Invalid joint flank angle
The groove flank angle doesn't match the specified tolerances, which affects arc control and penetration.
Physical-Chemical Mechanism of Action
The arc conduction depends heavily on the exact flank angle of the groove. An invalid flank angle can prevent or disturb the arc guidance, leading to uneven penetration and defective welds.
Metallurgical Relevance & Risks During Welding
An invalid flank angle can lead to the following problems: irregular arc formation, uneven melting of the groove faces, lack of weld density, and increased susceptibility to cracks. This compromises the strength and mechanical behavior of the weld.
Workshop Practice & Actions
Make sure the flank angle of the groove exactly meets the specified tolerances. Use a precision tool for precision grinding or sharpening of the groove flank. Check the quality of groove preparation regularly and correct if necessary.