中華包丁 直澄 SK材 日本鋼 180mm(Chinese knife Naosumi SK material Japanese steel 180mm)

刃物の説明
産地：岐阜県 関市(関 刃物)
分類：中華包丁
刃渡り：180mm
鋼材：SK材(日本鋼)
柄：積層合板


SK材とは0.55〜1.5％の炭素を含有し、特別にクロム・モリブデン等の合金元素を
添加していない高炭素鋼で、工具などでは使用頻度の高い材料です。
SKの名称は英語と日本語が混じった略称です。SはSteel、Ｋは工具のKです。
SK材は、S-C材(機械構造用炭素鋼材)のように、炭素含有量が約0.6％までは炭素の増加に伴い
より硬い熱処理硬度が得やすくなりますが、0.6％以上になりますと熱処理硬度の上昇が急激に
鈍ります。
SK材は焼入性よりも耐衝撃性や耐摩耗性が求められることが多く、中でも炭素量が低い鋼種は
打撃を与える用途、つまり靭性を必要とする耐衝撃性向き、炭素量が高い鋼種は切れ味を
必要とする耐摩耗性向きに選択されますので、包丁にはこちらを使用します。
SK材は昔から包丁によく使われる材質で、家庭用などに使われるスタンダードな鋼です。
サビる材質なので、モリブデンなどのステン系より切れ味は良いです。



Description of the knife
Place of origin: Seki City, Gifu Prefecture (Seki knife)
Category: Chinese knife
Blade length: 180mm
Steel: SK material (Japanese steel)
Handle: Laminated plywood


SK material is a high-carbon steel that contains 0.55-1.5% carbon and does not contain any alloying elements such as chromium or molybdenum, and is a material that is frequently used in tools.
The name SK is an abbreviation that combines English and Japanese. S stands for steel and K stands for tool.
SK material, like S-C material (carbon steel for machine construction), can easily obtain a harder heat treatment hardness with an increase in carbon up to about 0.6% carbon content, but above 0.6%, the increase in heat treatment hardness rapidly slows down.
SK materials are often required for impact resistance and abrasion resistance rather than hardenability, and among them, steels with low carbon content are selected for applications where impacts are applied, i.e. impact resistance that requires toughness, while steels with high carbon content are selected for abrasion resistance that requires sharpness, so these are the materials used for knives.
SK material has been a material that has been often used for knives for a long time, and is a standard steel used for household use.
Because it is a material that rusts, it has better sharpness than stainless steels such as molybdenum.