D
Dougie
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I have been casting for a large lab for over 20 years on an ECM4 Austenal casting machine. We have been using Argedent 62 for longer than that. Around 5 years ago, we started noticing foreign objects in our buttons and sprues after casting. These objects are not investment. They are hard and grey. I have to dig most out with a carbide burr. They are so hard that they can dull a new burr. Sometimes they travel into the casting themselves. We cast seven other precious alloys and 4 non prec., and we do not have this problem with any other alloy. The alloy manufacturer told us that it was from using an induction casting machine. Others told us that it was from using a carbon insert. So my boss had me stop using the ECM. I started with new metal and have been torch casting for the last week, and guess what, the stuff is back. Anyone have any ideas.
Thanks,
Dougie
Thanks,
Dougie