Maker: Takefu Special Steel (click to see more by this maker)
Item num: 94412
Total length: 12.00 in.
Item weight: 7.84 oz.
Size: .12" x 12" x 1-1/4"
Description: This 3mm thick bar of laminated Takefu steel is cut to 12 inches long and is 1-1/4 inches wide.
This bar is pre-laminated VG10 DPS 15 Layer Clad Stainless Steel. This means that a central layer of VG10 premium stainless steel is surrounded by alternating layers of stainless steel and nickel, for a total of 31 layers. The nickel acts as a barrier to stop carbon migration when combined with layers of stainless steel, it creates a particularly dramatic and bold pattern. The linear layers can either be ground to shape or the bar can be forged, allowing for nearly endless patterns - from chevrons, to ladder, pool & eye and more.
The VG10 core is made from pure iron material, resulting in ductility, workability and forgeability. VG10 is free from impure substances and achieves good abrasion resistance. The addition of 15% of Cr provides corrosion resistance while 1% of Mo and 1.5% of Co makes a stronger matrix (substrate) and prevents carbides from dropping out of solution. By adding V, the structure becomes finer. Added Cr, Mo, and V form many hard carbides, so abrasion resistance improves -- giving knives long-term edge holding for clean cutting. VG10 is very machinable and easy to grind.
VG10 also has a quadratic effect in high-temperature tempering that it is ideal for use in cutting tools which are given surface-coating at up to about 450°C.
Forging: Forge at 1100°C/2012°F. Do not forge below 1000°C/1832°F. You should anneal after forging
Annealing: Anneal at 870°C/1598°F. Cooling speed should not exceed 25°C/hr - 77°F/hr
Quenching: Quench at 1050-1100°C/1922-2012°F. Quench in oil (50°C/122°F) or air (25°C/77°F)
Tempering: Temper at 150-250°C (302-482°F). If you coat such as TiC, temper at 540°C/1004°F
Annealed: Hrc 25
Hardened: Hrc 61
Sub-Zero: Hrc 61.5
Mastersmith Bill Burke's Heat Treatment Recommendation: After forging/annealing, grind blade to 220 grit (120 grit minimum) finish. Wrap in high temp stainless foil, being sure to seal air tight. Place blade in heat treat oven and ramp oven to 1560 °F and hold 30 minutes. Ramp oven to 1940°F and hold a maximum of 10 minutes. Air, oil or plate quench. Subzero quench at -112°F to -300°F for 60 minutes. Temper 2x for two hours each cycle for desired hardness at 300 - 480°F.
Note: results may vary with hardening method and section size. Salt or oil quenching will give maximum results. Vacuum or atmosphere cooling may result in up to 1-2 Hrc lower.
Availability: In stock. Usually ships in 1-2 business days