Making a SHARP Aluminum bronze Kiridashi Knife

Рет қаралды 63,838

Жыл бұрын

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.
Please consider supporting me on Patreon. www.patreon.com/user?u=58360840 You'll receive access to patron only posts as well as 3d printing files
My new channel kzfaq.info/love/SnI...
------ Affiliate links -----
Scotch Brite Wheels amzn.to/38JmJgY
Polishing Compound amzn.to/3wHXof1
The best polishing wheels ever amzn.to/2VjG2GK
Overture 3d printer filament amzn.to/2UqwwRC
Some of my favorite hand files amzn.to/3lFzUDO
The die grinder I use amzn.to/3Aebg1c
Clear Coat - I love this stuff! amzn.to/2V71kYj
NeverDull metal polish amzn.to/3zumeiH
Liver of Sulfur amzn.to/3rIUBjz
Artillery Sidewinder X2 3d printer amzn.to/3KzJwZF
Elegoo Saturn 3d Printer amzn.to/3iGIPlw
Creality Ender 3 Pro V2 amzn.to/37sidiM
All of the links above are affiliate links. This means that, at zero cost to you, I will earn an affiliate commission if you click through the link and finalize a purchase.

Пікірлер: 171

@mathewritchie Жыл бұрын

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

@bethelgues3918 Жыл бұрын

Aluminum bronze is actually very susceptible to work hardening which is why it is often cast and not milled/machined.

@abryant5258 Жыл бұрын

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

@frigginpos Жыл бұрын

The knives were beautiful, but not the right material for a hardened edge. Nice video, and thank you.

@H0mework Жыл бұрын

There's many alloys of stainless, as well as this composition. This is commonly used in coins and as an iPhone "gold" color.

@Boosted98gsx Жыл бұрын

Stainless will always be harder than Al Br, but stainless being a more complex alloy has other issues. Al Br will be far more lubrous to machine than stainless, and won't burn up your inserts / endmills in case you need to do any post process machining. SS has a habit of cold working and burning up carbides, even in flood coolant. Stainless can't really be cast without an inert atmosphere either. Otherwise O2 will burn out the alloying elements, and then you have to deal with hexavalent chromium as well.

@Hannah_The_Heretic Жыл бұрын

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

@alwayscensored6871 Жыл бұрын

Oz n Kiwi $1, $2 coins are made from it. But I am not melting down $300 of coins for a blade, haha.

@ethanhumphrey5758 Жыл бұрын

@@alwayscensored6871 Plus it is illegal to deface Australian coins

@SmokeyJoe42098 Жыл бұрын

@@ethanhumphrey5758 same in the USA except for in a project like this - money can’t be defaced for intention of defrauding someone, or increasing the face value. I don’t know if Australia is the same but in the US we can make art with coins (hence the penny press novelty machines)

@howardosborne8647 Жыл бұрын

It is quite commonly used in marine applications for shafts and heavy duty sleeve bushings. It is surprisingly robust considering how soft the parent metals of the alloy are.

@ethanhumphrey5758 Жыл бұрын

@@SmokeyJoe42098 Australia is different- technically you are breaking the law if you melt a coin.

@Charlielizard Жыл бұрын

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. 👍🏻👍🏻👍🏻

@thunderbasilisk1352 Жыл бұрын

These knives look amazing!

@BakeBakePi 8 ай бұрын

The blade looks so cool! Great video!

@AndiNewtonian Жыл бұрын

Very cool! I love the design, and the way the sharpened edge blends into it.

@wantafastz28 Жыл бұрын

Looks great

@rachelg552353 Жыл бұрын

It’s always so exciting when you open up the molds!! Look great!!

@coupdegenie51 Жыл бұрын

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

@howardosborne8647 Жыл бұрын

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

@MoneyCrespin 5 ай бұрын

I totally want one!

@carrestore Жыл бұрын

Nice work 👍

@TheJCJexe Жыл бұрын

Awesome! Would make a nice box opener.

@jbprospector3638 Жыл бұрын

Those can out awesome. Love the texture. 👍

@freemanmetalworks1698 Жыл бұрын

I love that hammered look.

@BUZZKILLJRJR 8 ай бұрын

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!

