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ariel · 16th December 2020, 01:42 PM

Marius,

Japanese blades were forged from two kinds of steel and were true pattern-welded.
First, by a tatara process they got a bloom, crushed it and the smith separated high-carbon from low- carbon fragments and forged them separately into 2 different bars, one of “ hagane “ steel with ~1.4% carbon, another from “ zuku” steel with 3-4% carbon. After that, they forged them together, bent them, twisted them etc, and got a pattern welded blade.
The same process was used by Northern Europeans to produce “ Viking swords”. Even La Tene swords upon polishing and etching reveal pattern-welded structure.

All that I have learned from Manfred Sachse’s book.

16th December 2020, 01:42 PM	#7
ariel Member Join Date: Dec 2004 Location: Ann Arbor, MI Posts: 5,503	Marius, Japanese blades were forged from two kinds of steel and were true pattern-welded. First, by a tatara process they got a bloom, crushed it and the smith separated high-carbon from low- carbon fragments and forged them separately into 2 different bars, one of “ hagane “ steel with ~1.4% carbon, another from “ zuku” steel with 3-4% carbon. After that, they forged them together, bent them, twisted them etc, and got a pattern welded blade. The same process was used by Northern Europeans to produce “ Viking swords”. Even La Tene swords upon polishing and etching reveal pattern-welded structure. All that I have learned from Manfred Sachse’s book.