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MODERN CASTING .COM


MCTV VIDEO Engaging Your Workforce


Dotson Iron Castings Chairman Dennis Dotson discusses how the company works to continuously involve and engage its workers in the MCTV video “Engaging Your Workforce.”


MCTV, a new Ameri- can Foundry Society and MODERN CAST- ING video portal, launched this month. MCTV intends to bring a new medium to the industry to continue educating and advancing the industry.


Visit www.afsinc.org/MCTV to learn more.


LINKEDIN DISCUSSION Lowering Iron Content


On the Foundry and Diecaster Network on LinkedIn, a member asked, “How does low- ering Fe [iron]content from over 0.5% to 0.2% affect the solidifi cation character- istics of pressure diecast Al - 9Si alloys?” Below are excerpts of some of the discussion points:


“Fe content doesn’t affect


solidifi cation characteristics. And in pressure die cast, Fe content must be between 05.% to 1.0%. Lower Fe content rises problem of stacking.” —Pravin K.


POLL QUESTION


The March website question asked: How long is your new employee training program?


This month’s question is available at www.moderncasting.com.


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“Fe level in Aluminum alloy should be well within 0.5% to 1% for PDC as Pravin mentioned. Lower than this will adhere on the die steel during the production. Motor rotors are generally cast with Pure aluminum only. Gating should be better/larger to reduce the gate velocity, thereby soldering is mini- mized.” —Surianarayanan C.


Join the discussion. Visit


moderncasting.com for a link to the Foundry and Diecaster Network.


Editor’s Note: MODERN CASTING does not necessarily endorse the views expressed in the discussion.


April 2013 MODERN CASTING | 5


“Lowering the iron content will allow you to obtain better mechani- cal properties (especially elonga- tion), but you will get problems with die sticking. You can avoid them by increasing the Mn content (like in the 365 or A365 alloys) and add higher Sr like in the Mercalloy 367 and 368. “ —Martin H.


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