@MrRowskey Жыл бұрын

Amazing

@CKILBY-zu7fq Жыл бұрын

Nice build brother,

@justsluiceit Жыл бұрын

Great job Robinson !! Just Sluice It !!

@BR5494 Жыл бұрын

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

@dangerousandy Жыл бұрын

Nice job on those. Penny is adorable 😍

@jerrodbroholm4338 Жыл бұрын

Great video, as always. That casting was incredibly nice.

@my1956effie Жыл бұрын

They look great. 👍👍

@judechandler5102 Жыл бұрын

Beautiful

@drstrangefart Жыл бұрын

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.

@Serbianguy432 Жыл бұрын

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.

@Smallathe Жыл бұрын

Very cool project!!!

@Kenny.6807 Жыл бұрын

Nice one 👍

@jimmy_valin5186 Жыл бұрын

I always get so excited when you post a new video!

@maneotis4g63t Жыл бұрын

Those are dope

@andywolf3205 Жыл бұрын

Penny- Super. Good work. :)

@rolo1632 Жыл бұрын

Love your videos man keep it up! 🔥

@PlagueOfFear Жыл бұрын

Nice!

@johnjude2685 Жыл бұрын

That shape is good to mark lines on wood

@toomsx 10 ай бұрын

Nice 👍

@josefmildner7665 Жыл бұрын

Awesome video, I need one of those knifes. Congratulations 🎉 by the way. Great video, welcome back.

@G.A.N. Жыл бұрын

That is very nice and simple, it begs for having more like this, yet it seems quite uncommon

@walter2990 Жыл бұрын

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!

@ethansoliga4045 Жыл бұрын

Hello Penny 👋. 🐶👍

@shabananaeem1917 Жыл бұрын

Nice 👍👍

@GermanDarioCarte Жыл бұрын

Excelente

@earlt612 Жыл бұрын

He's back

@quincyfellows2636 4 ай бұрын

Made a bronze dagger like this is RuneScape or something lol. Great vid

@bomas2578 Жыл бұрын

Awesome knife skills and all but the best part is the dog.

@jeanladoire4141 Жыл бұрын

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)

@autumn5592 Жыл бұрын

Not saying I don't believe you, but could you provide a source or some info on that? I'm just an intrested knife maker. 40 Rockwell seems pretty crazy for a copper alloy, seems like it could be cool to tinker with.

@jeanladoire4141 Жыл бұрын

@@autumn5592 check out CuAl15Fe5 alloys, they are pretty uncommon, but they are used to make litteral stamps in machines, like they cut sheets of steel and titanium with that. If you're really interested i have pdf engineering pdf documents about the martensite structures in cupro aluminum alloys, But if you want the very hardest bronze, wich is at 50 rockwellC of hardness after quench, you can look for CuBe2 (copper and 2%beryllium)

@capatainnemo Жыл бұрын

they will be ok as marking knives

@vince8723 Жыл бұрын

nice. love the look. what is the hardness of it i wounder.

@Vault57 Жыл бұрын

Nice concept for EDC if someone worked in an area where nonsparking tools were required.

@I.no.ah.guy57 8 ай бұрын

I want one lol Would those be able to be hardened?

@bbrachman Жыл бұрын

Similar to how we did 'lost wax' casting a long time ago. I am wondering if cast metal has to be quenched and tempered like other knife metals.

@Rias-Gremory-a-gamer Жыл бұрын

A suggestion next time you drill threw metal it be a good idea you use cutting oil give you a nice drill cut and cleaner one.

@KingKhiGaming Жыл бұрын

We need people like him in a apocalypse situation's

@dougdoggerson9353 Жыл бұрын

Cute dog !!!

@omidram5889 Жыл бұрын

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

@williaty Жыл бұрын

Can you do a video about the modifications to your belt grinder?

@stuffbywoody5497 Жыл бұрын

What I'd like to know is how the edge would hold up against leather. I do a mix of different old school arts like blacksmithing, wood working, leather work and several others. I use these mixed skills to make tools and a large variety of other useful items and some ornamental/aesthetic goods as well. I have been contemplating adding some smelting into the mix as well to broaden the skill set and add a bit more variety to the outcome of the items I make. So, yeah, how would the edge hold up to leather as a cutting or bevelling tool?

