Weld run-off geometry
Weld profile geometry describes the shape and size of the weld, including its depth, width, and length. Optimal geometry improves mechanical strength and prevents cracks.
Physical-Chemical Mechanism of Action
The weld crater geometry affects the stress distribution in the weld. A too thin or too thick weld can cause uneven stresses, which can lead to cracking.
Metallurgical Relevance & Welding Risks
Poor weld crater geometry can lead to underdeveloped or overdeveloped microstructures. Underdeveloped microstructures are softer and lose their toughness, while overdeveloped ones are glass-hard and more crack-prone. This increases the risk of cracking and reduces the service life of the weld.
Workshop Practice & Action Instructions
To ensure optimal weld crater geometry, pay attention to the following parameters:
• Depth of the weld: Should be about 1.5 to 2 times the thickness of the weld metal.
• Width of the weld: Should be about 3 to 4 times the thickness of the weld metal.
• Length of the weld: Should be long enough to cover the entire area to be joined without being excessively long.
Always use a high-quality weld and ensure correct alignment and positioning of the tools. This ensures even stress distribution and minimizes the risk of cracking.