18 years ago
I am having to bend some 5/8" AR 360 Plate, approximately 1 1/4" wide. I
am using a 200 ton Haco-Atlantic press brake, but we are still having to
heat the parts to get them to bend without breaking. Let me tell you, THAT
was not fun.
The first piece I broke had already bent my bottom die and after fixing it
I needed to get a few more degrees of break into it. I was just at the
bottom of the stroke when it BANGS! I immediately let off and start looking
at my dies to see what broke this time. To my surprise it was the part that
had cracked, 3/4 of the way threw from the bottom/outside of the break and
very jaggedly. I have been sure to be standing at an angle to the part,
neither directly in front or to the side in case something decides to make a
quick exit. :)
Anywho, here's my question. I am heating this AR plate (with an O/A
rosebud torch) to a dull red, about 1" to each side of the break point,
mostly on the bottom/outside of the break where it cracked before. My
concern is am I going to hurt its abrasion resistance doing this? Could I
be taking out some of its temper in the area that I am heating? Is the
resistance due to the alloying of the metal or a tempering process I could
be screwing up?
I will thank all repliers now for your time and consideration, and I also
hope this makes enough sense to be repliable to.
Jim C Roberts