Journal
MATERIALS & DESIGN
Volume 28, Issue 8, Pages 2278-2286Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2006.08.008
Keywords
stainless steel; electron beam freeforming; wire feed
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The use of electron beam technology for freeforming build-ups on 321 stainless steel substrates was investigated in this work by using 347 stainless steel as a filler metal. The electron beam freeforming studies indicated that line build-ups could be deposited on the substrate material for optimized processing conditions and a slight linear thickening of the re-build occurred as a function of the deposited layer. The evolution in the formation of the Ti (C,N), (Nb,Ti) carbonitrides and Nb (C,N) precipitates was demonstrated to counteract the formation of detrimental Cr-carbides usually observed during welding stainless steels. The mechanical properties of the re-build were similar to the properties of the base metal, showing that homogeneous properties can be expected in the repaired components. Crown Copyright (C) 2006 Published by Elsevier Ltd. All rights reserved.
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