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The Newbies Arena Are you new to knife making? Here is all the help you will need.

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  #16  
Old 11-15-2013, 12:05 PM
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WynnKnives WynnKnives is offline
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At first I was thinking alloy banding, but as Crex suggested normally banding occurs with lines and strange patterns. So now I'm thinking, and I didn't see anyone ask this yet, what about possible decarb? Or possibly something else in the HT process? I can't remember what your HT setup is but maybe it's possible that you got some atmospheric action playing here? Maybe? I dunno? Just throwing ideas out.

Eh... edit... I just remembered you do most of your grinding post-HT... so probably not decarb. I dunno, maybe something happened during the HT/Quench where you didn't get a full change over molecular-ly?
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  #17  
Old 11-15-2013, 12:34 PM
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Yes, this blade was ground post HT so decarb shouldn't be it. The HT process was my usual process with no surprises and the blade Rockwelled as expected. Whatever the effect is it is evenly distributed and visible on both sides so it appears to go all the way through without any splotchy areas or any change in size of the dark and light spots.

So far, I haven't been able to find another piece of steel that I can be sure came from the same bar ...


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  #18  
Old 11-15-2013, 10:24 PM
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Definitely doesn't look like typical alloy banding.

Is there any chance your etchant might be contaminated, or the blade was sneezed on right before you stuck it in?


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  #19  
Old 11-16-2013, 04:27 AM
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Never had a "differential" issue in the same bar of O-1. 1095, 1084 and 5160 yes - mostly in 1095. Not saying it can't won't don't in O-1, just haven't seen it. I etch most of my blades in WV just to remove scale as I forge all my blades.
Hope you figure it out Ray, keep us posted.


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  #20  
Old 11-16-2013, 08:28 AM
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The vinegar was fresh, just opened the bottle. The blade is 12" long and nearly 3" wide - if I sneezed enough to cover that on both sides my dessicated body would still be on the shop floor ....


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  #21  
Old 11-17-2013, 03:24 PM
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Quote:
Originally Posted by Ray Rogers View Post
- if I sneezed enough to cover that on both sides my dessicated body would still be on the shop floor ....
LOL !!!!
ahhhh-chewwwwwy


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  #22  
Old 11-17-2013, 03:48 PM
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I ran this past Kevin Cashen and he said he had no metallurgical explanation for it. For now, this must remain one of knife making's great unsolved mysteries .....


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  #23  
Old 11-17-2013, 03:57 PM
Hurley Hurley is offline
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call Myth-Busters!............lol


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  #24  
Old 11-18-2013, 10:27 PM
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The sneeze thing was funny!

If Cashen has no clue, it may indeed remain a mystery.

Another possibility: the blade is possessed!

Finally: Aliens.


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  #25  
Old 11-18-2013, 11:15 PM
Imakethings Imakethings is offline
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Hey Ray,
Do you mind if I re-post this on an engineering forum? I want to see what some fellers with alphabets behind their names think is going on here.
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  #26  
Old 11-19-2013, 08:45 AM
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Marc,

Go ahead.

Jack,

Aliens are a possibility for sure but I was thinking Shop Imps .....


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  #27  
Old 11-19-2013, 05:30 PM
Imakethings Imakethings is offline
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Right, I've posted this and emailed the photo to some other fellers to try and figure out what is going on here. I'll throw up a link to the post once it's up.
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  #28  
Old 11-20-2013, 08:27 PM
Imakethings Imakethings is offline
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Reposted at http://www.finishing.com/594/65.shtml

I'll update with any theories they have.
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