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The blade is made of non-rustproof carbon steel, blue-plastered by hand and finely forged from the base to the tip of the knife. The 90 mm (3.5 in) long blade shows patina (dark spots) caused by decades of use. It can easily be sharpened to a shaving sharp edge. Carbon steel is a popular choice for rough-use knives and cheaper options.
Layered steel forms a wood-grain pattern when the blade is filed and polished Blue mokumegane steel, showing knot-like patterns in the metal. Metallurgy did not arise as a science until the early 20th century. Before this, metallography was the primary method used for studying metals. Metallography is the study of the patterns in metals, the ...
A laminated steel blade or piled steel is a knife, sword, or other tool blade made out of layers of differing types of steel, rather than a single homogeneous alloy.The earliest steel blades were laminated out of necessity, due to the early bloomery method of smelting iron, which made production of steel expensive and inconsistent.
Technically, it is a style of lamination used for blade construction, commonly used on blades that have a symmetrical grind (i.e. the edges are ground down from both sides to expose the edge, which is composed of the inner core material. In Japan, traditionally the steel used for the outer layer is Gukunan-tetsu [4]
The Chinese swords had edges made of crucible steel similar to the metal found in Damascus swords, which were welded to a back of soft iron, to give both a hard and strong cutting edge but keeping the rest of the sword soft to prevent breakage. These produced a very hard and visible patterned-edge with a very visible transition at the weld, due ...
A blade ground from such a blank can show a pattern similar to wood grain with small random variations in pattern. Some manufactured objects can be re-purposed into pattern welded blanks. "Cable Damascus", forged from high carbon multi-strand cable, is a popular item for bladesmiths to produce, producing a finely grained, twisted pattern, while ...