Joint Preparation Geometry
Joint preparation geometry is the formal shaping of the groove faces to ensure complete root fusion and avoid lack of fusion defects.
Physicochemical mechanism of action
The joint preparation geometry affects the surface of the steels to be welded. Correct design ensures that all groove loads and stresses are evenly distributed. This prevents local overheating or cooling that could lead to cracks or irregularities.
Metallurgical relevance & risks during welding
Incorrect joint preparation geometry can lead to lack of fusion and uneven cooling. This increases the likelihood of cracks, hot cracks, or uneven hardness distribution in the weld.
Workshop practice & action instructions
Ensure the groove faces are straight and flat. For steel grades with high carbon content, use additional root treatment (e.g., grinding or polishing) to create a homogeneous surface. For heavy stresses or when welding thin sheets, increase preparation time and ensure even heat distribution.