NADCA Video News Update: T6 Heat Treating of Strontium Modified, Low-Iron Conventional Die Castings
The material presented in this video are some highlights from NADCA’s online webinar - T6 Heat Treating of Strontium Modified, Low-Iron Conventional Die Castings. This series explains chemical composition and physical properties of common alloys used in die casting. The course walks through the die casting process and explains the need for proper die cooling and die lubricants.
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For information on purchasing a downloadable copy of this webinar in its entirety, please visit: www.diecasting.org/store/detail.aspx?id=WEB250
"And so the quality index, what it does, it allows us to compare the mechanical property data we get for different compositions, for different die casting alloys, for different heat treatments. And so it gives us a number to say, ah, this one is actually better than this one.
How do we calculate it? There's various ways in the technical literature that people have come up with defining quality indices, but the one I like is the one that's shown here. So what we're showing is that quality index is equal to the yield strength and the yield strength is in MPa not in KSI and then we add to that 210 times the log of the elongation and then we add 13 to that.
I like it for two reasons, because it includes yield strength and yield strength, if I get metallurgical a little bit, yield strength is basically material property, but it's not very dependent upon defects in the casting. Elongation is based on fracture and therefore it is very dependent upon defects in the casting. And so by adding these together, we have material property from the yield strength, we have fracture properties from elongation, it kind of gives us a good combination and that's why I like to use this as a quality index.
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."
About the North American Die Casting Association
Headquartered in Arlington Heights, IL, the North American Die Casting Association (NADCA) represents the voice of the die casting industry, representing more than 3,100 individual and some 300 corporate members in the United States, Canada and Mexico. NADCA is committed to promoting industry awareness, domestic growth in the global marketplace and member exposure.
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