friction folder fail!!! grrrrrrrrrrr
- Thread starter kristophish
- Start date
Yup, hardened and temprered but not for long enough!!
Oh well, u live and learn. Feel like crying!! Boo hoo
Oh well, u live and learn. Feel like crying!! Boo hoo
It was an hour. It slightly warped in the quench and I genty tried to straighten it, then boom, gone!!
On second thoughts, maybe I should have normalised it first? Any hints and tips would be much appreciated. Thanks
Yeah if they warp, reheat them to non magnetic and let cool naturally. Then straighten and re-heat treat it.
What temperature did you temper it at? An hour is normally fine time-wise for carbon steels.
What temperature did you temper it at? An hour is normally fine time-wise for carbon steels.
I temprered at around 200 in the oven. Twas only slightly warped.
The crystal structure seemed quite course inside which is what made me think about the normalization.
And it was a file, w1 or 1095 steel I think from what I can gather. Don't know if it makes much difference?
The crystal structure seemed quite course inside which is what made me think about the normalization.
And it was a file, w1 or 1095 steel I think from what I can gather. Don't know if it makes much difference?
Your tempering temp was too low by a fair bit, that wouldn't have hardly drawn the temper back at all. Aim for 250 next time 
. The blade will have warped because you either heated it too much in a localised area, or moved the blade sideways on quenching.
Never used either of those steels so i cant be more specific i'm afraid.
. The blade will have warped because you either heated it too much in a localised area, or moved the blade sideways on quenching. Never used either of those steels so i cant be more specific i'm afraid.
time isn't nearly as important as temperature Standard industrial HT is 1 hour per INCH of thickness, so an hour ona blade is more than sufficient. The problem is that a file at 200c will likely still be in the region of 62-64RC
How did you try to straighten it? I do a lot of straightening post heat treat, you just have to warm it to a tempering temperature (ie less than you temper at, but still too hot to touch) and then hold in position until it cools. A three point rig in a vice is good for that
Standard industrial HT is 1 hour per INCH of thickness, so an hour ona blade is more than sufficient. The problem is that a file at 200c will likely still be in the region of 62-64RC How did you try to straighten it? I do a lot of straightening post heat treat, you just have to warm it to a tempering temperature (ie less than you temper at, but still too hot to touch) and then hold in position until it cools. A three point rig in a vice is good for that
Right okay then chaps, thank u very much.
I can't tell u how I tried to straighten it cause u might tell me off. Coughhammercough
I can't tell u how I tried to straighten it cause u might tell me off. Coughhammercough
Oh I've already tempered another blade (same steel) at 200 for an hour and a half, is it worth anealing;re hardening and temper at a higher temp?
You don't need to anneal it as you haven't over tempered it. Just put it back in the oven at 250 for an hour and it'll bring the temper down. I can't tell you exactly what it will temper it to, but at a guess i would say around 58Rc If you had gone too hot then you would need to reharden it.
Hammer?... serves you right
Hammer?... serves you right
just temper at a higher temperature. I normally temper twice, the first time at a lower temperature (that way I can check the hardness and decide how much hotter to go on the second run). The only reason to reharden is if you have serious warpage or you over cooked it on the temper (or hardening and its gone crunchy)
I know thats why I didnt want to tell u. Ha. Oh well,I won't be doing that again.
Thanks for the help chaps I really appreciate it. Kris
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