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| Abstract No.: |
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Scheduled at:
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Thursday, June 23, 2022, Saal Brüssel 10:00 AM
Quality assurance, process and product quality
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| Title: |
Influence of the shielding gas quality on microstructure and mechanical properties of induction brazed joints using Ni60CrPSi
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| Authors: |
Thomas Uhlig* / Chemnitz University of Technology, Germany
Guntram Wagner / Chemnitz University, Germany
Vasilii Fedorov/ Institute of Materials Science and Engineering, Chemnitz University of Technology, Germany
Sebastian Weis/ Institut für Produktionstechnik, University of Applied Science Zwickau, Germany
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| Abstract: |
Due to the demand for good mechanical properties and a high corrosion resistance, many parts are brazed in vacuum furnaces or conveyor belt furnaces using Ni-based brazing fillers. The use of furnace processes, however, leads to a limitation of the component size from a technical and economic point of view. In order to be able to realize brazed joints even on larger structures, induction brazing with local gas shielding could be an alternative. In this work, investigations on the influence of the shielding gas quality on the microstructure and the mechanical properties of the brazed joints were done. The gas shielding was carried out in two different ways. On the one hand, specified gas mixtures of argon and air were applied in a glass tube in order to determine the influence of the oxygen content in the process gas on the brazing result. On the other hand, a shielding gas nozzle was built to demonstrate the possibility of a local gas shielding for brazing processes without a process chamber. The quality of the local gas shielding was determined by measuring the oxygen content. The results of the microstructural investigations were correlated with the mechanical properties as well as the shielding gas quality.
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