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Copper and nickel San mai blade


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Hi guys, 

 

So the time has come to make a copper San mai blade. I was thinking of doing a nickel outer shell. Then copper, then hardenable steel core. 

 

I'm open to any and all tips, recommendations, warnings, step by step of how you would do it, and what you would stay away from.

anything else that will help me with this new goal. 

 

Thanks so much in advanced. 

 

 

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I have forged a couple cumai blades. Be super careful with temperature. Copper melts at 1984 deg.F I have melted the copper out of a blade or 2. Stack your billet up, outer layers, copper, then core and weld all the way around to seal it up. If you do over heat it the weld will help hold the molten copper in. My only concern with putting nickel on the outside is it is soft and scratches kinda easy. Maybe 15n20 and polish it after etch might work. Here is one I'm working on now. It was a Damascus jacket, copper, and 1084 core.

20220113_213821.jpg

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13 minutes ago, Shane Atwood said:

I have forged a couple cumai blades. Be super careful with temperature. Copper melts at 1984 deg.F I have melted the copper out of a blade or 2. Stack your billet up, outer layers, copper, then core and weld all the way around to seal it up. If you do over heat it the weld will help hold the molten copper in. My only concern with putting nickel on the outside is it is soft and scratches kinda easy. Maybe 15n20 and polish it after etch might work. Here is one I'm working on now. It was a Damascus jacket, copper, and 1084 core.

20220113_213821.jpg

Wow looks amazing! But now... I have a question. It seems you have some copper at the hilt on the edge. Is there any way for that not to happen? 

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