Weld metal analysis
Weld metal analysis checks the chemical composition of the melted material to ensure the alloy structure is correct and no unwanted elements have been introduced. This is crucial for weld quality.
Physicochemical mechanism of action
Weld metal analysis involves analyzing the fused material to determine its chemical composition. This is done using methods such as X-ray fluorescence (XRF) or energy-dispersive spectroscopy (EDS). The analysis shows which elements are present in the material and in what amounts.
Metallurgical relevance & risks during welding
The correct alloy structure is crucial for the strength, toughness, and resistance of the weld. If unwanted elements such as oxygen or sulfur are present in excessive amounts, this can lead to a degraded microstructure, which in turn can cause cracking or deformation. An incorrect alloy can also reduce the service life of the weld.
Workshop practice & instructions
Before performing a weld metal analysis, clean the material thoroughly to avoid external interference. Perform the analysis regularly when producing new weld metal types or when unusual problems occur. When interpreting results, consider the specific requirements of the material and the application.