Uneven weld reinforcement
Uneven weld reinforcement is an uncontrolled variation in bead geometry that causes notches and affects welding behavior.
Physical-Chemical Mechanism
An uneven weld reinforcement is caused by irregular bead movement or uneven tension on the workpiece. This leads to different welding conditions at various points along the weld, altering the surface and structure.
Metallurgical Relevance & Welding Risks
Uneven weld reinforcement can cause notches that reduce the mechanical properties of the weld. This increases the risk of cracks and lowers the material's toughness. It can also lead to uneven stress distribution and further issues.
Workshop Practice & Instructions
To avoid uneven weld reinforcement, check and calibrate the beads regularly. Keep the tension on the workpiece constant. When using shielding gas, ensure a steady gas flow. Proper pre-treatment of the material and sticking to the right welding parameters (temperature, time) are key.