Non-destructive hardness testing of heat-treated mass parts with multiple frequency magnetic test method

Non-destructive test of automotive massparts

The non destructive 100% inspection of parts by mass production gaining more and more importance. Especially under the requirement of zero error tolerance, it is necessary for the manufacturer of parts by mass / safety parts carry a 100% hardness / microstructure test on the heat treatment results. The test with inductive-magnetic test methods here is the procedure of choice. The current methods of magnetic inductive testing are presented. The advantages of the multi-frequency testing presented and illustrated by practical examples.

• history of the magnetic inductive testing
• existing methods
• how does the multiple frequency magnetic-structure test works
• what kind of heat treat errors can be found
• how exactly can parts be separated
• practical applications
• max. test speed