Burn marks near edge of blade

xiuxiu1313

xiuxiu1313

Gold Member
Joined
Sep 14, 2010
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How big of an issue is buying a knife with discoloration on the blade edge presumably caused by the sttel getting too hot during seconday grinding? Is it merely cosmetic or is the heat treat affected?
 
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So just use it and don't think about it
You'll cover that area cosmetic wear and tear and won't notice it eventually
If it really frightens you get some flitz and polish the area
Or take a look at some your kitchen knives
I bet they're a sore sight but they still work yeah?
 
I've heard that there is often burnt steel at the very edge of the edge due to final grinding. It does seem as if that might be hard to avoid, at least to a tiny degree.
When that is spoken of, I also hear that it is gone after a sharpening or three. If your edge doesn't hold, sharpen a few more times and see what happens.
Just what I've heard. I might be wrong. Your milage may vary. Please don't shoot the piano player.
 
I had much greater discoloration thhat was blueish on the tip of a Benchmade Spike. I sent it in they said it was overheated during final grinding and replaced the blade.
 
This is the kind of crap that infuriates me - obvious visual defects that should have been caught. I don't care who the manufacturer is.
 
shane45-1911 said:
This is the kind of crap that infuriates me - obvious visual defects that should have been caught. I don't care who the manufacturer is.
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I really don't think it's going to affect use
I got all kinds of visual imperfections on my karesuandos, perforations or light scored dashings on the spine, various light and faint scrapes, and I bought enough of them to realize that's their manufacturing process, raw working finishes
While this is different it's not going to render the blade ineffective
 
ShaiHulud said:
I really don't think it's going to affect use
I got all kinds of visual imperfections on my karesuandos, perforations or light scored dashings on the spine, various light and faint scrapes, and I bought enough of them to realize that's their manufacturing process, raw working finishes
While this is different it's not going to render the blade ineffective
Click to expand...

A burnt edge most certainly affects performance, as the initial temper has been ruined by too much heat.
 
When I was younger and didn't know any better I would sharpen my machete on a bench grinder. The steel would get red hot, and the edge would discolor, looking just like that color.

I would take my newly sharpened (read:mangled) tool and whack it into a branch and it would immediately deform. After a bit of thought I finally realized what I was doing wrong.

I imagine those serrations are gonna flop all over after some use.
 
ShaiHulud said:
Hmm
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I agree. I passed on this one and found another of the same type.with none of this. The pic I posted above made it look a little worse because I bumped up the saturation so it would show well, but still, I would rather not take any chances so I will go for another
 
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