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HSS knife

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HSS knife

Postby manu de hanoi » Tue Mar 15, 2016 9:09 am

IMG_4281.JPG
I just made an HSS (T1 grade) knife. That's an alloys used to *cut metal*. So hard that it took hours to make this amateur grind on my big grinding machine. We'll see how it fares cutting bones in the mother in law vietnamese kitchen:
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Re: HSS knife

Postby Mud » Tue Mar 15, 2016 5:43 pm

Could it have been annealed first and re-hardened after shaping?
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Re: HSS knife

Postby manu de hanoi » Tue Mar 15, 2016 11:29 pm

yes, but I dont have an electric furnace. That's probably my next toy.
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Re: HSS knife

Postby Zymurgy Bob » Wed Mar 16, 2016 12:54 am

Manu, is it heavy and edge-angled like a cleaver, or lighter and with the narrow razor-edge of an Asian slicer?
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Re: HSS knife

Postby manu de hanoi » Wed Mar 16, 2016 1:22 am

it's a bastard, HSS being brittle, I had to make it shorter and thicker than the slicer, but I tried to grind the edge rather thin
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Re: HSS knife

Postby zedzedtop » Wed Mar 16, 2016 2:01 am

Good to see another knifemaker on the forums. I've had an e-kiln for a bit and just got a new grinder set up. A few blanks have been profiled but haven't toyed with the grinder much yet. Couldn't you find a local shop that has a kiln?

Not at your location, but the name creates a connection. I like the rustic style:

http://www.kitchenknifeforums.com/showt ... %C3%AA-Cao
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Re: HSS knife

Postby manu de hanoi » Fri Mar 18, 2016 12:35 am

zedzedtop wrote:Good to see another knifemaker on the forums. I've had an e-kiln for a bit and just got a new grinder set up. A few blanks have been profiled but haven't toyed with the grinder much yet. Couldn't you find a local shop that has a kiln?

Not at your location, but the name creates a connection. I like the rustic style:

http://www.kitchenknifeforums.com/showt ... %C3%AA-Cao

These knives in the link are rather refined compared to the medieval "slicers" in most Hanoi kitchens.
Carbon steel holds an edge better than stainless that's why they are still in use, vnese pple dont debone poultry they just chop it with the bone.

I also want a kiln to recycle copper scraps and experiments with alloys. The whole hardening thing started when I made steel conical shapes to reduce the diameter of ss tubes. It involves purchasing "C45" steel, turning it, hardening on a coal stove (takes ages to start coal), putting it in a hydraulic jack jig and the result looks like this, see how the outer jacket nicely shrinks to meet the inner
lieb detail.jpg


But I wouldnt toy with HSS hardening unless I have a proper kiln and a really repeatable process
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Re: HSS knife

Postby S-Cackalacky » Fri Mar 18, 2016 9:31 am

US knife makers - I have some railroad spikes that I would part with to someone who might want them for knives (or other). I think I have maybe 8 or 10 and some have the HC (High Carbon) stamped on the heads. If anyone is interested (no cost), please send a PM and I'll mail them out to you - ever how many will fit in a small USPS flat rate box.

Don't know why, but I bought them at a yard sale a few years ago. Seemed like a good idea at the time. I understand they make decent blanks for knives.
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Re: HSS knife

Postby Zymurgy Bob » Fri Mar 18, 2016 10:43 am

There may be high-carbon railroad spikes out there, but all I've ever had access to were old, and very low carbon, at least they acted like that with respect to (coke-fired) forging. They were a handy source of nice malleable iron for non-cutting tools, at least in my experience.
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Re: HSS knife

Postby S-Cackalacky » Fri Mar 18, 2016 11:58 am

Someone has laid claim to the spikes.

ZB, turns out that most of what I have are labeled with the "HC" (high carbon) embossed on the head. Someone posted on HD about using the HC ones for knife making. I don't know how rare they may be.
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Re: HSS knife

Postby Zymurgy Bob » Fri Mar 18, 2016 11:32 pm

I bet it's a matter of age. Most of the spikes I've played with were driven close to the turn of the last century,
Zymurgy Bob, a simple potstiller http://www.kelleybarts.com/zymurgy-bob- ... e-spirits/

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Re: HSS knife

Postby dutchmancreek » Sun Mar 20, 2016 1:43 pm

The HC on the head means it has a higher carbon level, but not really enough for knife making (can't remember the exact figures). I've seen a few "knives" made from them....some look good, but are better kept as letter openers.
Spikes are handy for some projects. I've got a five gallon bucket full under the bench in the shop.
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