Metal Detection

[openspaceman]

2 hours ago, treequip said:

Hmmmmmmm

 

that sounds a bit urban made up to me, hoof grows and shoes wear out and are replaced regularly, the nails aren't re used so they aren't in use anything like long enough for any work hardening to take place. It would also be a PITA to forge weld something as small as nails in a meaningful billet and the losses to scale would be huge unless you went to the trouble of canister welding it all, in short,  nice story but unlikely 

"In 1806 J.Jones was granted a British patent for the production of gun barrels using iron from horse shoe nails and steel from coach springs. The Damascus barrels were made by layering anything from 8 to 24 pieces of alternating strips of iron and steel and forging them together. These strips were then twisted into a spiral and used to make a 3 or 4 piece plait. The whole piece was then beaten flat into a ‘ribbon’ that would be twisted around a central mandrel (solid rod). Clockwise for the right hand barrel and anti-clockwise for the left. This ribbon was then hammer-welded together (forged) and the central mandrel removed to leave the barrel ready for boring and striking off."

 

Now not every patent gets used but...

[Stubby]

3 hours ago, openspaceman said:

"In 1806 J.Jones was granted a British patent for the production of gun barrels using iron from horse shoe nails and steel from coach springs. The Damascus barrels were made by layering anything from 8 to 24 pieces of alternating strips of iron and steel and forging them together. These strips were then twisted into a spiral and used to make a 3 or 4 piece plait. The whole piece was then beaten flat into a ‘ribbon’ that would be twisted around a central mandrel (solid rod). Clockwise for the right hand barrel and anti-clockwise for the left. This ribbon was then hammer-welded together (forged) and the central mandrel removed to leave the barrel ready for boring and striking off."

 

Now not every patent gets used but...

And they look superb . I would love to be able to afford a shot gun with  Damascus twist barrels !

Edited August 5, 2017 by Stubby

[Gary Prentice]

 

18 minutes ago, Stubby said:

And they look superb . I would love to be able to afford a shot gun with  Damascus twist barrels !

Bet you've enough stacked under the mattress to buy one

 

 

 

It think this thread wins the award for the first major derail of the new-look Arbtak forum

[treequip]

4 hours ago, openspaceman said:

"In 1806 J.Jones was granted a British patent for the production of gun barrels using iron from horse shoe nails and steel from coach springs. The Damascus barrels were made by layering anything from 8 to 24 pieces of alternating strips of iron and steel and forging them together. These strips were then twisted into a spiral and used to make a 3 or 4 piece plait. The whole piece was then beaten flat into a ‘ribbon’ that would be twisted around a central mandrel (solid rod). Clockwise for the right hand barrel and anti-clockwise for the left. This ribbon was then hammer-welded together (forged) and the central mandrel removed to leave the barrel ready for boring and striking off."

 

Now not every patent gets used but...

I am missing that part where it says  

Quote

as it was thought the constant pounding of the hoof gained them something

The spring steel element would be plenty to give the part strength, the pattern welding is a decorative touch and in real terms reduces the strength if the part.

 

 

 

[Stubby]

47 minutes ago, Gary Prentice said:

 

Bet you've enough stacked under the mattress to buy one

 

 

 

It think this thread wins the award for the first major derail of the new-look Arbtak forum

Yea ! What was the original post about Gary ?

[openspaceman]

28 minutes ago, treequip said:

I am missing that part where it says ...

 

 

 

You want jam on it too?

[openspaceman]

55 minutes ago, Gary Prentice said:

 

 

 

It think this thread wins the award for the first major derail of the new-look Arbtak forum

Mea culpa, anyway I was told that one needs the wood to pass through a coil to get the best detection. I would have thought with high power MOSFETs  you could induce a fair current in a piece of ferrous metal to increase the signal, non ferrous being less of a problem if small.

[treequip]

13 minutes ago, openspaceman said:

You want jam on it too?

Cant find it in the original either  http://www.castlegunmakers.co.uk/blog/2014/04/28/damascus-barreled-shotguns/ so it seems it was indeed an urban myth, all be it in the making. Busted

[openspaceman]

6 hours ago, openspaceman said:

"In 1806 J.Jones was granted a British patent for the production of gun barrels using iron from horse shoe nails and steel from coach springs. The Damascus barrels were made by layering anything from 8 to 24 pieces of alternating strips of iron and steel and forging them together. These strips were then twisted into a spiral and used to make a 3 or 4 piece plait. The whole piece was then beaten flat into a ‘ribbon’ that would be twisted around a central mandrel (solid rod). Clockwise for the right hand barrel and anti-clockwise for the left. This ribbon was then hammer-welded together (forged) and the central mandrel removed to leave the barrel ready for boring and striking off."

 

Now not every patent gets used but...

For completeness rather than feeding  under bridge dwellers:

 

"To make a Damascus gun barrel, ... The steel was often something like well used horseshoe nails, nails, work hardened by being hammered against the road many ..."

 

The originating site is down but the precis is still found b a search engine

[treequip]

22 minutes ago, openspaceman said:

For completeness rather than feeding  under bridge dwellers:

 

"To make a Damascus gun barrel, ... The steel was often something like well used horseshoe nails, nails, work hardened by being hammered against the road many ..."

 

The originating site is down but the precis is still found b a search engine

Its still "internet truth" and doesn't stand analysis. A horse shoe lasts about 6 weeks. Only the first mm or so would get any work hardening, and would also wear away as quick as it hardened, assuming the animal was on a paved surface and not on agricultural duty (as most were).

 

Just because someone put it on the net doesn't make it so