Electron beam freeforming on type 321 stainless steel using BNi-2 brazing paste

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DOIResolve DOI: http://doi.org/10.1179/174328405X39671
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TypeArticle
Journal titleMaterials Science and Technology
ISSN1743-2847
Volume21
Issue5
Pages613618; # of pages: 6
Subjectelectron beam; freeforming; brazing paste; buildup; stainless steel
AbstractThe use of electron beam technology for freeforming nickel based buildups on type 321 stainless steel substrates was investigated in the present work by using BNi-2 brazing paste as a filler metal. The electron beam freeforming studies involved variation of processing parameters, namely welding speed and number of successive melting passes, to examine the effect of these on the characteristics of the line buildups. It was determined that the amount of porosity in the deposited layers could be reduced to less than 0.6% by applying consecutive remelting passes and/or reducing the welding speed from 20 to 15 cm min−1 without thermal softening of the buildups, as indicated by the high hardness of the rebuild. Nonetheless, since the dimensional features (height/width ratio) of the buildups were found to be dependent on both the number of remelting passes and the welding speed, tailoring of deposit quality in relation to geometrical requirements is necessary.
Publication date
LanguageEnglish
AffiliationNRC Institute for Aerospace Research; National Research Council Canada
Peer reviewedYes
NPARC number21276088
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Record identifierc929a4c5-442d-4b8d-b885-99c72eabc53b
Record created2015-09-23
Record modified2016-05-09
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