1776 Posted February 17, 2017 Share Posted February 17, 2017 Just got a large, tanto, bushcraft knife forged to shape, made out of 5160. And I'm almost done with the rough grinding. So up next is heat treating. I've read The Complete Bladesmith: Forging Your Way To Perfection, and The $50 knife shop. So I've got the general method down for carbon steels I think. I hope. #1: Normalize the blade by bringing it up to non-magnetic, and than letting it air cool in still air. Do this three times to relieve stress. #2: Heat your oil to some where between 90-140 degrees Fahrenheit ( really don't have any idea why, just doing it). Heat your knife blade slowly and evenly to non-magnetic, once there quench the blade in the oil. Let sit until the oil stops agitating. #3: Temper your blade by heating the oven from anywhere from 350-450 degrees Fahrenheit (what temperature depends on what you would rather have more, edge holding or toughness). Place blade in oven, leave it there for an hour. Pull out and let cool to room temperature. Do this three times. So... Do I have it right? I just want to make sure, because I've spent a lot of time on this knife, and don't want it to go wrong. The only other thing I've heat treated before was a rail road spike tomahawk. It was kinda "eh". Now I have some steel that I know what it is, and have forged it out. Just want to make sure I'm going to do the heat treatment right. Please help. Thanks! P.S. Why am I supposed to heat the oil? Quote Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.