Brazing is a versatile process used in many industries to join materials permanently. Repair brazing is an essential part of the industry and usually is done for one of two reasons – to braze repair parts in-house before they are released to customers and to perform repairs on brazed components that have worn out in service.
The former involves in-house quality assurance programs designed to detect braze defects before they get out the door. The latter involves brazed components worn out from corrosion, erosion, or fatigue (thermal and/or mechanical) in cyclic service, resulting in surfaces that are cracked, pitted, or eroded.
Next Month: In my next article we will be discussing that when a brazing filler metal (BFM) is melted during a brazing process, it is not uncommon for “liquation” to occur.