Highlights from NADCA’s online webinar
High Integrity Die Casting Melting, Melt Treatment, and Transfer
The material presented in this video are some highlights from NADCA’s online webinar - High Integrity Die Casting: Melting, Melt Treatment, and Transfer for High Integrity Die Casting. In this webinar best practices of melting, melt treatment and transfer for aluminum high integrity die casting of structural components will be presented and discussed. Many oxide and other inclusions originate from inappropriate practices with the liquid aluminum before it is cast. They cause quality issues / high scrap rates and reduced properties. This webinar explains how to avoid them by using best practices like filtering, degassing, fluxing, skimming, settling, quiescent transfer, etc.
Transcription from the video highlight,
"So, all these inclusions are causing us a lot of problems. What are the detrimental effects of them? Well, first of all, they reduce machinability. They cause pretty high tool wear. They cause increased porosity because their nucleation points. They also cause reduced foundry fluidity, and that's really bad if we want to cast a large dangly casting with a two millimeter wall thickness. It can be even a possible blockage, so we can't feed anymore, and then behind that blockage, we will just create a void.
So therefore, we need filtering. We need degassing/fluxing, and skimming. Don't forget that. You want to take it out. And then, settling, some people might work with troughs to transfer the metal from melting to dosing, and that's not a bad thing. That's a good thing if you use it properly, because heavier particles will just settle down because of the difference in density.
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 test, when applicable."
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