H.D. Primary Chain/rough ground blades

Fred.Rowe

Fred.Rowe

Knifemaker / Craftsman / Service Provider
Joined
May 2, 2004
Messages
6,848
These blades were ground from a sandwich made with 88 layer damascus outsides and a section of HD primary chain in the center.
One billet was given a slight twist the other was pressed in the sandwich form.
The blades were a challenge to heat treat. There were a lot of stresses in the billets.

Fred

anb.jpg


anc.jpg
 
I can't see the pictures????
 
i see them perfectly fine. only one of the blades has the outline of the chain showing. but they look so sweet. nice job man.
 
I like the bottom one best. That large, random pattern is just plain KEWL.

HT was a challenge, how so? Did they keep wantng to warp on you? How did you end up getting them so nice? Am I asking too many questions? ;)
 
GibsonFan said:
I like the bottom one best. That large, random pattern is just plain KEWL.

HT was a challenge, how so? Did they keep wantng to warp on you? How did you end up getting them so nice? Am I asking too many questions? ;)
Click to expand...

I spherodized these blades and they warped during that process. I "knew" that I would have trouble when it came time for the heat treat.
First of all, they were thinner than I would like when I did the heat treat.
I did three hardening cycles. The blades warped each time. I did the quick quench and straightened them before they cooled to 400fh and they warped after they cooled.
I learned something new in this process. The blades warped both length ways and the edge bent to one side. After the temper cycles, I clamped the blade in a wooden jawed vise, placed an oak block against the edge and straightened it using sharp blows with a 3 lb. hammer. I didn't know if this could be done; But I had nothing to lose, so I hammered away.
I wont hesitate to do it again, the next time I come upon a warped edge.
If you are seeking information, you can not ask to many questions. I am always happy to oblige.
Fred
 
I guess I didn't realize the changes could be that dynamic and dramatic. Thanks for the answers!

Now for more questions... have you tested those two? Does the top blade perform different from the bottom one?
 
GibsonFan said:
I guess I didn't realize the changes could be that dynamic and dramatic. Thanks for the answers!

Now for more questions... have you tested those two? Does the top blade perform different from the bottom one?
Click to expand...

These blades were, "learners". I was trying a new technique not really knowing what the results would be.
I will be making this style billet again soon. The next time, I will make the billet with wider damascus, the same width as the primary chain and use powdered steel to fill in the chain. There were some small inclusions in these billets.
The heat treat I did on the pictured blades was so erratic I don't believe testing the blades would give me any honest answers.
I intend to test the next blades I make using this technique.

Fred
 
Fred you did a outstanding job on the sandwich made with 88 layer damascus. And your photo's and work are A+------:thumbup: ---
 
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