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George Patterson writes:
"So why not build the shaft entirely of hardened steel?", I hear you cry. That's because the harder steel is, the more brittle it becomes. The best strength comes from this sort of lamination of hard and soft steels. Saw a show w/ a Japanese craftsman making a sword. Two layers of different steels. Pounded it thin; folded it over; pounded... Many layers later, that was the sword... -- A host is a host from coast to & no one will talk to a host that's close........[v].(301) 56-LINUX Unless the host (that isn't close).........................pob 1433 is busy, hung or dead....................................20915-1433 |
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David Lesher wrote:
Saw a show w/ a Japanese craftsman making a sword. Two layers of different steels. Pounded it thin; folded it over; pounded... Many layers later, that was the sword... Yep, that's a very old technique. Westerners call it "Damascus steel." George Patterson Coffee is only a way of stealing time that should by rights belong to your slightly older self. |
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George Patterson wrote:
David Lesher wrote: Saw a show w/ a Japanese craftsman making a sword. Two layers of different steels. Pounded it thin; folded it over; pounded... Many layers later, that was the sword... Yep, that's a very old technique. Westerners call it "Damascus steel." Got a knife made using that technique. Beautiful grain, sort of like a nice gun stock made with multiple layers of different wood, beautiful when carved. The Monk |
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On Sun, 8 Jan 2006 19:41:33 +0000 (UTC), David Lesher
wrote: Saw a show w/ a Japanese craftsman making a sword. Two layers of different steels. Pounded it thin; folded it over; pounded... Many layers later, that was the sword... Right, but the entire blade is heat treated so that it is tempered, rather than hard. If it were made from the kind of steel that camshafts were cast from, it would be very brittle. Not many camshafts, in low rpm engines, require forged camshafts, there just isn't much pressure on them because they spin so slowly and the valve springs aren't very stiff. But all camshafts require heat treating the outer layer, or they'd wear out very quickly. Corky Scott |
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