Abstract No.:
7147

 Scheduled at:
Tuesday, June 21, 2022, Saal Brüssel 12:20 PM
Furnace brazing


 Title:
Nickel-braze coated stainless steel sheets for the production of complex brazed assemblies

 Authors:
Ulrich Holländer* / Leibniz University Hannover, Germany
Chris Pfeffer / Leibniz Universität Hannover / Institut für Umformtechnik und Umformmaschinen, Germany
Sven Hübner/ Leibniz Universität Hannover / Institut für Umformtechnik und Umformmaschinen, Germany
Kai Möhwald/ Leibniz Universität Hannover / Institut für Werkstoffkunde, Germany
Bernd-Arno Behrens/ Leibniz Universität Hannover / Institut für Umformtechnik und Umformmaschinen, Germany
Hans Jürgen Maier/ Leibniz Universität Hannover / Institut für Werkstoffkunde, Germany

 Abstract:
Nickel brazing alloys are the preferred filler metals for brazing corrosion-resistant sheet metal components made of stainless steels. These braze metals are brittle alloys which are usually supplied as brazing powders and therefore have to be applied to the component surfaces to be brazed by means of organic binders. In terms of economical production, however, a binder-free, two-dimensional deposition of braze metal on the sheet, which is already present on the semi-finished products and permits subsequent mechanical forming and processing steps, is of great advantage for many applications.
Within the scope of the project, a process is being developed with which stainless steel sheet are layered via braze-coating. Investigations are being carried out on the braze-coated sheets to determine the formability of the material as a function of braze layer thickness and morphology, with the aim of finding suitable process conditions under which the braze-coated sheets can be deep-drawn, for example, while retaining the braze coat. This contribution presents actual results referring on the production of with powdered braze coated sheets, their formability and the brazing-processability of formed sheet components.


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