Thickness-Related Welding Parameter
The thickness-related welding parameter is a characteristic value matched to the component thickness, ensuring that heat input and interpass temperature are optimal. It prevents unacceptable microstructural changes in thick sections.
Physical-Chemical Mechanism of Action
The thickness-related welding parameter refers to the energy transferred to the workpiece during welding. This energy affects the temperature and structure of the weld. For thick components, it's especially important to control this energy so that the structure remains stable and no unacceptable changes like melting or overhardening occur.
Metallurgical Relevance & Risks in Welding
If the thickness-related welding parameter is not set correctly, dangerous structural changes can occur. For example, heat input can be too high and overharden the workpiece, leading to crack-sensitive martensite. Alternatively, it can be too low and cause the workpiece to fuse, causing porosity and loss of strength.
Workshop Practice & Instructions
To set the thickness-related welding parameter correctly, heat input and interpass temperature must be precisely matched to the part thickness. This can be achieved by using specialized welding parameters and controlling travel speed. For thick sections, it's important to choose a slow travel speed and regulate heat input so that the temperature stays in the critical window. This can be done by using specialized welding parameters and controlling travel speed.