In
Feature A, the main bosses hold the bearings which support the locking rod.
This is a section that has a high strength
requirement -- 50 ksi ultimate tensile stress and 40 ksi yield stress.
It is important to produce rapid solidification in
the boss sections, which are 1.3” inches thick.
Chill blocks are placed in the cores to line up
with the main bosses. The chill blocks produce the required rapid heat transfer and
controlled solidification and microstructure.
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