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Messaggioda Aldebaran » 07/05/2010, 20:35

Jean Jacques Perret lived in France in the Eighteenth Century, and 'considered one of the most' big knife that ever lived.
As a boy he work 'cutlery factory in France.
Growing up, I go 'the right' of Medicine and Chirurgiaper improve the quality 'of surgical instruments in his country.
In 1771 he wrote a book: "L'Art du Coutelier.
This book deals with every aspect of the forging of cutting tools.
Blades, handles, steel, tools for hot working and cold drawing, heat treatment, have argued in a futuristic for its time (220 years ago).
This' proposing 'to your attention, it will be' a short treatise, written by the famous cutler on wootz Damascus, Damascus, or the East.
Based on what I wrote in chapter 29 of his book:
"Manners facon de faire de l'Acier Damas" ("Method of Making Steel in the style of Damascus") or "Method of forging Damascus.

Method of forging Damascus.
J. J. Perret, 1771

Perret said the following:
- "The Damascus steel is not 'good for forging steel table knives.
More 'than anything else, the cost' prohibitive in terms of work, quantity 'of coal used for forgiarlo.Infine to get 3 pounds of steel, and' must start with 6 pounds of steel, Amen.
It starts with the mold * six identical strips of iron, with CODEST measures:
12 cm in length
1 inch wide
1 / 12 inch thick.

He then forged steel blades * five more this time, the same measures of strips of iron.

We spaced strips of iron, with those of steel, may also be piu'o less than the number above.

All material, so 'organized, is taken with the tongs, caught in a vise, and placed in a fire at a medium temperature **.

Gradually, the temperature is increased, and the material in the grip turned and turned so that the heat spreads evenly throughout the piece.

Once the material reaches the cherry red before it becomes white, it is extracted from the forge a moment and leans the other 2 with pliers.
Resting the billet thus' created on the anvil, the hammer is not too hard ***.
The Damascus steel becomes so 'peculiar characteristics of tenacity and resistance uncommon compared with other steels.
If you want a knife, impact-resistant and able to keep the wire even after cutting very hard objects, after the cherry red, the billet must take the red copper.
If you want to instead forge a table knife or a razor, after the cherry red, the color and material as to reach a 'yellow oro.Inoltre must hammer a bit' more 'billet.
In this way the wire will keep 'his integrity' long.
For these reasons, the Damascus swords are the best to decapitate people, their sharp, 'the only one able to pass through the bones.
The steel must be hammered until it cools and the two primary steels are not sealed well together.
There is no 'need for additional heating.
Following the discovery * ", it is realized by placing the brace on sand **" or on the ground, placing the material inside and covering it entirely.
To increase the heat, do not use as the beginning, the bellows, but a simple sheet of paper waved at mo 'fan.
Once the steel reaches the cherry red, the blade goes off in water.
To sharpen the classic signs of Damascus, passed over with a feather, dilute nitric acid.

* Forge-forged = In this case, refers to a relaxing treatment at temperatures between 500 and 650 degrees.
** Average temperature = 800 degrees' or not.
*** = Hammering hammering the steel to eliminate the tensions internal to it.
* "Tempering = 500-560 degrees
** "The Sand = sand, so heated, turned into a mass, made in molds to cool, it became a good substitute for natural stone for sharpening.
External links: http://damascus.free.fr/f_damas/f_hist/perret.htm
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