unique patterned blade

Mark · 19th February 2005, 09:47 PM

Gorgeous. It goes without saying. As for the pattern, from looking at it I am going to venture a guess that it was made by braiding wire of two or more different types of steel, then bending it back and forth in a series of tight S curves and forging the whole thing together. You can see both the braided pattern, and the S turns near the eges. I know it sounds like it would be a very weak ingot, but I has seen some pretty damn amazing things done with pattern welding, notably by "Grandpa" Daryl Meier.

http://www.meiersteel.com/main.html

tom hyle · 20th February 2005, 01:38 AM

The pattern may only be on the outside of a sandwich type blade?

Mark · 20th February 2005, 01:41 AM

Quote:

Originally Posted by tom hyle

The pattern may only be on the outside of a sandwich type blade?

Very good point. It does look at the edges like there is an homogenous inner layer.

JPSF · 21st February 2005, 07:42 PM

Check with Philip Tom about the composition of the blade. He repolished it and knows a lot more about patterned steel than I do.

The scabbard is original as are the kalti, karda and chakmak. The sangli which is actually the carry belt has been restored.

Philip · 22nd February 2005, 07:01 AM

The blade consists of a homogenous, high-carbon center plate (which forms the cutting edge when exposed by grinding the V-shaped edge bevel) flanked on each side by "cheeks" of the pattern-welded laminate. I'm still trying to figure out how the alternative fern-leaf patterns were done. A previous post mentioned the likelihood that such a pattern might be susceptible to lateral stresses, compared to simple linear lamination. The beauty of sandwiching a hard steel core between laminates is that you get a lot of structural support, and are free to do wild patterns like this on the outer plates without fear of sacrificing strength.

This tripartite assembly is widely used in the Orient. It's called sanmai in Japanese, sanmei in Chinese. I've seen it on Moro campillions and krises, on mandaus, and so forth.

What the photos don't show on this hanshee is the heat treat details. When viewed from a particular angle, this blade has a slightly darkened zone along the edge, just over 1/2 in. wide at most. The smith heated up the edge portion in his forge, and then quenched it in water. The dark zone represents the crystallization of the steel into the molecular structure which makes the edge harder than the rest of the blade, which stays somewhat softer, avoiding the tendency towards brittleness.

tom hyle · 22nd February 2005, 09:31 AM

My experience of kukuris, while limitted, is that they are differentially hardened in much this way.

22nd February 2005, 07:01 AM	#5
Philip Member Join Date: Dec 2004 Location: California Posts: 1,036	composition of blade The blade consists of a homogenous, high-carbon center plate (which forms the cutting edge when exposed by grinding the V-shaped edge bevel) flanked on each side by "cheeks" of the pattern-welded laminate. I'm still trying to figure out how the alternative fern-leaf patterns were done. A previous post mentioned the likelihood that such a pattern might be susceptible to lateral stresses, compared to simple linear lamination. The beauty of sandwiching a hard steel core between laminates is that you get a lot of structural support, and are free to do wild patterns like this on the outer plates without fear of sacrificing strength. This tripartite assembly is widely used in the Orient. It's called sanmai in Japanese, sanmei in Chinese. I've seen it on Moro campillions and krises, on mandaus, and so forth. What the photos don't show on this hanshee is the heat treat details. When viewed from a particular angle, this blade has a slightly darkened zone along the edge, just over 1/2 in. wide at most. The smith heated up the edge portion in his forge, and then quenched it in water. The dark zone represents the crystallization of the steel into the molecular structure which makes the edge harder than the rest of the blade, which stays somewhat softer, avoiding the tendency towards brittleness.

19th February 2005, 09:47 PM	#1
Mark Member Join Date: Dec 2004 Posts: 987	Gorgeous. It goes without saying. As for the pattern, from looking at it I am going to venture a guess that it was made by braiding wire of two or more different types of steel, then bending it back and forth in a series of tight S curves and forging the whole thing together. You can see both the braided pattern, and the S turns near the eges. I know it sounds like it would be a very weak ingot, but I has seen some pretty damn amazing things done with pattern welding, notably by "Grandpa" Daryl Meier. http://www.meiersteel.com/main.html

20th February 2005, 01:38 AM	#2
tom hyle Member Join Date: Dec 2004 Location: Houston, TX, USA Posts: 1,254	The pattern may only be on the outside of a sandwich type blade?

21st February 2005, 07:42 PM	#4
JPSF Member Join Date: Dec 2004 Posts: 56	Check with Philip Tom about the composition of the blade. He repolished it and knows a lot more about patterned steel than I do. The scabbard is original as are the kalti, karda and chakmak. The sangli which is actually the carry belt has been restored.

22nd February 2005, 09:31 AM	#6
tom hyle Member Join Date: Dec 2004 Location: Houston, TX, USA Posts: 1,254	My experience of kukuris, while limitted, is that they are differentially hardened in much this way.