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San Mai Kitchen Knives

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Joshua States
Posts: 1157
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So, I decided to give this a go and over the last few weekends, I have found some time to devote to it.

Here are the progress pics so far.

I started with three pieces of .187 by 1.5 by 6. cleaned the surfaces with an angle grinder and scotch-brite wheels.

Then, into a drill vise and TIG welded the edges closed.

The initial welds are done in the press. 3 complete welding passes.

Then I ground the edges clean to inspect the welds.All looked good and then a few subsequent welding passes were done in the power hammer with flat dies.

I did some preform forging, drawing the end down into a long taper.

I decided to forge the bevels in to get the width I needed (I like a little over 2 inches for big kitchen knives)

Satisfied with the rough profiles and sizes, I went to rough grinding and HT.

Finish grinding to 320 grit and hand sanding to 400 grit. I got two of them ready and fitted with a 410 bolster/guard.

That's where it stands as of tonight.

I did learn a very important thing about forging the width out and the bevels thin. It moves the decarb line down very close to the edge.

I'm not sure yet if that's a good thing or a bad thing...…..

You cannot see the line yet in the photos.

Joshua States

www.dosgatosforge.com

https://www.youtube.com/channel/UCdJMFMqnbLYqv965xd64vYg

https://www.facebook.com/dos.gatos.71

Also on Instagram and Facebook as J.States Bladesmith

“So I'm lightin' out for the territory, ahead of the scared and the weak and the mean spirited, because Aunt Sally is fixin’ to adopt me and civilize me, and I can't stand it. I've been there before.”

 
Posted : 21/10/2018 10:58 pm
Karl B. Andersen
Posts: 1067
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Yes, you need to be very careful when forging San-mai. On my ABS style knives, I do forge down my choil/ricasso and draw out my tang, but the tip is ground stock removal so as to keep the middle in the middle and when I finish grind the transition line remains high.

Karl B. Andersen

Journeyman Smith

 
Posted : 22/10/2018 7:20 am
Posts: 197
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Thank you for sharing Joshua, keep us posted throughout the process please.

 
Posted : 22/10/2018 1:53 pm
Joshua States
Posts: 1157
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Topic starter
 

Bit of an update. Got the two blades though the first etch and polish.

The top one is after etch and washing with water. The bottom is after polishing with Blue magic

Here's a closer look at the one right after etching

How are other folks finishing these off? The bottom one kind of lost the transition band after the oxides were wiped off. The other one kept some of it, but some of it faded away.

You can see it is fairly bright in the second photo.

Joshua States

www.dosgatosforge.com

https://www.youtube.com/channel/UCdJMFMqnbLYqv965xd64vYg

https://www.facebook.com/dos.gatos.71

Also on Instagram and Facebook as J.States Bladesmith

“So I'm lightin' out for the territory, ahead of the scared and the weak and the mean spirited, because Aunt Sally is fixin’ to adopt me and civilize me, and I can't stand it. I've been there before.”

 
Posted : 09/11/2018 10:41 pm
Joshua States
Posts: 1157
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Topic starter
 

Next update: Not satisfied with the etch and the activity in the weld zone, I tried a Salem Straub method of etching and came up with this. There is some wild figuring coming through the 410. Sort of shadowy ashi like wisps.

Attached files

Joshua States

www.dosgatosforge.com

https://www.youtube.com/channel/UCdJMFMqnbLYqv965xd64vYg

https://www.facebook.com/dos.gatos.71

Also on Instagram and Facebook as J.States Bladesmith

“So I'm lightin' out for the territory, ahead of the scared and the weak and the mean spirited, because Aunt Sally is fixin’ to adopt me and civilize me, and I can't stand it. I've been there before.”

 
Posted : 11/11/2018 9:50 pm
Joshua States
Posts: 1157
Member
Topic starter
 

All three are done and just in time to get to the show this morning

Joshua States

www.dosgatosforge.com

https://www.youtube.com/channel/UCdJMFMqnbLYqv965xd64vYg

https://www.facebook.com/dos.gatos.71

Also on Instagram and Facebook as J.States Bladesmith

“So I'm lightin' out for the territory, ahead of the scared and the weak and the mean spirited, because Aunt Sally is fixin’ to adopt me and civilize me, and I can't stand it. I've been there before.”

 
Posted : 16/11/2018 11:11 am
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