Tool steel having strength and high impact toughness

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United States of America Patent

PATENT NO 11008634
APP PUB NO 20200102622A1
SERIAL NO

16174780

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Abstract

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A tool steel having strength and high impact toughness incudes 0.7 to 0.9 wt % of C, 0.4 to 0.6 wt % of Si, 0.4 to 0.6 wt % of Mn, 7.0 to 9.0 wt % of Cr, 1.5 to 2.5 wt % of Mo, up to 1.0 wt % or less (excluding 0 wt %) of V, 0.01 to 0.06 wt % of Ce, and a remainder of Fe and inevitable impurities, wherein the tool steel has a hardness of 59 to 65 HRC and an impact toughness of 30 to 42 J/cm2. The tool steel has super-high-strength combined with high impact toughness due to inclusion of Ce, thus reducing primary carbide content in an as-cast state and after solution treatment and tempering.

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Patent Owner(s)

Patent OwnerAddress
KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGYCHEONAN-SI CHUNGCHEONGNAM-DO 31056

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Han, Jin-Gu Cheongju-si, KR 1 1
Jun, Joong-Hwan Seoul, KR 4 11
Kim, Song-Yi Incheon, KR 9 66
Lee, Min-Ha Incheon, KR 4 6
Lim, Chae-Ho Incheon, KR 5 65

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