@sirfer6969 Жыл бұрын

Nice work as always...Alu bronze is what a lot of "gold" coins are made of these days, it's strong stuff

@BigBaHemith Жыл бұрын

I still prefer when he does the lost pla methods

@UniverseUA Жыл бұрын

Awesome video, can you try and make manganese bronze?

@kevinwatson5833 Жыл бұрын

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

@FearsomeWarrior Жыл бұрын

Recommend making a edge profiling jig for belt sander. I had made one and still managed to have a blade fly out of my fingers while free-handing to touch up the last spot on a blade.

@adamtwelve Жыл бұрын

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

@larrysimmons6082 Жыл бұрын

Where did u get the belt grinder.?

@GoderikCristobal Жыл бұрын

Hey man, this was amazing work! Do you mind telling me where you got that fancy hand crank siv? I'd really like to get one of my hands on that.

@wolfd89 Жыл бұрын

Love the minimalist design coupled with the dimples. It looks like a ball pin hammered copper sheet. Maybe invest in a dedicated grinder angle jig. Most other KZfaqrs who make knives have these to get a perfectly consistent angle on both sides.

@ascendintegratedtrainingch1784 9 ай бұрын

Do you do commissions?

@ajhproductions2347 Жыл бұрын

I didn’t know Aluminum Bronze was a thing until finding this video

@aboodabood116 11 ай бұрын

Is it safe to use with food

@congoballs9725 7 ай бұрын

you should also add some nickel makes it more gold has more of a shine to it

@bradmyst1339 Жыл бұрын

I think that you have heard of this but if you work harden (hammer the edges) your edges you get a stronger edge.

@richerworldproductions Жыл бұрын

This Aluminum Bronze sounds perfect for my application! How do you figure out the ratio of copper and aluminum? is it by weight, or volume?

@acmarston 9 ай бұрын

Would also be interested to know this.

@vidznstuff1 6 ай бұрын

Weight

@xenoz666 11 ай бұрын

Would this alloy work to melt copper hammers into new hammers, increasing the durability but still notnallow for sparks when hitting steel? Got around 20kg of copperhammers that are in bad share and going to make new ones.

@sleepib Жыл бұрын

Might benefit from work hardening the edge before sharpening it.

@dominicmurar8427 Жыл бұрын

May be a dumb question but what do you do if you notice some loose/ not compacted sand after you put your mold in or does this never happen

@TheJedihunter 8 ай бұрын

From what i understand with my years of cooking you should try to run your blade the same way on the steel going opposite directions will have the sides of you edge miss matched more like a micro bread knife

@idk83153 Жыл бұрын

make a bolt that, in order to open/close, you need to go up, then down, then up, then down again and going like that

@projectdirtbikes Жыл бұрын

Man those things are sick! What breed is Penny?

@look4lec Жыл бұрын

What do you think the total time was on these?

@aries502 Жыл бұрын

woop

@jasonlabrecque8852 Жыл бұрын

Hello Mr. Robinson, I have been casting some alluminum bronze parts for a little bit (10% Al tends to also be my go to). I had watched your previous blade video as well, and was wondering if there is a specific reason why you decided not to work harden the blade your second time around? Is the difference in edge retention noticeable?

@jeanladoire4141 Жыл бұрын

aluminum bronzes can be water quenched, just like steel. they start reacting to water quenching starting at 9% aluminum, and their hardness after quench increases up until 15% aluminum where it starts becoming too hard and brittle to make anything with. I recommend you try making a bronze with some iron and nickel sprinkled into the mix to toughen it and make its martensite structure finer and tougher. Water quenched aluminum bronze (followed with a temper) don't require hammering for hardening !

@ThompsonJustin1 7 ай бұрын

Is the 90/10 ratio of copper to aluminum done by weight or volume? Aluminum weighs much less than copper

@maneotis4g63t Жыл бұрын

Can you work harden this Bronze?

@SmokeyJoe42098 Жыл бұрын

Yes you can, and you can heat & water quench them and rework them unlike steel alloys!

@CoalCoalJames Жыл бұрын

You probably already know this, but you can possibly cold temper (work hardern)the blade to get it even sharper... from what I've seen a little effort gets great results for softer metals.

@autumn5592 Жыл бұрын

Tempering and work hardening are 2 totally different things.

