How to Individually Identify Ferrous Metals Covered in Scale?
Scale formed on ferrous metal when heated at high temperature during hot stamping, hot rolling or during casting is hard, thick and dark to the point that it cannot be reasonably laser marked. But a coat of heat-resistant paint applied during the cool down can easily be removed, revealing the code that will follow the product until its next transformation. This is an interesting strategy to implement Direct Part Marking (DPM) to improve traceability and process control.
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