Martensitic stainless steel with excellent hardenability
AssigneePosco
InventorsHyung-gu Kang, Dong-hoon Kim, Gyujin Jo
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Abstract
Disclosed is a martensitic stainless steel with excellent hardenability through the control of a component system. The martensitic stainless steel with excellent hardenability comprises, in percent by weight (wt %), 0.01 to 0.1% of C, 0.05 to 0.1% of Si, 0.05 to 1.0 of Mn, 11.0 to 14.0% of Cr, 0.05 to 1.0% of Ni, 0.05 to 2.0% of Cu, to 0.08% of N, and the balance of Fe and inevitable impurities, and satisfies Formula (1). 1.0≤Mn+Ni+Cu≤2.5, Formula (1): wherein Mn, Ni, and Cu denote contents (wt %) of elements, respectively.
Claims6
A martensitic stainless steel with excellent hardenability comprising, in percent by weight (wt %), 0.01 to 0.1% of C, 0.05 to 1.0% of Si, 0.05 to 1.0 of Mn, 11.0 to 14.0% of Cr, 0.05 to 1.0% of Ni, 0.05 to 2.0% of Cu, 0.04 to 0.08% of N, and the balance of Fe and inevitable impurities, and
- satisfying Formula (1) below:
- 1.0≤Mn+Ni+Cu≤2.5, Formula (1):
- wherein Mn, Ni, and Cu denote contents (wt %) of elements, respectively,
- wherein the number of precipitates having a major axis length of greater than 1 μm is 2 pieces/100 μm2 or less in an arbitrary cross section, and
- wherein a Rockwell hardness deviation is 2.0 or less in an arbitrary cross section.
Dependencies are inferred from the claim text.