- Joined
- Dec 7, 2000
- Messages
- 5,179
You'd think after doing this so long I wouldn't make so many dumb mistakes - but there you have it. Sometimes I think it's a wonder I've even survived to this ripe age given some of the stupid antics I've pulled.
Anyway, I quenched a long O1 blade, 12" of blade plus 6" of hidden tang, and apparently didn't check it's straightness right then. To top it off, I don't believe I tempered after the quench. But being me I went ahead and finish ground the blade. Then, sitting around admiring one night I noticed quite a curve! Dang! This is pretty pronounced warp, probably 1/8" over the overall length.
So I tempered the blade, finally, and while it was still hot put it in the vise with my three-point bending setup and tried to get it back to true. I've bent this thing probably 1/4" out of straight over a 5" span, and it will not reset.
Because I have so much time in this thing I'm paranoid about breaking it (unlikely, I think, given the high 450 degree temper) if I give it too much bend, but truly it's worthless as it is.
Does anyone have any ideas about a) how far I should be willing to bend it or b) what I might do besides re-HT to get it more amenable to reshaping?
Re-heat treating is mostly out of the question due to the surface of the blade - no way I could match it again to grind out the scale. I thought about using PBC (?) to prevent scale during a second HT, because then I should only have a bit of discoloration to sand blast off. Does that sound likely?
Any ideas are welcome at this point. If I can't find a way to get it straight I think this project will just die as I don't think I'd ever try it again...
Anyway, I quenched a long O1 blade, 12" of blade plus 6" of hidden tang, and apparently didn't check it's straightness right then. To top it off, I don't believe I tempered after the quench. But being me I went ahead and finish ground the blade. Then, sitting around admiring one night I noticed quite a curve! Dang! This is pretty pronounced warp, probably 1/8" over the overall length.
So I tempered the blade, finally, and while it was still hot put it in the vise with my three-point bending setup and tried to get it back to true. I've bent this thing probably 1/4" out of straight over a 5" span, and it will not reset.
Because I have so much time in this thing I'm paranoid about breaking it (unlikely, I think, given the high 450 degree temper) if I give it too much bend, but truly it's worthless as it is.
Does anyone have any ideas about a) how far I should be willing to bend it or b) what I might do besides re-HT to get it more amenable to reshaping?
Re-heat treating is mostly out of the question due to the surface of the blade - no way I could match it again to grind out the scale. I thought about using PBC (?) to prevent scale during a second HT, because then I should only have a bit of discoloration to sand blast off. Does that sound likely?
Any ideas are welcome at this point. If I can't find a way to get it straight I think this project will just die as I don't think I'd ever try it again...