tricky casting annealling Q
Posted: Wed Feb 04, 2004 6:58 pm
I'm hoping that someone heard the tidbit that I need.
I'm told that right angles and other sharp angles need extended annealing time to be successful. The trick that I need, is how much longer?
The piece is approx 12" tall, 8in wide max, with a 2" square channel through the middle. The square core IS solid, and too small to be made holllow with what I currently know. I've been running on the 8 inch Libensky sched from Glass notes, and doubling the hold time, taking the ramp to strain at 1.5x.
Could there be a simple starting point (all castings + glass + ovens are different), from which to extend the sched?
Something like, for 2 internal angles, extend the annealing soak by 75%.
Being on the cutting edge is one thing, dancing on a razor blade, quite another.
Thanks
Greg
I'm told that right angles and other sharp angles need extended annealing time to be successful. The trick that I need, is how much longer?
The piece is approx 12" tall, 8in wide max, with a 2" square channel through the middle. The square core IS solid, and too small to be made holllow with what I currently know. I've been running on the 8 inch Libensky sched from Glass notes, and doubling the hold time, taking the ramp to strain at 1.5x.
Could there be a simple starting point (all castings + glass + ovens are different), from which to extend the sched?
Something like, for 2 internal angles, extend the annealing soak by 75%.
Being on the cutting edge is one thing, dancing on a razor blade, quite another.
Thanks
Greg