Split steel

Gossman Knives

Gossman Knives

Edged Toolmaker
Knifemaker / Craftsman / Service Provider
Joined
Apr 9, 2004
Messages
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I was drilling a lanyard hole in a piece of S7 steel and it split around the tang where I was drilling the hole. Anyone ever experience this bizarre occurance?
Scott
 
It thought it was a piece of wood !! I'll bet you had alloy banding there perhaps even a stinger of inclusions or carbides .
 
mete, does this mean there is something wrong with the steel? I went ahead and heat treated it and it's being tempered as I write this. I'll keep it as a beater.
Scott
 
I called the company I bought it from and from talking to them I probably overheated it while grinding or drilling. I thought I'd pass that along to others so it doesn't happen to anyone else. I usually keep it cool, but one can get by you once in awhile.:(
Scott
 
Steel companies never make bad steel just like users never heat treat it wrong !!
 
mete said:
Steel companies never make bad steel just like users never heat treat it wrong !!
Click to expand...
hehehe, you got that right.:D This happened before I HTed it. The hardening didn't change the split and so far the tempered hasn't affected it either.
Scott
 
You didn't overheat it enough by drilling it. Mete's right. You have a bad seam of something in it. I would recommend against selling it. It's hard but sometimes you just have to take a blade that seems OK but has hidden problems, out of circulation.

Skill is important but reputation is everything.
 
Don it is going to the scrap pile. I would never sell anything that had a problem like that. I just HTed it because I had another blade to HT anyway. I may use it as a beater knife around the yard.
Fred, S7 is air or interrupted oil quench. The guy I talked to also said sometimes when steel is made it may "laminate".
Scott
 
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