wiki-Aburayaki

Definition: A heat treatment method in which a heated knife is cooled in oil to harden the steel.
Details: Compared to water quenching, oil quenching cools more gradually, producing greater stability and reducing the risk of cracking. The hardened steel retains sharpness and cutting ability, often forming wave-like hamon patterns.
Comparison: Water quenching yields harder and sharper edges but risks cracking; oil quenching is safer and more forgiving, though edges may not hold sharpness as long.
Practical Use: Blacksmiths prefer oil quenching for its stability and higher success rate in production, while water quenching is reserved for high-end knives like honyaki, where maximum sharpness and tradition are emphasized.

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