1. Physical principles
Brazing is governed by three fundamental physical principles, which are entirely interrelated. Only the combination of these three principles can result in a quality brazed joint that meets all industrial specifications (mechanical strength, corrosion resistance, appearance, cost...).
1.1 Mooring
Wetting, in the context of brazing, corresponds to the spreading of the filler metal alloy on a metal and/or ceramic surface, when brought to a liquid state and under satisfactory operating conditions (surface preparation, atmosphere, temperature, etc.). Wetting is characterized by the angle formed by the filler alloy and the substrate on which it is applied. In all cases, we aim for the smallest possible wetting angle (figure...
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Physical principles
Filler alloy
Bibliography
Standards and norms
- Welding, soldering, braze welding – Soldering, brazing and brazing filler metals – Classification, coding, reception. - NF A 81-362 - décembre 2013
- Welding and related techniques – Brazing ability – Definition and use of a variable clearance specimen. - NF A 89-410 - janvier 2017
- Essais destructifs des assemblages réalisés par brasage fort. - NF EN 12797 - septembre 2000
- Brazing – Filler metals....
Directory
Welding Institute
ZI Paris Nord 2 – 90, rue des Vanesses
BP 51362 – 95942 Roissy Ch. De Gaulle Cedex, 93420 Villepinte
Brazing laboratory :
ZA Regional Airport
4, Rue Pilâtre de Rozier
...
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