A modern steel-making process where the alloy is atomised into a fine powder and then compressed under high pressure before sintering. This creates an exceptionally uniform carbide distribution — far finer and more even than conventionally cast steel. The result is a blade that achieves higher hardness without sacrificing toughness, holds a keener edge for longer, and is more resistant to chipping. PM steels are generally considered a step up in performance, though they can be harder to sharpen on coarse stones. Hitachi Special Steel, Japan 🇯🇵
ZDP-189 粉末高速工具鋼 ZDP-189
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.
ZDP-189 元素組成
Expert Answers
Curated by the Knives and Stones team
ZDP-189鋼材用於廚刀的優缺點
研究顯示的結果
ZDP-189是日立特殊鋼出產的粉末冶金不鏽鋼，含碳量約3%、鉻含量約20%，通常硬化至63–66 HRC——是量產廚刀中硬度最高的鋼材之一。其優點是卓越的鋒利度保持性、能磨出極細的刃口，以及不鏽鋼等級的抗鏽能力。缺點同樣有充分記載：研磨困難且耗時、極高的硬度使刃口在扭轉或側向受力時更容易產生微崩口，而且刀具價格較高。市場共識將其定位為專業級鋼材，適合重視鋒利度壽命更勝於易於保養的資深使用者。
Knives & Stones 的觀點
老實說：我自己不會想磨一把ZDP-189的刀——在磨石上的手感回饋很怪，而且3%碳、20%鉻讓它研磨起來又慢又費力。所以我的原則是：除非你絕對需要市面上最頂級的鋒利度保持性，否則請考慮SG2/R2或SKD。兩者都能達到62–64 HRC，鋒利度保持性遠勝VG-10，而且研磨和日常保養都輕鬆得多。話雖如此，如果鋒利度壽命真的是你的首要考量，63–66 HRC的ZDP-189確實貨真價實，我們有進兩位我相當推崇的刀匠作品：佑成與初心。我會推薦初心隼 ZDP-189 鏡面牛刀 240mm（澳幣440元）——不過請記得把鑽石磨石的預算也算進去。
Frequently asked questions
ZDP-189 高碳不鏽鋼用於廚刀的優缺點
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Knives in ZDP-189
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佑成
佑成 ZDP-189 Hairline K tip 牛刀 270mm
佑成
佑成 ZDP-189 Hairline K tip 牛刀 210mm
佑成
佑成 ZDP-189 Hairline 切付牛刀 240mm
佑成
佑成 ZDP-189 Hairline 牛刀 240mm
初心
初心 隼 ZDP-189 鏡面 牛刀 240mm
初心
初心 隼 ZDP-189 鏡面 牛刀 210mm
佑成
佑成 ZDP-189 大馬士革 切付 (切付) 牛刀 240mm Birch Burl Handle
佑成
佑成 ZDP-189 大馬士革 牛刀 270mm Birch Burl Handle
佑成
佑成 ZDP-189 大馬士革 牛刀 240mm Birch Burl Handle
佑成
佑成 ZDP-189 大馬士革 牛刀 210mm Birch Burl Handle
佑成
佑成 ZDP-189 大馬士革 筋引 240mm Burl Handle with 刀鞘
初心
