Non-destructive evaluation of layers after thermo-chemical treatment

Tesárková Klára - Bodycote HT s.r.o. (Czech Republic)

Evaluation of layers after thermochemical treatment is typically associated with the preparation of metallographic cross-sections and destructive testing. In cases where nitrocarburizing or carburizing processes are carried out in batches of hundreds to thousands of parts, destructive testing is challenging and requires a large number of samples. Moreover, if a process failure occurs and there is suspicion that some parts do not meet specifications, the costs of scrapping can be significant.

This contribution focuses on a non-destructive testing and batch sorting method using the Magnatest device, which can significantly facilitate handling of suspect batches and minimize costs related to non-conforming parts. Additionally, this methodology can serve as a valuable complement for verifying test batches during production ramp-up.