The material presented in this video are some highlights from the North American Die Casting Association’s online webinar - Die Casting Defects - Inclusions, Leakers and Cracks.
This course discusses various types of inclusions and corrective measures to minimize inclusions. In addition, causes of leakers and corrective measures are presented. Lastly, the various causes of cracks in die castings are discussed.
For information on purchasing a downloadable copy of this webinar in its entirety, please visit: http://www.diecasting.org/store/detail.aspx?id=WEB297
From the translation,
"Inclusions are mainly a problem in aluminum, but they also occur in zinc and magnesium. In magnesium, you're going to be worried about magnesium oxide. You're going to be worried about the foreign materials also because you're dealing with high temperature. In any one of these if you're not using iron pots for zinc, if you're using refractory pots, and you're using refractory for magnesium, potentially any refractory material can get in there.
So these inclusions can cause problems with strength. They become extremely hard spots in the casting matrix in any one of the alloys, and they are potentially going to upset your flow. So if you get large inclusions, large pieces of material, it can actually come through the gate or combine in the casting and then obstruct the flow, and also you now have concerns or other flow issues due to inclusions in the metal. Now the most prevalent inclusion that is out there is going to be the oxide in the metal.
To purchase access to this course, visit the NADCA marketplace at www.diecasting.org/store. Purchasing a course through the online education system grants you one year of access to the recording, presentation, support material, and tests when applicable."
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