Metallurgical Aspects of Production of Solder Powders for Vacuum Diffusion Brazing

Grain size composition, particle surface structure, and gas content in solder powders of the VPr series, prepared by gas jet spraying, grinding of amorphous tape, and melt atomization, are studied. The effect of processing parameters for melting solder billets on gas content in the powder obtained i...

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Bibliographic Details
Published in:Metallurgist (New York) 2014-03, Vol.57 (11-12), p.1120-1125
Main Authors: Evgenov, A. G., Afanas’ev-Khodykin, A. N., Nerush, S. V., Rogalev, A. M.
Format: Article
Language:English
Subjects:
Atomizing
Billets
Characterization and Evaluation of Materials
Charge
Chemistry and Materials Science
Materials Science
Melting
Melts
Metallic Materials
Metallurgy
Oxygen content
Powders
Solders
Sulfur compounds
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Summary:Grain size composition, particle surface structure, and gas content in solder powders of the VPr series, prepared by gas jet spraying, grinding of amorphous tape, and melt atomization, are studied. The effect of processing parameters for melting solder billets on gas content in the powder obtained is studied. It is shown that melt atomizing provides preparation of the highest quality powder with a low oxygen content, even for particles with a size of 10–40 μm. It is established that the double vacuum remelting technology developed for an initial solder charge billet makes it possible to reduce oxygen content in the powder obtained by a factor of 2–2.5. It is shown that hot gas atomizing does not lead to a marked increase in oxygen content of the powder obtained, and the nitrogen and sulfur content does not depend on atomizing parameters and is determined by purity of the initial charge billet.
ISSN:0026-0894
1573-8892
DOI:10.1007/s11015-014-9855-9