Technique in which a brazing filler, typically a fluxed bronze rod, is deposited into a groove, fillet or buildup with an oxyfuel torch, the way a weld bead is laid. The base metal is heated to a dull red but not melted, and the joint gets its strength from wetting and bead size rather than capillary flow. It repairs cast iron and joins galvanized or dissimilar parts with less heat and cracking risk than fusion welding.
Cracked cast iron housing, don't stick weld it, V it out and braze weld it with bronze.
Also heard as
- bronze welding
- braze weld
Do not mix it up with
- Brazing: Brazing pulls filler into a tight gap by capillary action, while braze welding builds a bead in an open groove or fillet like a weld.
Related terms
Brazing
Joining metals with a filler melting above 450 °C but below the base metals, drawn in by capillary action.
Wetting
Molten filler spreading across a clean surface and bonding to it, needed for a sound braze or solder.
Flux
Material that shields molten metal from air and cleans oxides, as rod coating, wire core, granules or paste.
Rosebud
Shop name for a multi-flame oxyfuel heating tip used to preheat, bend and loosen parts.