Abstract No.:
5971

 Scheduled at:
Wednesday, May 22, 2019, Saal Brüssel 11:20 AM
Properties of brazed joints 2


 Title:
Investigation of residual stresses in high-temperature-brazed hybrid Cr-CrNi-steel joints

 Authors:
Wolfgang Zinn / Universität Kassel Institut für Werkstofftechnik Fachgebiet Kunststofftechnik Metallische Werkstoffe, Germany
Wolfgang Zinn* / Universität Kassel, Germany
Hans Jürgen Maier/ Leibniz Universität Hannover / Institut für Werkstoffkunde, Deutschland
Simon Kresnik/ Leibniz Universität Hannover / Institut für Werkstoffkunde, Deutschland
Kai Möhwald/ Leibniz Universität Hannover / Institut für Werkstoffkunde, Deutschland
Arnaud Magnier/ Universität Kassel, Germany
Berthold Scholtes/ Universität Kassel / Institut für Werkstofftechnik, Deutschland
Thomas Niendorf/ Universität Kassel, Germany

 Abstract:
In many cases, e. g. in vehicle construction, heating or energy technology, manufacturing processes based on brazing technology are applied. In this context many components made of high alloy steels are produced, which are brazed in vacuum or protective gas furnaces at temperatures above 900°C. Often joining of ferritic and austenitic steels is desirable or even necessary. Due to different thermo-mechanical properties of the materials and the braze metal used, high residual stresses can occur, which considerably reduce strength in comparison with joints made of similar steel types. In this project residual stress states are analysed and assessed in detail depending on material combinations, geometries of the joints and the process parameters applied in furnace brazing operations. From that, strategies are derived and evaluated to reduce residual stress in brazed dissimilar joints. As a result, manufacturers should be enabled to produce reliable high-strength hybrid components made of different stainless steel types.

<= go back