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Dr. Johannes Diller

damage to weld seams

Causes of faulty welds: Inadequate weld seam preparation, incorrect filler materials, unsuitable material combinations and non-compliance with heat treatments are common. Typical welding defects such as cardboard joints, solidification cracks, shrinkage cavities, hardening and undesirable microstructure formation often lead to fractures or corrosion damage during operation. Our experts analyze welding defects using metallography and hardness testing and offer targeted advice on how to avoid defects.

Typical damage and causes of welded joints

Schaden Cause Episode
cardboard connections Inadequate weld preparation, incorrect welding parameters, incorrect filler materials Weak connection, insufficient strength
solidification cracks Cooling too quickly, insufficient heat treatment, wrong choice of material cracking in the weld
void formation Trapped gases during the welding process, inadequate welding technique porosity and weakening of the weld
hardening Too high welding speed, incorrect heat treatment, wrong choice of material brittleness and lower toughness of the weld
Undesirable microstructure formation Insufficient control of welding parameters, unsuitable materials or faulty heat treatment Negative effects on material properties
stress cracks Insufficient relaxation of the welded joint, high internal stresses due to incorrect welding technique cracking due to stress
Corrosion damage Incorrect material combinations, lack of heat treatment, inadequate protective measures against environmental influences material degradation due to corrosion
Weld defects Incorrect welding technique, inadequate weld preparation, incorrect filler materials Reduced strength and structural integrity

Image gallery Damage to welded joints