碳鋼
碳鋼
Carbon steel is reactive — it will rust quickly if not properly cared for. Always wash immediately after use, dry thoroughly, and apply a thin coat of food-safe oil (camellia, mineral) before storage. Over time it develops a patina that offers some natural protection and, for many users, becomes part of the knife's character. Rewarding to use, but not recommended if you want a "wash and forget" knife. 日立特殊鋼，日本
Carbon steel is reactive — it will rust quickly if not properly cared for. Always wash immediately after use, dry thoroughly, and apply a thin coat of food-safe oil (camellia, mineral) before storage. Over time it develops a patina that offers some natural protection and, for many users, becomes part of the knife's character. Rewarding to use, but not recommended if you want a "wash and forget" knife. 日立特殊鋼，日本
白三鋼 / 白三鋼 White #3 鋼
硬度
洛氏硬度(HRC) 衡量鋼材抵抗永久變形的能力。就廚刀而言：
55–58 HRC — Soft. Easy to sharpen and forgiving of rough use, but dulls faster. Typical of most German knives.
59–61 HRC — Balanced. Good edge retention with manageable sharpening. Common in mid-range Japanese knives.
62–64 HRC — Hard. Excellent edge retention, holds a very fine edge. Requires more care and a fine stone to sharpen.
65+ HRC — Very hard. Exceptional edge longevity but more brittle — more prone to chipping if used roughly.
Higher is not always better — it depends on how you use and maintain your knife.
55–58 HRC — Soft. Easy to sharpen and forgiving of rough use, but dulls faster. Typical of most German knives.
59–61 HRC — Balanced. Good edge retention with manageable sharpening. Common in mid-range Japanese knives.
62–64 HRC — Hard. Excellent edge retention, holds a very fine edge. Requires more care and a fine stone to sharpen.
65+ HRC — Very hard. Exceptional edge longevity but more brittle — more prone to chipping if used roughly.
Higher is not always better — it depends on how you use and maintain your knife.
59–61
HRC
555759616365+
白三鋼雖然不像白一鋼或白二鋼那樣常被提及，但它是日本高碳鋼家族——白紙鋼系列中的另一個變體。與白一鋼（1.2%）和白二鋼（1.0%）相比，其碳含量較低（0.8%），因此鋼材略軟，使用時更具韌性。這項特性使其更容易研磨，且較不易崩刃，但在鋒利度保持上可能不如高碳含量的同門鋼材。白三鋼適合追求傳統日本刀具細膩鋒利度與純淨感，但偏好刃口保養不需過於費心的使用者。與其他白紙鋼相同，此鋼材反應性高，需妥善保養以防止生鏽與腐蝕。白三鋼在易研磨性與性能之間取得良好平衡，是初次接觸高碳日本刀或需要更耐用刃口的絕佳入門選擇。
成分
白三鋼 / 白三鋼 元素組成
比較對象
白三鋼 / 白三鋼
—
0.8%
0.6%
0.4%
0.2%
0
C
0.8%
Mn
0.2%
Si
0.1%
P
0.025%
S
0.004%
C — 碳
Mn — 錳
Si — 矽
P — 磷
S — 硫
硬度
59–61 HRC
555759616365+
白三鋼 / 白三鋼 成分分析
白三鋼 / 白三鋼 含有什麼？
每種元素對刀鋼性能的貢獻。
| 元素 | 規格範圍 | 對刀的作用 |
|---|---|---|
| C碳 | 0.8–0.9% | The primary hardening element. More carbon means a harder edge that holds longer — but past a point it trades away toughness and rust resistance. |
| Mn錳 | 0.2–0.3% | Aids hardenability and strength and acts as a deoxidiser in smelting. Too much can reduce toughness. |
| Si矽 | 0.1–0.2% | Strengthens the steel matrix and acts as a deoxidiser, improving hardness and resistance to oxidation. |
| P磷 | 0.025% | An impurity from smelting. Even small amounts promote brittleness, so steelmakers keep it as low as possible. |
| S硫 | 0.004% | An impurity that reduces toughness and promotes brittleness; only ever added deliberately in free-machining steels. |
成分資料取自 zknives（K&S 鋼材資料集）參考文獻。這些範圍來自 K&S 鋼材成分資料集，該資料集源自 zknives；僅在頁面實際引用製造商數據時，才會另行標註製造商數據。
