchment efficiency, beam shape and build rates are presented with several successfully generated 3D components. Nickel, stainless steel and satellite powders were deposited at laser powders of 0.4 to 1.4 kW and speeds of 500 to 1000 mm/min achieving build rates of 3 to 9 mm3/s. Fully dense metallurgical structures have been produced with no cracking or porosity and powder catchment efficiencies up to 85% have been achieved.

Paper Details

Date Published: 25 September 1997
PDF: 11 pages
Proc. SPIE 3102, Rapid Prototyping and Flexible Manufacturing, (25 September 1997); doi: 10.1117/12.281310
Show Author Affiliations
Marc A. McLean, Univ. of Liverpool (United Kingdom)
G. J. Shannon, Univ. of Liverpool (United Kingdom)
William M. Steen, Univ. of Liverpool (United Kingdom)

Published in SPIE Proceedings Vol. 3102:
Rapid Prototyping and Flexible Manufacturing
Rolf-Juergen Ahlers; Gunther Reinhart, Editor(s)

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