Case-hardening the ancient way
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17-07-2017, 07:25 PM (This post was last modified: 17-07-2017 08:05 PM by ghostexorcist.)
Case-hardening the ancient way
I watch a lot of sword-making and metal-working videos on youtube. One particular youtuber, Clickspring, is attempting to build a working model of the Antikythera mechanism, an astronomical calculator built between 200 and 70 BCE.

https://en.wikipedia.org/wiki/Antikythera_mechanism

Apart from the main build videos, he uploads videos of him making the same kinds of tools that the original craftsman would have used at this time. The following video is a super interesting primer on case-hardening, the process of hardening metal tools that do not have enough carbon to harden like steel. Instead, charcoal made from leather is used as the carbon source and the item is hardened from the outside inward.



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17-07-2017, 08:15 PM
RE: Case-hardening the ancient way
(17-07-2017 07:25 PM)ghostexorcist Wrote:  I watch a lot of sword-making and metal-working videos on youtube. One particular youtuber, Clickspring, is attempting to build a working model of the Antikythera mechanism, an astronomical calculator built between 200 and 70 BCE.

https://en.wikipedia.org/wiki/Antikythera_mechanism

Apart from the main build videos, he uploads videos of him making the same kinds of tools that the original craftsman would have used at this time. The following video is a super interesting primer on case-hardening, the process of hardening metal tools that do not have enough carbon to harden like steel. Instead, charcoal made from leather is used as the carbon source and the item is hardened from the outside inward.




Case-hardening really does just mean the exterior of the metal getting hardened. Making the entire article that hard would actually make it subject to brittle fracture. If the interior is still relatively softer, the item will be stronger.

https://en.wikipedia.org/wiki/Case-hardening

My current desktop is a line drawing of the Antikythera mechanism, though it doesn't show the gear teeth. Thumbsup

It is nothing short of amazing what people accomplished so many thousands of years ago. When people these days think they are so smart compared to people from that long ago, they haven't a clue what they were really like. Euclid, Archimedes, Plato, etc.
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17-07-2017, 08:17 PM
RE: Case-hardening the ancient way
(17-07-2017 08:15 PM)Fireball Wrote:  
(17-07-2017 07:25 PM)ghostexorcist Wrote:  I watch a lot of sword-making and metal-working videos on youtube. One particular youtuber, Clickspring, is attempting to build a working model of the Antikythera mechanism, an astronomical calculator built between 200 and 70 BCE.

https://en.wikipedia.org/wiki/Antikythera_mechanism

Apart from the main build videos, he uploads videos of him making the same kinds of tools that the original craftsman would have used at this time. The following video is a super interesting primer on case-hardening, the process of hardening metal tools that do not have enough carbon to harden like steel. Instead, charcoal made from leather is used as the carbon source and the item is hardened from the outside inward.




Case-hardening really does just mean the exterior of the metal getting hardened. Making the entire article that hard would actually make it subject to brittle fracture. If the interior is still relatively softer, the item will be stronger.

https://en.wikipedia.org/wiki/Case-hardening

My current desktop is a line drawing of the Antikythera mechanism, though it doesn't show the gear teeth. Thumbsup

It is nothing short of amazing what people accomplished so many thousands of years ago. When people these days think they are so smart compared to people from that long ago, they haven't a clue what they were really like. Euclid, Archimedes, Plato, etc.

Bull. It was all aliens.
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17-07-2017, 09:06 PM (This post was last modified: 17-07-2017 09:12 PM by Fireball.)
RE: Case-hardening the ancient way
(17-07-2017 08:17 PM)ghostexorcist Wrote:  
(17-07-2017 08:15 PM)Fireball Wrote:  Case-hardening really does just mean the exterior of the metal getting hardened. Making the entire article that hard would actually make it subject to brittle fracture. If the interior is still relatively softer, the item will be stronger.

https://en.wikipedia.org/wiki/Case-hardening

My current desktop is a line drawing of the Antikythera mechanism, though it doesn't show the gear teeth. Thumbsup

It is nothing short of amazing what people accomplished so many thousands of years ago. When people these days think they are so smart compared to people from that long ago, they haven't a clue what they were really like. Euclid, Archimedes, Plato, etc.



Bull. It was all aliens.

Laugh out load It never ceases to amaze how little credit the general populace gives the rest of the general populace, or even themselves. Huh People can get on their knees and pray, and when they focus on the problem long enough, come up with a solution and call it "divine inspiration", credit "divine agency" and then prosecute that inspiration as though they have no ownership of it, because it had to have come to them from an external agent. Ought to give themselves a little credit.
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18-07-2017, 06:31 AM
RE: Case-hardening the ancient way
Fireball has it right..

Case hardening is made to harden the outside of a steel part, in extreme cases up to .060 inch deep... The interior is left dead soft.. This gives surface hardness while allowing flexibility. Through hardening can make an item stronger to a degree, but makes it more likely to break, rather than simply giving way..

.......................................

The difference between prayer and masturbation - is when a guy is through masturbating - he has something to show for his efforts.
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