Balls'd up temper...bad

[Technohedge]

So I hear treated a few knives, two 1085 small ones and a nakiri made from nitro v. The nitro went in the freezer for an hr after.

Chucked them all in the oven after it had cool d then accidentally set the temp to 820c and walked away.

Came to check on them an HR later to find everything glowing and the bar of aluminium I had clamped the nakiri to for straightening purposes was a pool of liquid.

Have I wrecked all of them? None were going to customers anyway so is there any saving them? None were protected from O2 and I have to presume they all saw 800 ish for 40 mins or more

 

[FredyCro]

How thick were the edges before HT? You will have some decarb, but it might not be as bad as you think. You will need to redo the HT obviously.

 

[Stacy E. Apelt - Bladesmith]

Just redo the HT and do the temper properly. You have nothing to loose by trying.

 

[scott kozub]

I'm assuming the nitro v was a blank without bevels? If so it'll be fine. Even if you did grind bevels you just have to remove some decarb as noted above.