Incompletely filled groove
Incomplete filled groove is a groove along the weld where the weld metal isn't enough to reach the base material level. This causes a local weakening of the part's cross-section.
Physical-Chemical Mechanism of Action
The incompletely filled groove occurs when the weld metal does not flow sufficiently or hardens too quickly during cooling. This can be caused by excessively high carbon content in the steel or too short heat treatment times.
Metallurgical Relevance & Welding Risks
An incompletely filled groove leads to a local weakening of the component cross-section, which impairs the mechanical properties of the weld. This can lead to cracks or fractures in the component, especially under load.
Workshop Practice & Instructions
To avoid incompletely filled grooves, it is important to precisely control welding parameters such as temperature and time as well as the carbon content of the steel. Adequate heat treatment and proper welding technique are crucial. In case of missing or incompletely filled grooves, the weld should be repaired or re-welded.