Bevel Angle
The weld flank angle is the angle between the prepared joint face and the perpendicular axis of the part. It affects the accessibility of the arc and the quality of the flank fusion.
Physical-Chemical Mechanism of Action
The groove angle determines how well the arc can access the joint. A too large angle (e.g., over 60°) may cause the arc not to fully reach the flank, leading to incomplete fusion and possible cracks. A too small angle (below 30°) increases the accessibility of the arc but does not improve the quality of the sidewall fusion.
Metallurgical Relevance & Risks in Welding
An inappropriate groove angle can lead to the following problems: incomplete fusion, cracks along the joint, poor mechanical strength, and increased stresses in the weld. This can significantly shorten the component's service life.
Workshop Practice & Action Guidelines
For an optimal weld, a groove angle of 45° to 60° is recommended. For heavy steels or high stress levels, the angle should be slightly smaller (e.g., 40°) to increase arc accessibility. Always use sharp joint preparation and ensure that the flanks are smooth and straight.