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Thyssen-Krupp names their steels using standard convention, i. e. removing .1 from w-Nr 1.4116. Under the DIN system, this steel is described as X50CrMoV15, with the X indicating stainless steel, the 50 referring to the carbon content in hundredths of a percent, and the 15 referring to the percentage of chromium rounded to the nearest whole number.
The steel is then forged into a single plate, and the pieces of cast-iron are piled on top, and the whole thing is forge welded into a single billet, which is called the age-kitae process. The billet is then elongated, cut, folded, and forge welded again. The steel can be folded transversely (from front to back), or longitudinally (from side to ...
Pattern welding dates to the first millennium BC, with Celtic, and later Germanic swords exhibiting the technique, [5] with the Romans describing the blade patternation. [6] [7] By the 2nd and 3rd century AD, the Celts commonly used pattern welding for decoration in addition to structural reasons.
Katana, showing the hamon as the outline of the yakiba. The nioi appears faintly as the bright line following the hamon; especially visible at the tip ( kissaki ). In swordsmithing , hamon ( 刃文 ) (from Japanese , literally "edge pattern") is a visible effect created on the blade by the hardening process.
Where iron and steel are plentiful this method is frequently used as it requires less time. In places and times where iron and steel have been more rare and valuable stock removal has not been used except as part of the finishing process. In most techniques, the basic materials, generally iron and/or steel, are shaped into a bar or billet first.
A diagram of a katana and koshirae with components identified. Fuchi (縁): The fuchi is a hilt collar between the tsuka and the tsuba.; Habaki (鎺): The habaki is a wedge-shaped metal collar used to keep the sword from falling out of the saya and to support the fittings below; fitted at the ha-machi and mune-machi which precede the nakago.
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