Process Analysis of Laser Beam Cladding

[+] Author and Article Information
A. F. H. Kaplan

ISLT - Department of Non-Conventional Processing, Forming and Laser Technology, Vienna University of Technology, Arsenal, Objekt 207, A-1030 Vienna, Austria

G. Groboth

Group on Materials Technology, Austrian Research Center, Seibersdorf, A-2444 Seibersdorf, Austria

J. Manuf. Sci. Eng 123(4), 609-614 (Apr 01, 2000) (6 pages) doi:10.1115/1.1344899 History: Received April 01, 1998; Revised April 01, 2000
Copyright © 2001 by ASME
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Basic mechanism of single-step laser beam cladding
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Model geometry: (a) side view, (b) cross section
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Heating of a Stellite 6-powder particle as a function of time; (1) heating by the laser beam, (2) heating by the melt pool, (3) equilibrium with the melt pool; the three curves correspond to particles with different pool entrance location xe
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Experimental (Weerasinghe and Steen, 1987) and calculated melt pool and clad layer dimensions in dependence of the processing speed for laser cladding of stainless steel on mild steel
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Clad layer height and bulk melting depth as a function of the powder feeding rate for varying translation speed and beam power; height limited by: (1) mass balance, (2) energy balance
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Substrate dilution, powder catchment and powder heating efficiency as a function of the powder feeding rate, corresponding to Fig. 5
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Cross sections of overlapping clad layer tracks: (a) little overlap (45 percent, Δyb=3 mm), (b) significant overlap (75 percent, Δyb=1.5 mm)




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