Making a SHARP Aluminum bronze Kiridashi Knife

In this video I will be showing you how I made Japanese Kiridashi style knives out of aluminum bronze. These knives were made using the lost foam casting method. Thin Styrofoam was cut on a laser cutter and then a sand mold was made. Aluminum and copper were mixed together in a crucible to make aluminum bronze and then poured into the sand mold.

Casting equipment

3d printing FDM

3d printing Resin

Belt Grinder

Belt Grinder Accessories

Welding

Metal finishing tools

General

Some of my favorite tools of the year

Camera Equipment

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[robinson-foundry]

If you're interested in any of the tools or equipment I use and you want to help support the channel then don't forget to check out some of the affiliate links in the video description. Thank you for the support!

[abryant]

I'd love to hear more technical details and comparisons to stainless steel. This is one of those alloys you don't hear a lot about, but it's impressive when you are first introduced to it

[mathewritchie]

Not sure about aluminium bronze but most copper alloys tend to work harden so hammer peening the edges should give better edge retention.

[Charlielizard]

Those blades turned out fantastic. Casting foam worked out great. Especially with the pattern. Looking forward to watching more videos with other alloys. Still amazed at how the edge held up to the cardboard. 👍🏻👍🏻👍🏻

[Hannah_The_Heretic]

Ive never even heard of aluminium bronze before, thanks for the video!

[kevinwatson]

Something to try beat the blade edge before grinding to work harden out of the mold ALBronze is in a soft state

[Serbianguy]

The knives came out great. Your fusion of ancient techniques with modern technology always provides for a video that entertains and educates. Keep up the good work, your videos are a joy to behold.

[BR]

Job.well.done.awsome.looking.
Knifes.BRAVO 🏴‍☠️🇺🇲😃

[walter]

Although I'm not a Knife Smith, I have a great friend who is..., my personal hobby is melting metal. I'm going to cast my buddy, several of this type of blanks for his hobby. I'll try to cast some larger blades using your method. It'll be a little surprise for him.
Thank you!

[coupdegenie]

thanks again for this new video, sharing your knowledge and experience and very inspiring.

[BUZZKILLJRJR]

I love it!
I made lost wax molds when I was in high school but this is very cool never heard of lost foam till now it's awesome!

[johnjude]

That shape is good to mark lines on wood

[TheJCJexe]

Awesome! Would make a nice box opener.

[jeanladoire]

hey, french blacksmith here ! I have a bit of experience in forging aluminum bronze. It can make surprisingly decent blades if worked properly. Know that you can actually QUENCH and TEMPER aluminum bronze, just like steel ! Aluminum bronzes with 15% Al can actually have a hardness of 40 Rockwell, wich is just huge for a copper based alloy (and multiple times harder than structural steel, stainless steel, or even poorly hardened carbon steels). That being said aluminum bronze has some restrictions, and forging it is very hard for a beginner. But if you make researches about it, you will find surprising results. If you make your alloy yourself, keep iron and nickel on hand for grain growth stabilization and toughener, and check the most common recipes (like CuAl15Fe5Ni5)

[UniverseUA]

Awesome video, can you try and make manganese bronze?

[dangerousandy]

Nice job on those.

Penny is adorable 😍

[adamtwelve]

I think you're still supposed to work harden aluminum bronze just like other bronzes, would make the edge last longer.

[drstrangefart]

MAN THOSE CAME OUT BEAUTIFUL. I love a good kiridashi as a general purpose small carry knife. I made myself one out of the first damascus steel billet I made.

[howardosborne]

I like the design of these. They turned out spectacularly good.

[omidram]

Hey great to see using belt grinder. I’ve to mention that you should point your knife downwards and grind the spine otherwise the point might get caught into belt and shoot the whole piece toward you! Stay safe 4:55