Jump to content
I Forge Iron

Softening 80crv2 Nakago

Recommended Posts

I've been working on a tanto made from 80crv2 (I plan to use 1080/1095 in the future) and have gotten already carved the tsuka and made the habaki and fuchi, so I did the final polish on the blade. Earlier, when I tried to sign the tang with a chisel, it would barely make a mark and dulled the chisel. I had a little more luck with a center punch, but it had to be resharpened along the way. At the time I thought it was just the difference between a high carbon steel and the mid steel I had practiced signing on, but when I went to drill the nakago ana, the cut about 1/16 of an inch in then wouldn't go any further (even with the drill press on the slowest speed, using a slow feed and with a cutting lubricant). Now my thought is that some of the clay covering the nakago chipped off enough for it to at least partially harden, and now I plan to do something to soften it. My idea is to submerge the blade in a bottle of baking soda solution and heat the nakago with a torch. I have a few questions though: has anyone done something similar and found that it doesn't hurt the finish/heat treat of the submerged blade? Will tempering it to a high temperature get rid of any work hardening from the drilling? Can steels like 80crv2 air harden with thin cross sections like this? Thank you for your time.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...