Comparative Evaluation of Marking Methods on Cast Parts of Al–Si Alloy with Image Processing

Abstract Quality issues caused by casting defects are commonly complicated to solve, because the part-specific process parameters not traced individual cast part. This problem can be mitigated traceability of each part with an identifier code. Therefore, a study influence marked surface topography and post-treatments on code symbol quality is desirable for well-designed system. In this work, laser, dot peen, electrolytic marking methods three as-cast surfaces Al–Si alloy, after sandblasting heat treatment, evaluated comparatively customized image processing software. The result shows that laser method produces highest performance different surfaces; provides acceptable results only smooth high-pressure die casting; peen codes high contrasts, which similar those marking, especially rough sand casting. However, all methods, qualities topographies decrease substantially post-treatments. Considering has satisfying performances as well low equipment maintenance costs, more suitable small- medium-size foundries start trace in economical manner.