Thanks John.
The thought has been rattling around in my head -- how could you have
"spots" , in a homogeneous alloy??? If it was completely homogeneous,
wouldn't one area behave just like any other area??
Note: I know nothing about foundry processes.
I wish I had more answers than questions,
Bryan
John Burk wrote:
>Like exhaust manifolds and flywheels , brake rotors are ductile iron castings
>- Ductile iron is regular iron with sulpher added to change the grain
>structure - Hard spots sound like foundry errors .
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