heat treating

Joined
Dec 3, 2005
Messages
51
I'm making a knife from 0-1. It is 1/4 in stock. I'm doing it by stock removal. It is a big knife. My question is how close to finished do I need to get the knife before I send it to a heat treater? How far from the edge being sharpened and how close to a mirror finish do I need? Also, can I have the knife selectively hardened and who are some people I can send it to? Thank you for all and any help.
 
Joined
Sep 10, 2004
Messages
362
I grind to about 80/ 100 grit. Alot depends on what end you want to do more of the work, I prefer to do it after HT.
 
Joined
Jul 11, 2003
Messages
3,258
Like Frank, I rough it out to 80x then HT it. I do my finish grinds after HT.
 
Joined
Oct 13, 2005
Messages
1,236
It depends on weather you are finishing bt hand or machine. Alot of new makers do not have a grinder to finish. If you are doing it by hand you will have a shit load of hard to sand steel, so bring it to near finished before you have it heat treated if doing it by hand. If you have a grinder or sander to finish this is not a problem, just make sure you leave enough on the blade to take it to whatever grit you are going to finish it too.

Bob
 
Joined
Dec 27, 2001
Messages
729
Are you at Fort Drum? I never could find another knifemaker in the area while I was up there.

While I'm here, I tend to finish mine a little more, 220 grit before heat treat.
 
Joined
Dec 31, 2005
Messages
255
I usually finish with a 180-240 grit before HT. Then I do my clay coating. You'd better leave about 1-2mm on the edge because carbon may burn during HT and then you'll lose some, and therefore get a cutting edge that is less hard than you'd want. Then I complete the HT, grind, etch, polish, and have a beer when my new blade is finished Hmmm... :)
 
Joined
Dec 3, 2005
Messages
51
Whit, yes I am at FT Drum but I wouldn't call myself a knife maker. Just somebody that would like to be someday. Thanks everyone, I think I've got what I need. I think I'm going to go with a rougher finish when I get it treated and then hand finish. I'll be in Afghanastan in a little while so I'll have my wife send it to me and work on it while I have free time. I suppose I'll need something to do on my free time. Thanks everyone.
 
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