Weave welding
Weave welding moves the welding torch across the welding direction to create wide layers. It spreads the heat input over a larger area and fills joints evenly.
Physical-Chemical Mechanism of Action
Weaving the torch across the welding direction spreads the heat input over the surface to be joined. This allows wide gaps to be filled evenly and heats the metal more uniformly across the entire weld zone.
Metallurgical Relevance & Welding Risks
Weaving reduces the likelihood of porosity because the heat input is evenly distributed. It also prevents hot cracking and increases the strength of the weld. However, too fast a weave can cause uneven distortion, leading to stress and possible cracks.
Shop Practice & How-To
Use a torch with a suitable diameter for the gap to be filled. Keep the heat input constant and weave the torch across the welding direction. A speed of about 5-10 cm/s is common. Make sure the heat is spread evenly and no uneven distortion occurs.