@aaronh.7672 Жыл бұрын

Is it still possible to heat treat those blades or is that kinda pointless

@Hakan-mz6pd 5 ай бұрын

looks great, but a Kiridashi is only one edge ground, it is so you have a flat side for marking, it is a wood working knife after all

@carlosschagun6922 Жыл бұрын

The next time you make a blade or cutting tool try with Beryllium Copper.- It is very strong and hard...

@streetguru9350 Жыл бұрын

Main benefit is probably that they aren't magnetic. Might be an interesting alloy for bullets though too. Or maybe even just the casing for higher pressure ammo like the new 6.8mm rifles, you should try to make some to send off to the firearms channels.

@user-iq2uw5ow4j Жыл бұрын

Weapon manufacturers have long tested all alloys. And this alloy is not a surprise for them.

@marcins5584 Жыл бұрын

I am looking for a cheaper and more available in EU alternative to SUSPENDA SLURRY

@littlehills739 Жыл бұрын

Kiridashi was spoused to be chisel point to make next to ur rule right?

@autumn5592 Жыл бұрын

Yes, traditionally Kiridashi are chisel grinds/single bevel. They can be double bevel (ground on both sides meeting in the middle of the blade.) The problem is he introduced secondary bevel this will mean marking lines are slightly off, it should have been a zero/scandi grind. I don't think it will matter much in the way of actual usability though, and the microbevel will introduce some edge stability (reducing bending/dents.)

@thetermite72 Жыл бұрын

You might want to tilt your Lazer and let that big air bubble out of the tube. It will last longer

@Sam-gf1eb 11 ай бұрын

I have a question. Why do you make the bevel by sanding? Wouldn't it be smarter just to have the model being casted already have a bevel? You can also do the bevel most of the way but not fully if you want to sand it. It will save time. What's the point of using bronze into a mold if you can use the same exact method to make it out of steel?

@marcg2233 Жыл бұрын

awesome video, just an Idea as a marketer, please look up "Naruto kunai" and make a pair with this style, you will hit a whole new demographic and this should help the chanel

@seanfoltz7645 Жыл бұрын

90 copper/10 aluminum is pretty close to Nordic gold, which is 89 copper, 5 aluminum, 5 zinc and 1 tin - would you be willing to recast those blades using Nordic gold to compare sharpness and hardness - maybe do some forged in fire style tests?

@haljitw2348 Жыл бұрын

I'm not sure you did this, anyway Google said that al-bronze can be quenched to strengthen it.

@BCM1959 Жыл бұрын

They are pretty and semi-functional but more of a novelty than anything. Given the choice a steel knife wins every time. Try making one with a carbon steel piece for the edge?

@markwilson8632 Жыл бұрын

It’s more about the casting and making a very strong knife, not forging.

@BCM1959 Жыл бұрын

@@markwilson8632 I'm kinda slow sometimes... Historically speaking you are a master craftsman. In today's terms that holds true.

@alwayscensored6871 Жыл бұрын

I wonder if Titanium, Copper would work?

@davidgillies620 Жыл бұрын

Titanium copper (usually something like 97% Cu 3% Ti) is strong but far too soft to make a knife.

@alwayscensored6871 Жыл бұрын

@@davidgillies620 Gold, Platinum alloys can be very hard too. Bronze is Copper/Tin. Brass is Copper/Zinc. Alloys can have extra like silicon etc.

@davidgillies620 Жыл бұрын

@@alwayscensored6871 There's hard, and then there's the 55-60 RHC hardness you need to make a knife blade that will take and keep an edge. Steel is still usually the best choice. It's the carbides (iron carbide in the main, but also incredibly hard materials from the alloying agents like vanadium carbide and molybdenum carbide).

@alwayscensored6871 Жыл бұрын

@@davidgillies620 They keep saying the Eygptians only had copper tools. They ignore the Tin trade that even got Tin from South America. Some Bronze alloys are as hard as steel. Iron is soft compared to them. Material science are just now using AI to predict properties of metals of three or more elements. New or old formulations will be made. I am old enough to remember the first of the new Damascus blades, they said it would never be done, till it was.

@Nicknamed030 Жыл бұрын

These knives look great but i feel like the knife would slip in your hand after alot of hard cutting like cardboard. Seems kinda dangerous without a wooden handle to give grip