Backstep welding technique
Backstep welding technique: sections are welded opposite to the overall welding direction to reduce distortion. This distributes stress in the workpiece more evenly and minimizes the risk of cracking.
Physicochemical Mechanism of Action
In the backstep technique, short sections are welded in the opposite direction to the main welding direction. This distributes the stresses in the workpiece more evenly during welding and reduces the risk of local stress concentrations.
Metallurgical Relevance & Welding Risks
The backstep technique minimizes cracking and distortion, since the stresses are distributed more evenly. Wrong application, however, can lead to uneven cooling and local stress concentrations, which in turn can cause cracks or damage.
Workshop Practice & Instructions
To apply the backstep technique successfully, the welder must keep the right sequence and speed. The temperatures should be set so even cooling is ensured. Uneven cooling can cause stress concentrations and raise the crack risk.