Weld Joint / Joint Type
A weld joint is a spatial arrangement where two parts are brought together for welding. Typical joints are butt and lap joints.
Physical-Chemical Mechanism of Action
A weld joint is a specific arrangement where two parts are fitted together in a fixed geometric relationship for welding. This can be a butt joint (flat contact surface) or a lap joint (overlapping surfaces).
Metallurgical Relevance & Risks in Welding
The correct choice and execution of the weld joint affect the strength, ductility, and toughness of the weld. A wrong joint angle or uneven contact surface can lead to stresses that may cause cracking. Furthermore, a faulty joint can cause uneven melting of the metal, leading to porosity and weld defects.
Workshop Practice & Instructions
When making a weld joint, it is important to align the parts accurately and ensure the contact surface is flat and smooth. For butt joints, the joint angle should be between 80° and 90°. For lap joints, the overlap must be precisely maintained to ensure even fusion. Temperatures and times for melting and cooling must be strictly followed to achieve a clean and tough result.