QUENCHING TOO QUICKLY
Quench cracking may occur if the cast is quenched too quickly.
These cracks will appear clean and jagged and may vary in the amount
of fractures. Proper cooling time is the relationship between melt
temperature, flask temperature and size of flask. We recommend a 20
minute wait before quenching. In vacuum casting with large 81/2"
flasks, the button should solidify between 30 seconds and I minute.
If the metal takes longer to solidify a longer hold time on
quenching would be necessary.
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