WW2 Japanese Arisaka Bayonet Kakura
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Saturday, 22 March 2014
WW2 Japanese Arisaka Bayonet Kakura
Friday, 21 March 2014
KATANA (samurai sword)
he authentic Japanese sword is made from a specialized Japanese steel called "Tamahagane" which consist of combinations of hard, high carbon steel and tough, low carbon steel. There are benefits and limitations to each type of steel. High-carbon steel is harder and able to hold a sharper edge than low-carbon steel but it is more brittle and may break in combat. Having a small amount of carbon will allow the steel to be more malleable, making it able to absorb impacts without breaking but becoming blunt in the process. The makers of a katana take advantage of the best attributes of both kinds of steel. This is accomplished through a number of methods, most commonly by making a U-shaped piece of high-carbon steel (the outer edge) and placing a billet of low-carbon steel (the core) inside the U, then heating and hammering them into a single piece. Some sword-makers use four different pieces (a core, an edge, and two side pieces), and some even use as many as five.
The block of combined steel is heated and hammered over a period of several days, and then it is folded and hammered to squeeze the impurities out. Generally a katana is folded no more than sixteen times, then it is hammered into a basic sword shape. At this stage it is only slightly curved or may have no curve at all. The gentle curvature of a katana is attained by a process of quenching; the sword maker coats the blade with several layers of a wet clay slurry which is a special concoction unique to each sword maker, but generally composed of clay, water, and sometimes ash, grinding stone powder and/or rust. The edge of the blade is coated with a thinner layer than the sides and spine of the sword, then it is heated and then quenched in water (some sword makers use oil to quench the blade). The clay slurry provides heat insulation so that only the blade's edge will be hardened with quenching and it also causes the blade to curve due to reduced lattice strain along the spine. This process also creates the distinct swerving line down the center of the blade called the hamon which can only be seen after it is polished; each hamon is distinct and serves as a katana forger's signature.
The hardening of steel involves altering the microstructure or crystalline structure of that material through quenching it from a heat above 800 °C (1,472 °F) (bright red glow), ideally no higher than yellow hot. If cooled slowly, the material will break back down into iron and carbon and the molecular structure will return to its previous state. However, if cooled quickly, the steel's molecular structure is permanently altered. The reason for the formation of the curve in a properly hardened Japanese blade is that iron carbide, formed during heating and retained through quenching, has a lesser density than its root materials have separately.
After the blade is forged it is then sent to be polished. The polishing takes between one and three weeks. The polisher uses finer and finer grains of polishing stones until the blade has a mirror finish in a process called glazing. This makes the blade extremely sharp and reduces drag making it easier to cut with. The blade curvature also adds to the cutting power.
The block of combined steel is heated and hammered over a period of several days, and then it is folded and hammered to squeeze the impurities out. Generally a katana is folded no more than sixteen times, then it is hammered into a basic sword shape. At this stage it is only slightly curved or may have no curve at all. The gentle curvature of a katana is attained by a process of quenching; the sword maker coats the blade with several layers of a wet clay slurry which is a special concoction unique to each sword maker, but generally composed of clay, water, and sometimes ash, grinding stone powder and/or rust. The edge of the blade is coated with a thinner layer than the sides and spine of the sword, then it is heated and then quenched in water (some sword makers use oil to quench the blade). The clay slurry provides heat insulation so that only the blade's edge will be hardened with quenching and it also causes the blade to curve due to reduced lattice strain along the spine. This process also creates the distinct swerving line down the center of the blade called the hamon which can only be seen after it is polished; each hamon is distinct and serves as a katana forger's signature.
The hardening of steel involves altering the microstructure or crystalline structure of that material through quenching it from a heat above 800 °C (1,472 °F) (bright red glow), ideally no higher than yellow hot. If cooled slowly, the material will break back down into iron and carbon and the molecular structure will return to its previous state. However, if cooled quickly, the steel's molecular structure is permanently altered. The reason for the formation of the curve in a properly hardened Japanese blade is that iron carbide, formed during heating and retained through quenching, has a lesser density than its root materials have separately.
After the blade is forged it is then sent to be polished. The polishing takes between one and three weeks. The polisher uses finer and finer grains of polishing stones until the blade has a mirror finish in a process called glazing. This makes the blade extremely sharp and reduces drag making it easier to cut with. The blade curvature also adds to the cutting power.
Secrets of the Samurai Sword(full documentary)HD
English people archers had longbows, West old sheriffs had 06 guns,but Japan's samurai warriors had the most fearsome weapon of all: the razor-sharp, unsurpassed technology of the katana, or samurai sword. In this program, NOVA probes the centuries-old secrets that went into forging what many consider the perfect blade. Fifteen traditional Japanese craftsmen spent nearly six months creating the sword that NOVA follows through production, from smelting the ore to forging the steel to sharpening the blade to a keen edge capable of slicing through a row of warriors at one swoop.
Saturday, 15 March 2014
Aragami - Best Samurai Sword fight scene
History of the japanese sword
Archaeological evidence indicates that brand have existed in Nihon for its entire historical period. Shortstop heterosexual person brand imported from People's Republic of China and Korea are among the earliest weapon system found in historical sites around Japan. After 2000 B.C., when these steel first appeared, the Japanese Begin making their own steel . Around 700 A.D., Japanese swordJulia Evelina Smith forged the first of what are now considered the finest swords ever shuffle . The person considered responsible for vastly improving Japanese sword design and fabrication was a smith named Amakuni. Like others in his profession, he was responding to the huge demand for weapon shuffle by local, provincial, and national leaders . Regional conflicts over land rights and topic of power continuously erupted, and, when not state of war among themselves, the early Japanese were invading the Korean peninsula or China, or defending themselves against Korean and Chinese For more photo visit - All photographs are copyright of their respective proprietor invaders. Any leader with a supply of superior weapons was at a great vantage , so a invariable , long-full term travail to find swordmakers improving the craft ensued. The most devoted smiths made the quest for the perfect blade into a life pursuit, and men exist today who devote their lives to the graphics of swordmaking. The long sword in Japan has seen three major avatar , and for each type of sword exists a fighting style to match the blade's conformation . The early leaf blade , called chokuto or “straight swords,†tended to get longer as metallurgy techniques improved. Though not much is known about how these weapons were wielded, the extra length - without any significant increase in weight unit - certainly give the fighter more grasp . The script grip size of these blades suggests that they were hold in one hand. The two-edged blade suggests a jab and hacking style of fighting. The first major change in the shape of the sword came during Amakun
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