Material sorting
Material sorting
(OP)
Several fastener specifications require 100 per cent metal identification on finished parts. This is to prevent material mixups during manufacturing, and is not a chemical composition check but simply a check for the right grade of material.
To my knowledge, the only possible method is by eddy current comparison with a known sample(X-ray fluorescence is out since the check has to be done on finished parts and a lot of finished parts are plated) Does anyone have any experience with such a beast ? Who makes the equipment ? It seems to me, a long time ago, that the precision casting business used 'magnatest' equipment.
To my knowledge, the only possible method is by eddy current comparison with a known sample(X-ray fluorescence is out since the check has to be done on finished parts and a lot of finished parts are plated) Does anyone have any experience with such a beast ? Who makes the equipment ? It seems to me, a long time ago, that the precision casting business used 'magnatest' equipment.





RE: Material sorting
XRF and hardness testing can be peformed on 100% of parts just before plating. If already plated, with adequate energy XRF will reveal the material under the plating.
Also Eddy Currents instruments will be influenced by plating.
http://www.welding-advisers.com/
RE: Material sorting
RE: Material sorting
If you were going to use this method I would think htat you would need to strip the plating from some (after calibration) to verify chemistry (XRF) and hardness.
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Corrosion never sleeps, but it can be managed.
http://www.trenttube.com/Trent/tech_form.htm
RE: Material sorting
The machine was called a "DR FOERSTER" and their web site is:
www.foerstergroup.de
I would suggest that a NON DESTRUCTIVE TESTING equipment supplier could help.