Thread: Annealing issue
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Old 01-23-2020, 01:06 PM
Pete VanderLaan's Avatar
Pete VanderLaan Pete VanderLaan is offline
The Old Gaffer
Join Date: Apr 2002
Location: Chocorua New Hampshire
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No, Ed would get mad at me for quoting Frank Wooley on annealing.

I tend to think that work can be brought up fairly quickly from Room temp to the upper annealing range. The reason I caution going very slowly is when the issue is of a shutdown in a crucible full of glass. At that point you are dealing with two very different animals.

In the glass, the critical issue is simply heating uniformly- harder to do with weights, particularly if they have other inherent strains built into them, like colorful inclusions. If I was bringing a weight back up that had already been in a crash, I would be inclined to take five hours getting to 700F and then scoot up to the upper annealing range ( remember it's a range) and holding there for two hours before beginning a downward ramp. The easiest way to check whether this is sufficient would be a witness weight, always made in clear. It will tell you the story.

The lower you attempt to anneal in the range, the longer it will take to anneal.
Where are we going and why am I in this basket?
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