不鏽鋼 不鏽鋼

"Stainless" means stain-resistant, not stain-proof. In kitchen use, the steel can still discolour or pit if exposed to acidic environments — citrus, vinegar, or salt water — for extended periods. Wash and wipe dry after every use, and avoid leaving the blade soaking in water. With basic care, a stainless knife is very low-maintenance and a great everyday choice. 武生特殊鋼，日本

Cobalt Special鋼鋼 Cobalt Special 鋼

硬度

60–62 HRC

555759616365+

武生特殊鋼的Cobalt Special鋼，常被稱為Cobalt Steel，是一種優質的高性能鋼材，以其卓越的鋒利保持性和硬度而聞名。這種鋼在成分中加入了大量的鈷，增強了其耐磨性和強度。鈷的添加，加上碳、鉻和鉬等其他元素，使鋼材能夠達到高硬度，同時不犧牲韌性。Cobalt Special鋼旨在長時間保持鋒利邊緣，即使在嚴苛使用下亦然，因此備受推崇，用於製作高端廚刀和切割工具。
如魔刃（Mojin）和黑崎（Kurosaki）等製造商，都有一些出色的COSP產品。

比較對象

Cobalt Special鋼鋼

—

16.0% 12.0% 8.0% 4.0% 0

1.05%

16.0%

0.25%

1.5%

0.25%

2.5%

C — 碳 Cr — 鉻 V — 釩 Mo — 鉬 W — 鎢 Co — 鈷

硬度 60–62 HRC

555759616365+

鋼材

Cobalt Special鋼鋼

類別

不鏽鋼

製造商

武生特殊鋼，日本

硬度

60–62 HRC

Cobalt Special鋼鋼成分分析

Cobalt Special鋼鋼含有什麼？

每種元素對刀鋼性能的貢獻。

Cobalt Special鋼鋼元素成分與規格範圍
元素	規格範圍	對刀的作用
Cr鉻	15.0–17.0%	Raises corrosion resistance; at roughly 13%+ free chromium the steel qualifies as stainless. Also improves hardenability and wear.
Co鈷	2.0–3.0%	Allows higher hardening temperatures for more hardness and wear resistance, and strengthens the steel matrix.
Mo鉬	1.0–2.0%	Improves hardenability and toughness, boosts corrosion resistance, and helps the steel hold hardness under heat.
C碳	0.95–1.15%	The primary hardening element. More carbon means a harder edge that holds longer — but past a point it trades away toughness and rust resistance.
Si矽	0.6–0.7%	Strengthens the steel matrix and acts as a deoxidiser, improving hardness and resistance to oxidation.
Mn錳	0.3–0.5%	Aids hardenability and strength and acts as a deoxidiser in smelting. Too much can reduce toughness.
V釩	0.2–0.3%	Forms extremely hard vanadium carbides for superior edge retention, and refines the grain for a finer, tougher edge.
W鎢	0.2–0.3%	Forms hard carbides for wear resistance and edge stability, and keeps the steel hard even at elevated temperatures.
Ni鎳	0.25%	Improves toughness and ductility without sacrificing hardness, and adds a small boost to corrosion resistance.
P磷	0.03%	An impurity from smelting. Even small amounts promote brittleness, so steelmakers keep it as low as possible.
S硫	0.01%	An impurity that reduces toughness and promotes brittleness; only ever added deliberately in free-machining steels.