Making Mokume from 1010, 1085 and copper

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Mar 26, 2004
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Hey folks,

I'm almost done remodeling my shop, so I'm taking 15 days off that tedious work to keep making new knives and fullfill some orders. I'll be posting more finished knives and process pictures soon!

I've been asked how I made a mokume using iron, steel and copper, so here it is!


One clarification before I start, though. I'm referring to 1010 as "iron" because of its low content of Carbon. The proper term for it in English would be Low-Carbon Steel.

If I'm mistaking terms here, please a fellow knifemaker correct me :)

The concept between this is to use steels with different Carbon content, as that will make the difference in the final colors after etching, just as on a regular damascus blade.


The first pictures are a recreation. I just took some pics to clarify this process, as I didn't take any of those stages when I was really making it.


First I bend a 0.8mm thickness piece of steel into a "U" shape. If you use a galvanized or stainless steel plate you can remove the resulting mokume piece more easily. I just use a regular steel and then grind it off.

mokumemaking1_big.jpg



Then I fill that space with 0.3mm thickness layers of 1010 and 1085, alternating them. Not too tight as I need space for the copper to get in between.

mokumemaking2_big.jpg



After that, I place a lot of borax on top of the layers and place some pieces of copper there. (Remember this is a recreation, so I didn't actually place borax there for the picture)

mokumemaking3_big.jpg



Then I take that to the oven at 1200C and when I see the copper gets into liquid state and flows in the spaces between the steel layers, I add more copper pieces to ensure this melted metal fills in all the free spaces between the 1010 and 1085 layers.

After I've attained that, I took it off the oven and press it on the hidraulic press.

(When you rotate the U shaped piece with the melted copper between the steel layers you won't spill it all as it's not that much liquid and due to superficial tension it tends to remain there)

When pressed, some copper will drip away, but it's not much.


This is a piece of the resulting ingot, after pressing it and cut to aprox desired size.

mokumemaking4_big.jpg



Now this is how it looks after I take that piece and grind some section and etch it like regular damascus to show the contrast generated by the different materials.

mokumemaking5_big.jpg



This is a final piece of this mokume, ready to be used for whatever piece you want to make out of it.

mokumemaking6_big.jpg


mokumemaking7_big.jpg



And this beautiful guard is what knifemaker and friend Ruben Calo made out of it!

sessum6_big.jpg


sessum9_big.jpg




I hope this helps, any further questions, please don't hessitate making them!

Regards,

Ariel
 
Very cool process. What kind of oven are you using, and what kind of atmosphere in the oven? The few times I've tried to melt copper i was happy to escape with my health. :D
 
You never cease to amaze me -- fantastic work. Ruben did a great job of utilizing the mokume with his guard too. :thumbup:
 
That is awesome! I also liked the coppered damascus push dagger you made. It's been some time ago, but the tutorial was excellent. I have to say, however, that THIS is much cooler!:thumbup:
 
Looks fantastic, but you would really use something galvanized for the container? Isn't that just asking to get sick or worse?

-d
 
Thanks Ariel. Very interesting. Thanks for sharing.

Ariel can this same thing be done in a regular cannister with a lid and not need to use flux?
 
Thanks for the kind words, gentlemen!

Bruce, yes it can certainly can, that's how I used to make it when I hammered it instead of using a press :)

Ariel
 
very nice indeed. just a question is it possible to make mokume with copper and stainless steel? or wont it work because of the chromium, need higher temps?
 
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