Weld Joint Face
The weld flank is the prepared surface of the base material that accepts the filler material and determines the groove geometry.
Physicochemical Mechanism of Action
The weld flank is the surface of the material that comes into direct contact with the filler metal. It is prepared by machining or cutting the base metal and must be clean and smooth to allow a homogeneous bond.
Metallurgical Relevance & Welding Risks
A poorly prepared flank can lead to uneven stresses and porosity. This increases the risk of cracking and reduces weld strength. A smooth, clean flank, on the other hand, promotes a homogeneous bond and improves mechanical properties.
Workshop Practice & Instructions
Make sure the weld flank is clean and smooth before welding. For steel materials, use a flat scraper or a cutting machine for preparation. Avoid over-preparation, as this can lead to uneven stresses. The optimal flank width is typically 1-2 mm.