wiki-Forging

Definition: A knife-making process in which steel is heated to high temperatures (typically above 1,000 °C) and shaped by hammering or pressing, improving both form and internal structure.
Details: Forging refines the crystalline structure of the steel, making it stronger, tougher, and more uniform. The heated material is softened for shaping, then repeatedly struck or pressed until it takes the desired blade form. Traditional Japanese knife-making often combines forging (hizukuri) with forge welding (wakashi-tsuke).
Comparison: Unlike forge welding, which bonds different metals together, forging primarily shapes a single piece of steel. Compared to stamped knives (cut from sheet steel), forged knives are stronger, more durable, and offer superior cutting performance.
Practical Use: In production, raw steel is cut to size, heated to red-hot, then forged with hammers or mechanical presses. After shaping, the blade undergoes cooling, grinding, and polishing before hardening and sharpening. This process produces knives that resist deformation and retain sharpness over time.
Cultural Note: In Japan, forging (hizukuri) is regarded as a cornerstone of traditional craftsmanship. Passed down for centuries, it embodies the philosophy of transforming raw steel into a functional yet refined tool, symbolizing both strength and artistry.

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