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View Full Version : What's wrong with my knife?



augerpro
07-26-2013, 04:49 PM
I noticed a little flaw while sharpening my knife the first time, and today sharpening it again it seems more noticeable. Looks almost like a hollow spot on the steel?

http://i139.photobucket.com/albums/q288/augerpro/IMAG0023.jpg (http://s139.photobucket.com/user/augerpro/media/IMAG0023.jpg.html)

tripleq
07-26-2013, 05:19 PM
Can't see it that well on my phone. Might be an overgrind. What brand of knife is it?

augerpro
07-26-2013, 05:29 PM
My new Shigefusa :( Looks like it is about 4mm long by maybe 0.3mm tall.

DevinT
07-26-2013, 05:50 PM
It's probably a welding flaw or a split from heat treating.

Hoss

Dave Martell
07-26-2013, 06:49 PM
I can't see any detail.

DevinT
07-26-2013, 06:55 PM
look for the split on the edge right of center.

Hoss

JBroida
07-26-2013, 06:59 PM
i see what you're talking about, but from this picture, i cant be sure if its just unclear or if thats what it is

tk59
07-26-2013, 07:51 PM
Looks like an overgrind to me but it is not clear. Can we get some more angles?

augerpro
07-26-2013, 07:52 PM
Couple better pics

http://i139.photobucket.com/albums/q288/augerpro/IMAG0049.jpg (http://s139.photobucket.com/user/augerpro/media/IMAG0049.jpg.html)
http://i139.photobucket.com/albums/q288/augerpro/IMAG0050.jpg (http://s139.photobucket.com/user/augerpro/media/IMAG0050.jpg.html)

Justin0505
07-26-2013, 08:00 PM
Weird!
Looks almost like delamination, but its down past the cladding. Maybe some type of impurity in the steel?

For anyone trying to get a better view (and using a pc), you can right click on the image and pick "open in new tab"
Then hold down ctrl on the keyboard and scroll your mouse wheel to enlarge the image.

JBroida
07-26-2013, 08:10 PM
yeah... it looks like delamination, but the placement is odd. Maybe a problem with the steel, or maybe the most odd chipping i've ever seen.

Dave Martell
07-26-2013, 08:13 PM
Yikes! That's sure not something that you see everyday.

tk59
07-26-2013, 08:23 PM
Devin is right. I haven't heard of that happening on a knife that was iron clad... It's just like the knife that split on Bill a while back. I believe he posted pics of it. It split right down the center. That knife is probably toast.

tripleq
07-26-2013, 08:37 PM
Wow. Bummer. Is anyone aware if there would be any form of recourse with Shigefusa?

augerpro
07-26-2013, 08:43 PM
I've contacted the vendor so we'll see. They don't have any in stock and it appears they don't expect any until fall.

stereo.pete
07-26-2013, 08:44 PM
I'm sure Iwasaki would be very interested in examining a blade of his with a defect like this. I would contact the seller and see what options you have.

JBroida
07-26-2013, 08:45 PM
i totally missed the part where this was a shigefusa... sorry to hear about the problem. Sometimes things like this happen...and sometimes we miss them until its too late.

Justin0505
07-26-2013, 08:45 PM
I would work with the seller and have them contact Shig, to see what they want you to do. I know that you sometimes get weird behavior right at the edge on knives with very hard core steel and it sometimes takes a few sharpenings to get up into better, less chippy steel.
So you could see if it just sharpens out. But, if it was mine, I'd see what Shig had to say about it first.

tk59
07-30-2013, 09:46 PM
I agree with trying to contact the distributor/Iizuka-san and see if I can get a replacement. Sharpening out the defective part could be a LOT of work only to find out you're getting nowhere. That crack could be very deep and it could grow. To sharpen it out, you need to do it by thinning both faces of the blade. Not only is that time consuming (unless you send it to someone like Jon who has a water wheel) but you will no longer be using a Shig. You'll be using a knife with Shig steel that someone has essentially reground. The joy of using a knife made by a master is greatest before it gets much sharpening. That's when you're experiencing what the knifemaker intended. Good luck. I guess you can find out really quick by just grinding away the edge without thinning and then thinning later if you find the crack is gone at some point...

augerpro
07-31-2013, 03:29 PM
japanwoodworker is refunding me for the knife, no hassle at all! Just snagged the last one from maxim to replace it!

Justin0505
07-31-2013, 04:37 PM
That's good to hear. +1 JWW service!
Worked out well for maxim too.