Difference between heat treat and no heat treat?

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synthesist said:
The derision heaped on that individual in that other forum was subtle but massive............... BladeForums is sooooooooooooooooooo civilized. I'm proud of y'all...
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Actually missed a bit of derision though, especially since this is so clearly trolling.

Waiting for the "Difference between blade and handle?" follow up post. ;)
 
Patrice,

But if you hold the knife by the spine of the blade, doesn't the blade then become the handle? Can anyone explain that to me?;)
 
DavidL41 said:
Ev13wt that was what I was looking for, case hardening. Thanks.
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you could try case hardening, down and dirty with a torch to test out your application.
I don't think you want to get into a casting. Even if you did it the inexpensive way with a sand casting, you have gates and risers which cause shrink and porosity (voids)
I'm thinking you can buy commercially available steel in the alloy/content you want and try flame hardening.....
Unless you have alot of quantity requirements, it's too expensive to overcome the minimum lot charges to make a casting.

your question of - "steel would start from liquid so when can it be heat treated if at all"
when the casting is cool and the gates ground off, the part is often sent to be heat treated depending on the customer's requirements/application and of course the alloy.
Usually a casting will be annealed (normalized for machining)
Castings also have a rough surface which needs to be machined or sanded.

I don't know if this helps you or not, but that's what I know.
 
I don't think he is trolling. Perhaps, he could take more initiative in looking into things for himself, before asking us spoon feed him... but I don't think he is putting us on.

His post history does not look trollesque.
 
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Really Stacy? Anyone who has read for more than 5 minutes about the subject can really ask these questions? If it's the case, than I apologize.

Now back to the serious stuff: Laurence, now I want to make an upside down knife. ;)
 
A little off topic but in the spirit of things ;0)

[video=youtube;HxP7Z-ks-1k]https://www.youtube.com/watch?v=HxP7Z-ks-1k[/video]
 
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Patrice Lemée;14612573 said:
Now back to the serious stuff: Laurence, now I want to make an upside down knife. ;)
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I've made a couple of those actually. A Vietnam Vet wanted a parer with the blade shape in the picture. The issue was he was missing the "F" you finger from his dominate hand. It got blown off in a fire fight with the enemy along with another bullet in his leg and abdomen.

Fortunately he not only survived he could still walk with a bit of a limp. Now what to do about that missing finger? Because as I watched him handle one of my parring knives he was having trouble because of the missing finger when he worked the blade towards himself like peeling an apple.

So I flipped the knife upside down. So the inside curve of the handle would rest in his three fingers as he worked the blade towards him.

He is extremely happy with that knife and the bigger Chef knives he has had me make for him. Picture at the top of the paper he was using at my store. I couldn't find the picture of his with the cutting edge on the other side.
 
I used to make a parer with a reversed handle fairly regularly-angled up towards the spine so you could still hold it normally if you wanted. Pretty useful concept.
 
been a while since I check back on the forum. Trolling was coincidental..

I couldn't wrap my head around heat treating steel from the videos I have watched online, where they went in-depth talking about the structure of the steel, rc hardness, what temperature was necessary and the subtleties of oil quenching vs water quenching. I looked into the process more thoroughly and now understand it better..

I will be buying a kiln and other equipment for forging metal hardware, and am interested in buying japanese hand planes. So theres an opportunity to be able to make japanese hand plane body out of steel (now just the sole because of weight).

A lot of hand planes use cast iron bodies, would that be the steel that I should buy in bulk to create prototypes with
(are they reasonable for a beginner to heat treat?)
 
Lets just let this thread go away. The OP has a lot of learning to do and needs to read the stickies and a lot more =before he takes on a project like this.

I will close this thread as it has little useful purpose left.
 
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