Description
Yu-Shoku is pre-laminated with a V-Toku2 carbon steel core with mokume cladding (forged from copper, brass and stainless steel). DPS (depletion prevention system) adds a thin nickel shim between the core steel and the cladding. The nickel acts as a barrier to stop carbon migration between the carbon steel core and mokume outer layers and creates a particularly dramatic and bold transition line. We recommend not upset forging this material as this can cause delamination.
The V-Toku 2 carbon steel core contains very few impurities and is easy to heat treat. It has good ductility, workability, and is easily forged. Hard and fine carbides are formed by adding Chromium, Tungsten and Vanadium, ensuring tremendous durability and edge holding. The addition of Tungsten brings about high toughness and high strength at elevated temperatures. Vanadium ensures fine grain. These effects are even more enhanced with the addition of Chromium. Although ease of quenching and improved annealing are rarely found together, precise amounts of Manganese and Chromium gives this desired effect. Because of the high toughness of V-Toku 2 it can be used at extremely high hardness, HRC 65 in Chefs’ knives, and 60-61 HRC in sporting knives.
Takefu Special Steel Co., Ltd. manufactures and markets clad metals using rolling mills, bonding presses, and diffusion bonding. The company was founded in 1954 and is based in Echizen, Fukui Prefecture, Japan.
Clad or composite materials are composed of more than two kinds of dissimilar metals having high functional capabilities; the bonding process combines the advantages of each metal into one solid piece where the sum is greater than the two parts. Takefu Special Steel Co. supplies a wide variety of cutlery materials not only for household use but also for use in industrial machinery mainly to cutlery production areas both in Japan and abroad. For cutlery steels Takefu Special Steel Co ranks first in market share nationwide in Japan in the manufacture of dissimilar metal composite materials （clad materials. Takefu Special Steel Co also caters to the demands for nonferrous composite materials such as titanium, copper, aluminum, etc. Thus, besides cutlery steels, they have successfully developed a new field of industrial materials such as special metal molds, electrodes, etc.
