Wetting Contact Angle
The wetting angle indicates how well the solder penetrates into the workpiece lattice. A small angle means good wetting and smooth capillary flow.
Physical-Chemical Mechanism of Action
The wetting angle is the angle between the solder and the workpiece surface. It determines how well the solder penetrates into the workpiece lattice. A smaller angle means better penetration and spreading.
Metallurgical Relevance & Risks in Welding
A large wetting angle can lead to poor wetting. The solder stays on the surface and forms pores or cracks, compromising weld strength. A small angle ensures good wetting and prevents such issues.
Workshop Practice & Action Instructions
To achieve a good wetting angle, pay attention to the correct solder type, flux, and temperature. An angle of about 20-30 degrees is ideal for many steels. For special materials or high strength requirements, a slightly smaller angle may be used.