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D. Burzic, J. Zamberger, E. Kozeschnik:
"Nondestructive Evaluation of the Decarburization Depth of Spring Steel with Electromagnetic Measurement Methods";
Talk: Materials Science & Technology 2009, Pittsburgh (USA); 2009-10-25 - 2009-10-29.

Surface decarburization in the process of spring steel making often leads to deteriorated mechanical behavior of the finished components in service. Steel industry has a strong interest to replace time consuming and expensive destructive mechanical tests by non-destructive methods, which can be even integrated within the production process. In the present work, the decarburization depth, as well as hardness depth have been investigated using the QUALIMAX device. It is operating according to the KEMAG method, which is based on the evaluation of a combination of various electromagnetic measurement methods. Investigations of the decarburization and hardness depth are performed for 51CrV4 spring steel. Good agreement between experimental results and classic destructive methods has been achieved.

decarburization, hardness, non-destructive testing, spring steel