Steel with high hardness and excellent toughness

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United States of America Patent

PATENT NO 11162162
SERIAL NO

16467225

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Abstract

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A steel with high hardness and excellent toughness contains, in mass %, 0.40-1.00% C, 0.10-2.00% Si, 0.10-1.00% Mn, 0.030% or less P, 0.030% or less S, 1.10-3.20% Cr, 0.010-0.10% Al, and 0.15-0.50% V, and further contains at least one or two of 2.50% or less Ni and 1.00% or less Mo, with an amount of (C+V) being 0.60% or more in mass %, with the balance consisting of Fe and unavoidable impurities. The steel has a microstructure which is a martensitic structure with finely dispersed Fe-based ε carbides, with its prior austenite grain size being 20 μm or less.

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Patent Owner(s)

Patent OwnerAddress
KOMATSU LTD1-2-20 KAIGAN MINATO-KU TOKYO 1058316 ?1058316
OSAKA UNIVERSITY1-1 YAMADAOKA SUITA-SHI OSAKA 565-0871

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fujimatsu, Takeshi Himeji, JP 40 465
Hagihara, Koji Suita, JP 8 58
Hiratsuka, Yusuke Himeji, JP 4 3
Ikurumi, Shohei Tokyo, JP 2 0
Minamino, Yoritoshi Suita, JP 2 3
Sugimoto, Toshiyuki Himeji, JP 89 620
Yamamoto, Koji Tokyo, JP 384 3625

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